US2638179A - Drying capsule - Google Patents

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US2638179A
US2638179A US137045A US13704550A US2638179A US 2638179 A US2638179 A US 2638179A US 137045 A US137045 A US 137045A US 13704550 A US13704550 A US 13704550A US 2638179 A US2638179 A US 2638179A
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drying
capsule
moisture
gelatin
agent
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US137045A
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Edward M Yard
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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K9/00—Medicinal preparations characterised by special physical form
    • A61K9/48—Preparations in capsules, e.g. of gelatin, of chocolate
    • A61K9/4841—Filling excipients; Inactive ingredients
    • A61K9/485—Inorganic compounds
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61J—CONTAINERS SPECIALLY ADAPTED FOR MEDICAL OR PHARMACEUTICAL PURPOSES; DEVICES OR METHODS SPECIALLY ADAPTED FOR BRINGING PHARMACEUTICAL PRODUCTS INTO PARTICULAR PHYSICAL OR ADMINISTERING FORMS; DEVICES FOR ADMINISTERING FOOD OR MEDICINES ORALLY; BABY COMFORTERS; DEVICES FOR RECEIVING SPITTLE
    • A61J3/00—Devices or methods specially adapted for bringing pharmaceutical products into particular physical or administering forms
    • A61J3/07—Devices or methods specially adapted for bringing pharmaceutical products into particular physical or administering forms into the form of capsules or similar small containers for oral use
    • A61J3/071—Devices or methods specially adapted for bringing pharmaceutical products into particular physical or administering forms into the form of capsules or similar small containers for oral use into the form of telescopically engaged two-piece capsules
    • A61J3/072—Sealing capsules, e.g. rendering them tamper-proof
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B5/00—Drying solid materials or objects by processes not involving the application of heat
    • F26B5/16—Drying solid materials or objects by processes not involving the application of heat by contact with sorbent bodies, e.g. absorbent mould; by admixture with sorbent materials
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S220/00—Receptacles
    • Y10S220/34—Anti-tamper pharmaceutical capsules, e.g. tamper indicating or resistant

Definitions

  • This invention relates to drying agents and e is directed particularly to agents having a prolonged and controlled drying action.
  • dehydrating or desiccating agents are known but they are not generally presented in a form which permits them to be added directly to material such as table salt, chemicals or drugs for removing excess moisture therefrom. Furthermore, most drying agents act vigorously when first exposed to the atmosphere but soon become spent or saturated so that their effectiveness is short-lived and varies greatly in intensity.
  • One of the objects of the present invention is to provide a novel type of drying agent presenting an exposed surface which is impermeable to air but which is capable of absorbing moisture.
  • Another object of the invention is to provide a novel drying agent which is characterized by its prolonged and moderate action.
  • a specific object of the invention is to provide a drying agent having an outer exposed surface composed of gelatin.
  • the drying agents of the present invention consist essentially of an inner desiccating agent and an outer container or covering which is capable of absorbing moisture from the air or material with which it is in contact whereby the desiccating agent enclosed within the outer em closure or covering serves to extract the moisture from the covering rather than from the atmosphere or material being treated.
  • the activity of the drying agent is dependent primarily upon the water absorbing and transmitting characteristics of the outer cover rather than upon the action of the enclosed desiccant whereas the action of the inner desiccating agent is controlled and limited and its life is materially prolonged.
  • the drying effect is maintained relatively constant over long periods of time, and excessive drying is avoided. At the same time, contamination and chemical reaction between the drying agent and the material being treated is avoided.
  • any desiccating agent may be used but for greater convenience the desiccating agent should be in the form of a granular or powdered material.
  • the preferred materials of this character are silica gel, lime, activated alumina oxide, calcium chloride, phosphorous pentoxide, and activated carbon.
  • dehydrating agents selected may be employed but it is generally preferable for the desiccant to retain a granular form until exhausted in order to avoid contamination of the material being treated in the event the covering material should become softened or split when allowed to remain in contact with the material being dried after its activity has expired.
  • the desiccant selected for use is enclosed within a container, capsule or coating of material which is preferably inert chemically and impermeable to air but which is capable of absorbing or transmitting moisture therethrough from the air or material with which it comes in contact.
  • a preferred enclosing material is gelatin which may be in the form of a capsule, a closed container, or an adhering film.
  • other enclosing materials may be used such as casein, glue, incompletely polymerized glyptal or other water absorbing or moisture permeable synthetic resins, uncoated cellophane and the like.
  • a most convenient form of drying agent embodying the present invention consists of a gelatin capsule embodying the sections 2 and 4 which are positioned in telescoping relation so as to form an enclosure in which the desiccating agent, such as granular activated alumina 6, is enclosed.
  • the sections of the capsule may be sealed as shown at 8 by the application of glue, resin petroleum jelly, or other sealing compositions.
  • glue glue, resin petroleum jelly, or other sealing compositions.
  • Capsules of the type described and shown may conveniently be placed in containers for maintaining a dry atmosphere wherever desired.
  • one or two capsules may be placed in a drawer or box containing postage stamps, labels, photographic paper or the like. They may also be placed in gun cases or tool chests to prevent rusting or in linen closets or drawers to prevent the mildewing of fabrics. Since the capsule form of the present invention is particularly clean, neat and readily handled its uses are unlimited. Moreover, it can be produced, stored and shipped easily and can be preserved in unafiected condition for long periods of time in sealed bottles or vacuum containers.
  • the desiccating agent When applied to a material for drying purposes the desiccating agent itseli does not come into direct contact with the salt or chemical or sift out of the capsule so as to. contaminate or react with the material to be dried. Moreover, the desiccating agent does not come into direct contact with moisture carried by the air or the material being treated.
  • the outer gelatin or resinous capsule is relatively inert chemically so that there is no danger of chemical reaction be tween the enclosure and the material to which the capsules are added.
  • the capsules may be made suiilciently large so that they will not shake from a salt shaker or become lost in a container of powdered or granular material. When exhausted they can be separated easily from the chemical or material and other capsules substituted therefor.
  • the gelatin continues to absorb moisture from the air or material in contact therewith as long as the silica gel or other desiccating agent Within the capsule remains active and continues to withdraw moisture from the gelatin enclosure.
  • the action of the enclosed desiccating agent is limited or controlled and its effectiveness is niaterially prolonged since a limited but appreciable drying action. can be maintained for long periods of time and all danger of excessive drying out ,of the product being treated is avoided.
  • the thickness and composition of the enclosing material employed may of course be varied and the effectiveness and life of the drying agent can thus be controlled so as to afiord a limited drying action for long periods of time or a greater drying action over a more limited period.
  • Thin gelatin capsules containing silica gel serve to maintain a much drier atmosphere, for example, than do capsules of greater thickness containing calcium chloride.
  • the drying agents embodying the present invention can therefore be produced so as to maintain the most desirable atmosphere or condition for the preservation or treatment of any particular material.
  • enclosures formed of gelatin tend to become softer and more pervious to moisture after prolonged exposure to a moist atmosphere.
  • the shielding effect of the enclosing material therefore tends to be reduced as the activity of the desiccating agent becomes less and as a result the continued drying effect is more nearly constant throughout the life of the product.
  • the granules may be enclosed in a sealed bag or package of any desired form, shape and size so as to be hung or placed in a closet, drawer, reaction chamber or elsewhere.
  • the drying agent may consist of granules of a desiccating agent coated with a film of gelatin or other impervious and inert water absorbing material.
  • the desiccating agent appears as a granule H) having a surface coating consisting of a film !Z of absorption limiting ma.-
  • F terial such as gelatin or water absorbing resinous material.
  • Drying agents of this character can be added to alcohol, gasoline, or other liquids to be dried and. in which the coating material is insoluble.
  • products embodying the present invention may be used in drying towers and condense-rs and employed elsewhere in carrying out chemical reactions or for producing or preserving liquids with a minimum moisture content.
  • a drying agent consisting of a gelatin capsule containing a desiccating material.
  • a drying agent consisting of a gelatin capsule containing silica gel.

Description

May 12, 1953 1 1;... v a I E. M/YARD DRYING CAPSULE Filed Jan. 6, 1950 INVENTOR. [Jam/id M- Yam Patented May 12, 1953 UNITED STATES PATENT OFFICE DRYING CAPSULE Edward M. Yard, Trenton, N. J.
Application January 6, 1950, Serial No. 137,045
2 Claims. (o1. 1S34.8)
This invention relates to drying agents and e is directed particularly to agents having a prolonged and controlled drying action.
Many types of dehydrating or desiccating agents are known but they are not generally presented in a form which permits them to be added directly to material such as table salt, chemicals or drugs for removing excess moisture therefrom. Furthermore, most drying agents act vigorously when first exposed to the atmosphere but soon become spent or saturated so that their effectiveness is short-lived and varies greatly in intensity.
In accordance with the present invention these objections to prior drying agents are overcome and a product is provided which can be placed directly in contact with salt, chemicals or other substances to be dried. Products embodying the present invention can be conveniently handled and they are characterized by a prolonged and moderated drying action; These advantages are attained by enclosing desiccating agents, which may be very vigorous in their action, within a capsule, closure or a coating of an air impermeable, moisture transmitting material such as gelatin, uncoated cellophane or incompletely polymerized and moisture absorbing resinous material. In this way the desiccating agent is shielded from direct contact with air or the material to be dried but moisture is absorbed from the material by the enclosing moisture transmitting cover and is in turn absorbed from the cover by the desiccating agent.
One of the objects of the present invention is to provide a novel type of drying agent presenting an exposed surface which is impermeable to air but which is capable of absorbing moisture.
Another object of the invention is to provide a novel drying agent which is characterized by its prolonged and moderate action.
A specific object of the invention is to provide a drying agent having an outer exposed surface composed of gelatin.
These and other objects and features of the present invention will appear from the following description thereof in which reference is made to the figures of the accompanying drawing and to specific compositions which represent typical and preferred products.
The drying agents of the present invention consist essentially of an inner desiccating agent and an outer container or covering which is capable of absorbing moisture from the air or material with which it is in contact whereby the desiccating agent enclosed within the outer em closure or covering serves to extract the moisture from the covering rather than from the atmosphere or material being treated. In this way the activity of the drying agent is dependent primarily upon the water absorbing and transmitting characteristics of the outer cover rather than upon the action of the enclosed desiccant whereas the action of the inner desiccating agent is controlled and limited and its life is materially prolonged. Moreover, the drying effect is maintained relatively constant over long periods of time, and excessive drying is avoided. At the same time, contamination and chemical reaction between the drying agent and the material being treated is avoided.
Substantially any desiccating agent may be used but for greater convenience the desiccating agent should be in the form of a granular or powdered material. Among the preferred materials of this character are silica gel, lime, activated alumina oxide, calcium chloride, phosphorous pentoxide, and activated carbon. These and other dehydrating agents selected may be employed but it is generally preferable for the desiccant to retain a granular form until exhausted in order to avoid contamination of the material being treated in the event the covering material should become softened or split when allowed to remain in contact with the material being dried after its activity has expired.
The desiccant selected for use is enclosed within a container, capsule or coating of material which is preferably inert chemically and impermeable to air but which is capable of absorbing or transmitting moisture therethrough from the air or material with which it comes in contact. A preferred enclosing material is gelatin which may be in the form of a capsule, a closed container, or an adhering film. However, other enclosing materials may be used such as casein, glue, incompletely polymerized glyptal or other water absorbing or moisture permeable synthetic resins, uncoated cellophane and the like.
As shown in Fig. 1, a most convenient form of drying agent embodying the present invention consists of a gelatin capsule embodying the sections 2 and 4 which are positioned in telescoping relation so as to form an enclosure in which the desiccating agent, such as granular activated alumina 6, is enclosed. If desired, the sections of the capsule may be sealed as shown at 8 by the application of glue, resin petroleum jelly, or other sealing compositions. However, it is found in actual practice that when the capsale is formed of gelatin and exposed to moist air,
3 the sections of the capsule soon soften and become welded to each other so as to form a sealed enclosure for the activated alumina without the application of any separate or added sealing material.
Capsules of the type described and shown may conveniently be placed in containers for maintaining a dry atmosphere wherever desired. Thus for example, one or two capsules may be placed in a drawer or box containing postage stamps, labels, photographic paper or the like. They may also be placed in gun cases or tool chests to prevent rusting or in linen closets or drawers to prevent the mildewing of fabrics. Since the capsule form of the present invention is particularly clean, neat and readily handled its uses are unlimited. Moreover, it can be produced, stored and shipped easily and can be preserved in unafiected condition for long periods of time in sealed bottles or vacuum containers.
When applied to a material for drying purposes the desiccating agent itseli does not come into direct contact with the salt or chemical or sift out of the capsule so as to. contaminate or react with the material to be dried. Moreover, the desiccating agent does not come into direct contact with moisture carried by the air or the material being treated. The outer gelatin or resinous capsule is relatively inert chemically so that there is no danger of chemical reaction be tween the enclosure and the material to which the capsules are added. At the same time, the capsules may be made suiilciently large so that they will not shake from a salt shaker or become lost in a container of powdered or granular material. When exhausted they can be separated easily from the chemical or material and other capsules substituted therefor. The gelatin continues to absorb moisture from the air or material in contact therewith as long as the silica gel or other desiccating agent Within the capsule remains active and continues to withdraw moisture from the gelatin enclosure. In this Way the action of the enclosed desiccating agent is limited or controlled and its effectiveness is niaterially prolonged since a limited but appreciable drying action. can be maintained for long periods of time and all danger of excessive drying out ,of the product being treated is avoided. The thickness and composition of the enclosing material employed may of course be varied and the effectiveness and life of the drying agent can thus be controlled so as to afiord a limited drying action for long periods of time or a greater drying action over a more limited period. Thin gelatin capsules containing silica gel serve to maintain a much drier atmosphere, for example, than do capsules of greater thickness containing calcium chloride. The drying agents embodying the present invention can therefore be produced so as to maintain the most desirable atmosphere or condition for the preservation or treatment of any particular material.
It is also found in practice that enclosures formed of gelatin, for example, tend to become softer and more pervious to moisture after prolonged exposure to a moist atmosphere. The shielding effect of the enclosing material therefore tends to be reduced as the activity of the desiccating agent becomes less and as a result the continued drying effect is more nearly constant throughout the life of the product.
Instead of using enclosures in the form of capsules the granules may be enclosed in a sealed bag or package of any desired form, shape and size so as to be hung or placed in a closet, drawer, reaction chamber or elsewhere.
If desired for use in chemical reactions the drying agent may consist of granules of a desiccating agent coated with a film of gelatin or other impervious and inert water absorbing material. Thus as shown in Fig. 2 the desiccating agent appears as a granule H) having a surface coating consisting of a film !Z of absorption limiting ma.-
F terial such as gelatin or water absorbing resinous material.
Drying agents of this character can be added to alcohol, gasoline, or other liquids to be dried and. in which the coating material is insoluble.
. Thus products embodying the present invention may be used in drying towers and condense-rs and employed elsewhere in carrying out chemical reactions or for producing or preserving liquids with a minimum moisture content.
The present invention is thus capable of many changes in form and composition and will vary with different applications and uses thereof. It should t erefore be understood that the particular embodiments of the invention shown in the drawing and described above are intended to be illustrative only and are designed to indicate the nature of the present invention rather than to limit the scope thereof.
I claim:
1. A drying agent consisting of a gelatin capsule containing a desiccating material.
2. A drying agent consisting of a gelatin capsule containing silica gel.
EDWARD M. YARD.
References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 2,314,527 Taylor Mar. 23, 1943 2,578,324; Southwick Dec. 11, 1951 OTHER REFERENCES Activated carbon, Lesser, The Drug and Cosmetic Industry, 51, 2, August 1942, pages 152-155.

Claims (1)

1. A DRYING AGENT CONSISTING OF A GELATIN CAPSULE CONTAINING A DESICCATING MATERIAL.
US137045A 1950-01-06 1950-01-06 Drying capsule Expired - Lifetime US2638179A (en)

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Cited By (38)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2765046A (en) * 1953-03-11 1956-10-02 Rondholz Fritz Air purifying device
US2781864A (en) * 1952-12-27 1957-02-19 Jahn Fluid separation process
US2837881A (en) * 1952-12-13 1958-06-10 Lawrence A Schneider Encapsulated product and method and apparatus for making same
US2838795A (en) * 1953-01-12 1958-06-17 Harry A Lockwood Method and apparatus for forming a desiccator capsule
US2842223A (en) * 1955-12-22 1958-07-08 David M Zall Desiccant material
US2895603A (en) * 1957-01-15 1959-07-21 Freeman Chemical Corp Use of cellular material in packaging articles
US2994404A (en) * 1959-04-28 1961-08-01 Richard E Schifferly Moisture absorbing device
US3063558A (en) * 1959-11-13 1962-11-13 Lesser Mortimer Process of treating dry cleaning solvents
US3315447A (en) * 1964-10-23 1967-04-25 Vincent D Meier Water repellant dehumidifier
US3421282A (en) * 1963-09-28 1969-01-14 Daiichi Kagaku Yakuhin Co Ltd Method for obtaining capsules having oily drugs closed therein
US4749392A (en) * 1985-12-03 1988-06-07 Kaken Pharmaceutical Co., Ltd. Dehumidifying material
US5308665A (en) * 1989-02-28 1994-05-03 Baxter Diagnostics Inc. Impurity scavenger pillow
US5551557A (en) * 1994-10-25 1996-09-03 Convey, Inc. Efficient method and apparatus for establishing shelf-life of getters utilized within sealed enclosures
US5879527A (en) * 1995-05-10 1999-03-09 Dragerwerk Aktiengesellschaft Filter for an electrochemical measuring cell
US5911937A (en) * 1995-04-19 1999-06-15 Capitol Specialty Plastics, Inc. Desiccant entrained polymer
WO1999061856A1 (en) 1998-05-29 1999-12-02 Capitol Specialty Plastics, Inc. Modified polymers having controlled transmission rates
WO1999061855A1 (en) 1998-05-29 1999-12-02 Capitol Specialty Plastics, Inc. Modified polymers having controlled transmission rates
WO1999063288A1 (en) 1998-05-29 1999-12-09 Capitol Specialty Plastics, Inc. Desiccant entrained polymer
US6130263A (en) * 1995-04-19 2000-10-10 Capitol Specialty Plastics, Inc. Desiccant entrained polymer
US6174952B1 (en) 1995-04-19 2001-01-16 Capitol Specialty Plastics, Inc. Monolithic polymer composition having a water absorption material
US6177183B1 (en) 1995-04-19 2001-01-23 Capitol Specialty Plastics, Inc. Monolithic composition having an activation material
US6194079B1 (en) 1995-04-19 2001-02-27 Capitol Specialty Plastics, Inc. Monolithic polymer composition having an absorbing material
US6214255B1 (en) 1995-04-19 2001-04-10 Capitol Specialty Plastics, Inc. Desiccant entrained polymer
US6316520B1 (en) 1995-04-19 2001-11-13 Capitol Specialty Plastics, Inc. Monolithic polymer composition having a releasing material
US6460271B2 (en) 1995-04-19 2002-10-08 Csp Technologies, Inc. Insert having interconnecting channel morphology for aldehyde absorption
US6465532B1 (en) 1997-03-05 2002-10-15 Csp Tecnologies, Inc. Co-continuous interconnecting channel morphology polymer having controlled gas transmission rate through the polymer
US6486231B1 (en) 1995-04-19 2002-11-26 Csp Technologies, Inc. Co-continuous interconnecting channel morphology composition
US20030153457A1 (en) * 2000-06-19 2003-08-14 Yasushi Nemoto Adsorbents, process for producing the same, and applications thereof
US6696002B1 (en) 2000-03-29 2004-02-24 Capitol Security Plastics, Inc. Co-continuous interconnecting channel morphology polymer having modified surface properties
US20040242746A1 (en) * 2001-12-19 2004-12-02 Jon Freedman Thermoplastic composition comprising a CO2 releasing material
US20050056151A1 (en) * 2003-09-11 2005-03-17 Hurley Thomas J. Sorbent capsule
USRE40941E1 (en) * 1995-04-19 2009-10-20 Csp Technologies, Inc. Monolithic polymer composition having a releasing material
US8221705B2 (en) 2007-06-21 2012-07-17 Gen-Probe, Incorporated Receptacles for storing substances in different physical states
WO2013006051A1 (en) * 2011-07-04 2013-01-10 Nederlandse Organisatie Voor Toegepast- Natuurwetenschappelijk Onderzoek Tno Encapsulated water absorbing composition
US20140116444A1 (en) * 2005-09-12 2014-05-01 Abela Pharmaceuticals, Inc. Devices for removal of dimethyl sulfoxide (dmso) or related compounds or associated odors and methods of using same
US20140305000A1 (en) * 2013-04-10 2014-10-16 Wei Ren Systems and Methods For Dewatering Mine Tailings With Water-Absorbing Polymers
US9186297B2 (en) 2005-09-12 2015-11-17 Abela Pharmaceuticals, Inc. Materials for facilitating administration of dimethyl sulfoxide (DMSO) and related compounds
US9839609B2 (en) 2009-10-30 2017-12-12 Abela Pharmaceuticals, Inc. Dimethyl sulfoxide (DMSO) and methylsulfonylmethane (MSM) formulations to treat osteoarthritis

Citations (2)

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Publication number Priority date Publication date Assignee Title
US2314547A (en) * 1940-11-28 1943-03-23 Aviat Corp Starter for internal combustion engines
US2578324A (en) * 1945-09-07 1951-12-11 Shellmar Products Corp Desiccant pouch

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2314547A (en) * 1940-11-28 1943-03-23 Aviat Corp Starter for internal combustion engines
US2578324A (en) * 1945-09-07 1951-12-11 Shellmar Products Corp Desiccant pouch

Cited By (54)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2837881A (en) * 1952-12-13 1958-06-10 Lawrence A Schneider Encapsulated product and method and apparatus for making same
US2781864A (en) * 1952-12-27 1957-02-19 Jahn Fluid separation process
US2838795A (en) * 1953-01-12 1958-06-17 Harry A Lockwood Method and apparatus for forming a desiccator capsule
US2765046A (en) * 1953-03-11 1956-10-02 Rondholz Fritz Air purifying device
US2842223A (en) * 1955-12-22 1958-07-08 David M Zall Desiccant material
US2895603A (en) * 1957-01-15 1959-07-21 Freeman Chemical Corp Use of cellular material in packaging articles
US2994404A (en) * 1959-04-28 1961-08-01 Richard E Schifferly Moisture absorbing device
US3063558A (en) * 1959-11-13 1962-11-13 Lesser Mortimer Process of treating dry cleaning solvents
US3421282A (en) * 1963-09-28 1969-01-14 Daiichi Kagaku Yakuhin Co Ltd Method for obtaining capsules having oily drugs closed therein
US3315447A (en) * 1964-10-23 1967-04-25 Vincent D Meier Water repellant dehumidifier
US4749392A (en) * 1985-12-03 1988-06-07 Kaken Pharmaceutical Co., Ltd. Dehumidifying material
US5308665A (en) * 1989-02-28 1994-05-03 Baxter Diagnostics Inc. Impurity scavenger pillow
US5551557A (en) * 1994-10-25 1996-09-03 Convey, Inc. Efficient method and apparatus for establishing shelf-life of getters utilized within sealed enclosures
US6316520B1 (en) 1995-04-19 2001-11-13 Capitol Specialty Plastics, Inc. Monolithic polymer composition having a releasing material
US6460271B2 (en) 1995-04-19 2002-10-08 Csp Technologies, Inc. Insert having interconnecting channel morphology for aldehyde absorption
USRE40941E1 (en) * 1995-04-19 2009-10-20 Csp Technologies, Inc. Monolithic polymer composition having a releasing material
US5911937A (en) * 1995-04-19 1999-06-15 Capitol Specialty Plastics, Inc. Desiccant entrained polymer
US6486231B1 (en) 1995-04-19 2002-11-26 Csp Technologies, Inc. Co-continuous interconnecting channel morphology composition
US6080350A (en) * 1995-04-19 2000-06-27 Capitol Specialty Plastics, Inc. Dessicant entrained polymer
US6124006A (en) * 1995-04-19 2000-09-26 Capitol Specialty Plastics, Inc. Modified polymers having controlled transmission rates
US6130263A (en) * 1995-04-19 2000-10-10 Capitol Specialty Plastics, Inc. Desiccant entrained polymer
US6174952B1 (en) 1995-04-19 2001-01-16 Capitol Specialty Plastics, Inc. Monolithic polymer composition having a water absorption material
US6177183B1 (en) 1995-04-19 2001-01-23 Capitol Specialty Plastics, Inc. Monolithic composition having an activation material
US6194079B1 (en) 1995-04-19 2001-02-27 Capitol Specialty Plastics, Inc. Monolithic polymer composition having an absorbing material
US6214255B1 (en) 1995-04-19 2001-04-10 Capitol Specialty Plastics, Inc. Desiccant entrained polymer
US6221446B1 (en) 1995-04-19 2001-04-24 Capitol Specialty Plastics, Inc Modified polymers having controlled transmission rates
US5879527A (en) * 1995-05-10 1999-03-09 Dragerwerk Aktiengesellschaft Filter for an electrochemical measuring cell
EP1421991A2 (en) 1996-03-05 2004-05-26 CSP Technologies, Inc. Desiccant entrained polymer
US6465532B1 (en) 1997-03-05 2002-10-15 Csp Tecnologies, Inc. Co-continuous interconnecting channel morphology polymer having controlled gas transmission rate through the polymer
WO1999063288A1 (en) 1998-05-29 1999-12-09 Capitol Specialty Plastics, Inc. Desiccant entrained polymer
WO1999061855A1 (en) 1998-05-29 1999-12-02 Capitol Specialty Plastics, Inc. Modified polymers having controlled transmission rates
EP2273222A1 (en) 1998-05-29 2011-01-12 CSP Technologies, Inc. Modified polymers having controlled transmission rates
WO1999061856A1 (en) 1998-05-29 1999-12-02 Capitol Specialty Plastics, Inc. Modified polymers having controlled transmission rates
US6696002B1 (en) 2000-03-29 2004-02-24 Capitol Security Plastics, Inc. Co-continuous interconnecting channel morphology polymer having modified surface properties
US20030153457A1 (en) * 2000-06-19 2003-08-14 Yasushi Nemoto Adsorbents, process for producing the same, and applications thereof
US6890373B2 (en) * 2000-06-19 2005-05-10 Bridgestone Corporation Adsorbents, process for producing the same, and applications thereof
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