WO2001034024A9 - Marker detection method and apparatus to monitor drug compliance - Google Patents
Marker detection method and apparatus to monitor drug complianceInfo
- Publication number
- WO2001034024A9 WO2001034024A9 PCT/US2000/030692 US0030692W WO0134024A9 WO 2001034024 A9 WO2001034024 A9 WO 2001034024A9 US 0030692 W US0030692 W US 0030692W WO 0134024 A9 WO0134024 A9 WO 0134024A9
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- marker
- patient
- medication
- breath
- analysis
- Prior art date
Links
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/41—Detecting, measuring or recording for evaluating the immune or lymphatic systems
- A61B5/411—Detecting or monitoring allergy or intolerance reactions to an allergenic agent or substance
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/08—Detecting, measuring or recording devices for evaluating the respiratory organs
- A61B5/082—Evaluation by breath analysis, e.g. determination of the chemical composition of exhaled breath
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/48—Other medical applications
- A61B5/4833—Assessment of subject's compliance to treatment
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/48—Biological material, e.g. blood, urine; Haemocytometers
- G01N33/483—Physical analysis of biological material
- G01N33/497—Physical analysis of biological material of gaseous biological material, e.g. breath
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- 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
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T436/00—Chemistry: analytical and immunological testing
- Y10T436/10—Composition for standardization, calibration, simulation, stabilization, preparation or preservation; processes of use in preparation for chemical testing
- Y10T436/104165—Lipid, cholesterol, or triglyceride standard or control
-
- 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
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T436/00—Chemistry: analytical and immunological testing
- Y10T436/13—Tracers or tags
Definitions
- the present invention relates to marker detection, in the form of odors or the like, to monitor drug compliance, and, more particularly, to a method and apparatus for the detection of markers wherein such markers are detectable either directly from the medication itself or from an additive combined with the medication and are detected upon exhalation after medication is taken by a patient.
- Non-compliance of patients to drug regimens prescribed by their physicians results in excessive healthcare costs estimated to be around $100 billion per year through lost work days, increased cost of medical care, higher complication rates, as well as drug wastage.
- Non- compliance refers to the failure to take the prescribed dosage at the prescribed time which results in undermedication or overmedication. In a survey of 57 non-compliance studies, non- compliance ranged from 15% to as high as 95% in all study populations, regardless of medications, patient population characteristics, drug being delivered or study methodology [Greenberg RN: Overview of patient compliance with medication dosing: A literature review. Clinical Therapeutics, 6(5):592-599, 1984].
- a cost-effective, but difficult to administer, program has been developed in seven locations around the nation to combat this serious threat to the American populace. It involves direct observation of all drug delivery by trained professionals (directly observed therapy: DOT) but is impractical for large scale implementation. Many techniques are also invasive, e.g., blood sampling.
- the present invention solves the needs in the art by providing a method and apparatus for monitoring drug compliance by detecting markers, such as odors, upon exhalation by a patient after medication is taken, wherein such markers result either directly from the medication itself or from an additive combined with the medication.
- markers such as odors
- the invention preferably utilizes electronic sensor technology, such as the commercial devices referred to as “artificial noses" or “electronic nosesJ to non-invasively monitor compliance.
- the invention further includes a reporting system capable of tracking compliance (remote or proximate) and providing the necessary alerts.
- marker substances as a measure of patient compliance by methods including, but not limited to, sensor technology (e.g., silicon chip technology) to non-invasively monitor compliance of patients to prescribed drug regimens.
- sensor technology e.g., silicon chip technology
- Figure 1 shows a gas sensor chip which may be utilized as the sensor for the present invention.
- Figure 2 shows an overview of the preferred steps of the method of the present invention.
- Figure 3 shows the patient taking medication with a marker which is released for detection.
- Figure 4 shows the preferred marker detection system utilizing sensor technology which can communicate with a computer for proximate or remote monitoring.
- the present invention provides a method and apparatus for monitoring drug compliance by detecting markers released for detection upon exhalation after medication is taken by a patient.
- the detected markers are derived either directly from the medication itself or from a novel additive combined with the medication (referred to herein as "markers").
- markers preferably include olfactory markers (odors) as well as other substances and compounds which may be detectable by various methods, as described in more detail herein.
- the marker or marker substance is defined as a substance added to the medication or taken with the medication (i.e., as the coating on a pill) that is detected by means of its physical or chemical properties as an indication that the patient has taken the medication. This includes the use of the medication itself as its own marker.
- the marker substance is then detected by devices including but not limited to electronic noses, spectrophotometers to detect the marker's IR, UV, or visible absorbance or fluorescence, or mass spectrometers to detect the marker's characteristic mass display.
- Gas Sensor Technology The invention preferably utilizes gas sensor technology, such as the commercial devices referred to as “artificial noses" or “electronic noses,” to non-invasively monitor compliance.
- Electronic noses have been used mostly in the food, wine and perfume industry where their sensitivity makes it possible to distinguish between grapefruit oil and orange oil and identify spoilage in perishable foods before the odor is evident to the human nose. There has been little medical-based research and application; however, recent examples demonstrate the power of this non-invasive technique.
- gas chromatography which consists of a method of selective detection by separating the molecules of gas compositions, may be used as a way of monitoring markers.
- detection contemplated by the present invention includes transcutaneous/transdermal detection, such as that disclosed in U.S. PatentNo. 5,771, 890 to Tamada and U.S. Patent No. 5,954,685 to Tierney and the commercial device utilizing reverse iontophoresis sold by Cygnus, Inc. under the trademark "GlucoWatch®,” the disclosures of which are incorporated herein by reference.
- Marker detection of the present invention through body fluids as known in the art such as sweat, saliva, urine, mucous, hair, nails, tears, and other bodily discharge are also contemplated herein (e.g., via ion exchange dipstick in combination with stain-producingagent, filtering fluids and treating with binding agent and reagents for color reaction, spectrophotometers, and the like).
- marker substances include, but are not limited to, semiconductive gas sensors, mass spectrometers, IR or UV or visible or fluorescence spectrophotometers.
- the marker substances change the electrical properties of the semiconductors by making their electrical resistance vary, and the measurement of these variations allows one to determine the concentration of marker substances.
- the conductive-polymergas-sensors (also referred to as "chemoresistors”) have a film made of a conductive polymer sensitive to the molecules of odorous substances. On contact with the molecules, the electric resistance of the sensors change and the measurement of the variation of this resistance enables the concentration of the odorous substances to be determined.
- An advantage of this type of sensor is that it functions at temperatures close to room temperature. One can also obtain, according to the chosen conductive polymer, different sensitivities for detecting different odorous substances.
- Polymeric gas sensors can be built into an array of sensors, where each sensor is designed to respond differently to different gases and augment the selectivity of the odorous substances.
- the surface-acoustic-wave (SAW) gas-sensors generally include a substrate with piezoelectric characteristics covered by a polymer coating which is able to selectively absorb the odorous substances. The variation of the resulting mass leads to a variation of its resonant frequency. This type of sensor allows for very good mass-volume measures of the odorous substances.
- the substrate is used to propagate a surface acoustic wave between sets of interdigitated electrodes.
- the chemoselective material is coated on the surface of the transducer. When a chemical analyte interacts with a chemoselective material coated on the substrate, the interaction results in a change in the SAW properties such as the amplitude of velocity of the propagated wave.
- SAW devices are described in numerous patents and publications, includingU.S. PatentNo.4,312.228to Wohltjen and U.S. PatentNo. 4,895,017 to Pyke, and Groves WA, et al.: Analyzing organic vapors in exhaled breath using surface acoustic wave sensor array with preconcentration: Selection and characterization of the preconcentrator adsorbent, Analytica Chimica Ada 371 (1988) 131-143, all of which are incorporated herein by reference.
- BAW bulk acoustic wave
- IME interdigitated microelectrode
- OW optical waveguide
- the operating performance of a chemical sensorthat uses a chemoselectivefilm coating is greatly affected by the thickness, uniformity and composition of the coating.
- increasingthe coating thickness has a detrimental effect on the sensitivity. Only the portion of the coating immediately adjacent to the transducer substrate is sensed by the transducer. If the polymer coating is too thick, the sensitivity of the SAW device to record changes in frequency will be reduced.
- These outer layers of coating material compete for the analyte with the layers of coating being sensed and thus reduce the sensitivity of the biosensor. Uniformity of the coating is also a critical factor in the performance of a sensor that uses a chemoselectivecoating since changes in average surface area greatly effect the local vibrational signature of the SAW device.
- films should be deposited that are flat to within 1 nm with a thickness of 15 - 25 nm.
- the coating it is important not only that the coating be uniform and reproducible from one device to another, so that a set of devices will all operate with the same sensitivity, but also that the coating on a single device be uniform across the active area of the substrate. If a coating is non-uniform, the response time to analyte exposure and the recovery time after analyte exposure are increased and the operating performance of the sensor is impaired. The thin areas of the coating respond more rapidly to an analyte than the thick areas. As a result, the sensor response signal takes longer to reach an equilibrium value, and the results are less accurate than they would be with a uniform coating.
- PLD pulsed laser deposition
- PLASF Pulsed Laser Assisted Surface Functionalization
- the present invention will determine if a patient has taken the prescribed drug at the appropriate time and at the prescribed dosage by monitoring and analyzing the exhaled gases with the electronic nose.
- the device of the present invention is designed so that patients can exhale via the mouth or nose directly into the device.
- the device is designed to detect the presence of medications and/or harmless olfactory markers added to medication (discussed hereinafter).
- Another preferred electronic nose technology of the present invention comprises an array of polymers, for example, 32 different polymers, each exposed to a marker (e.g., odor). Each of the 32 individual polymers swells differently to the odor creating a change in the resistance of that membrane and generating an analog voltage in response to that specific odor ("signature").
- the normalized change in resistance can then be transmitted to a processor to identify the type, quantity, and quality of the odor based on the pattern change in the sensor array.
- the unique response results in a distinct electrical fingerprint that is used to characterize the odor.
- the pattern of resistance changes of the array is diagnostic of the sample, while the amplitude of the pattern indicates the concentration of the sample.
- the responses of the electronic nose to specific odors can be fully characterized using a combination of conventional gas sensor characterization techniques.
- the sensor can be attached to a computer. Marker analysis results can be displayed on the computer screen, stored, transmitted, etc.
- a data analyzer can compare a pattern of response to previously measured and characterized responses from known markers. The matching of those patterns can be performed using a number of techniques, including neural networks.
- a neural network By comparing the analog output from each of the 32 polymers to a "blank" or control odor, for example, a neural network can establish a pattern which is unique to that marker and subsequently learns to recognize that marker.
- the particular resistor geometries are selected to optimize the desired response to the particular marker being sensed.
- the electronic nose of the present invention is preferably a self- calibrating polymer system suitable for liquid or gas phase biological solutions for a variety of medications simultaneously.
- the electronic nose of the present invention might include integrated circuits (chips) manufactured in a modified vacuum chamber for Pulsed Laser Deposition of polymer coatings. It will operate the simultaneous thin-film deposition wave detection and obtain optimum conditions for high sensitivity of SAW sensors. The morphology and microstructure of biosensor coatings will be characterized as a function of process parameters.
- the electronic nose used in the present invention will preferably be modified so that patients can exhale directly into the device.
- a mouthpiece or nosepiece will be provided for interfacing a patient with the device to readily transmit the exhaled breath to the sensor (See, e.g., U.S. Patent No. 5,042,501 ).
- the output from the neural network of the modified electronicnose should be similar when the same patient exhales directly into the device and when the exhaled gases are allowed to dry before they are sampled by the electronic nose.
- the humidity in the exhaled gases represents a problem for certain electronic nose devices (albeit not SAW sensors) which only work with "dry" gases.
- the present invention will adapt such electronic nose technology so that a patient can exhale directly into the device with a means to dehumidify the samples. This will be accomplished by including a commercial dehumidifier or a heat moisture exchanger (HME), a device designed to prevent desiccation of the airway during ventilation with dry gases.
- HME heat moisture exchanger
- the patient may exhale through their nose which is an anatomical, physiological dehumidifier to prevent dehydration during normal respiration.
- the drug and/or the additive or coating can "coat" or persist in the mouth, esophagus and/or stomach upon ingestion and be detected upon exhalation (similar to the taste or flavor that remains in the mouth after eating a breath mint).
- the olfactory coating or additive may react in the mouth or stomach with acid or enzymes to produce or liberate the marker that can then be detected with a "burp" or upon exhalation.
- the drug and/or marker additive can be absorbed in the gastrointestinaltract and be excreted in the lungs (i.e.
- a non-toxic marker that can be detected by its chemical or physical properties
- added to the medication itself or to the pill or its coating or to the solution of suspension of the medication or taken separately in some form with the medication will provide a method to determine if the drug was taken as prescribed. While detection is possible by all three mechanisms, drug excretion from the lungs after oral ingestion usually takes longer. Rapid detection after ingestion is preferable so that the patient does not have to wait to perform the test after taking the drug.
- the preferred embodiment of the invention detects the presence of that drug almost immediately in the exhaled breath of the patient (or possibly by requesting the patient to deliberately produce a burp) using the electronic nose.
- Certain drug compositions might not be detectable in the exhaled breath.
- Others might have a coating to prevent the medication from dissolving in the stomach.
- a non-toxic olfactory marker e.g., volatile organic vapors
- a non-toxic olfactory marker added to the coating of the pill or in a separate fast dissolving compartment in the pill or the solution (if the medication is in liquid or suspension form) will provide a method to determine if the drug was taken as prescribed.
- the marker substance will coat the oral cavity or esophagus or stomach for a short while and be exhaled in the breath or in a burp.
- the electronic nose will determine their presence as well as their concentration.
- the markers can be applied as coatings or physically combined or added to the medication. Markers can also be included with liquid medications and inhalers or other dosing means.
- the electronic nose of the present invention will identify predetermined non-toxic olfactory markers as well as those drugs that can be directly detected without olfactory markers. The electronic noses will not only detect different drugs but also drug concentrations.
- the electronic nose will be used to identify a baseline marker spectrum for the patient prior to ingestion of the medication, if necessary.
- This will prove beneficial for the detection of more than one drug if the patient is required to ingest more than one drug at a time and possible interference from different foods and odors in the stomach, mouth, esophagus and lungs.
- the substances referred to as "olfactory markers" herein are detected by their physical and/or chemical properties, which does not preclude using the medication itself as its own marker.
- Preferable markers include, but are not limited to, the following: trans-Anethole (1 - methoxy-4-propenyl benzene)- anise; Benzaldehyde (benzoic aldehyde) - bitter almond; Butyl isobutyrate (n-butyl 2, methyl propanoate) - pineapple; Cinnamaldehyde (3-phenylpropenal) - cinnamon; Citral (2-trans-3, 7-dimenthyl-2, 6-octadiene-l -al) - citrus; Menthol ( l -methyl-4- isopropylcyclohexane-3-ol) - menthol; and alpha-Pinene (2, 6, 6-trimethylbicyclo-(3J J )-2- heptene) - pine.
- markers are preferred since they are used in the food industry as flavor ingredients and are permitted by the Food and Drug Administration as indicated in the Code of Federal Regulations, Chapter 21 , et. sec. Moreover, these markers are classified "generally recognized as safe” by the Flavor and Extract Manufacturer's Association. These markers are also all natural products and single individual compounds, not mixtures, to enhance detection and represent a variety of chemical structures to enhance differentiation in detection devices. They are generally poorly soluble in water which enhances their volatility and detection in the breath. Obviously, the number of marker substances that could be used is vast (Reference:
- the medication e.g., capsules, tablets, gel-caps
- the medication is coated with a known marker substance along with rapidly dissolving glucose and/or sucrose (i.e., the pill is coated with the marker in air-flocculated sugar crystals).
- the device will utilize predetermined signature profiles of specific drugs, classes of drugs, and/or selected markers. The markers could be used for specific drugs or for a class of drugs.
- a patient may be taking an antibiotic, an antihypertensive agent, and an anti-reflux drug.
- One marker could be used for antibiotics as a class, or for subclasses of antibiotics, such as erythromycins.
- Another marker could be used for antihypertensives as a class, or for specific subclasses of antihypertensives, such as calcium channel blockers. The same would be true for the anti-reflux drug.
- combinations of marker substances could be used allowing a rather small number of markers to specifically identify a large number of medications.
- the drugs or drugs coated with selected markers When the drugs or drugs coated with selected markers are taken ( Figure 2), the drugs are dissolved in the mouth (or digested in the stomach, transmitted to the lungs, etc.).
- the electronic nose can then detect the marker from the drugs or drugs coated with selected markers when the patient exhales ( Figures 2 - 4) to confirm that the medication was taken on a dose by dose basis.
- the electronic nose can record and/or transmit the data sensed from the patient's breath for monitoring purposes. While the primary goal of the invention is to improve and document medication compliance in motivated, responsible(albeitoccasionallyforgetful) individuals, there is a small minority of patients who intentionally do not take their medications, or whose failure to take their medication can result in a public health crisis (i.e. the spread of drug resistant tuberculosis).
- a pressure sensor can be incorporated into the detector to document that the patient is actually exhaling through the device.
- a flow restrictor can be incorporated which increases the resistance to exhalation.
- Pulmonary delivery of medications is well known, especially for conditions such as asthma and chronic obstructive pulmonary disease.
- medication i.e. corticosteroids, bronchodilators, anticholenergics, etc.
- medication i.e. corticosteroids, bronchodilators, anticholenergics, etc.
- MDIs Metered dose inhalers
- nebulizers are commonly used to deliver medication by this route.
- dry powder inhalers have become increasingly popular, as they do not require the use of propellants such as CFCs.
- Propellants have been implicated in worsening asthma attacks, as well as depleting the ozone layer. Dry power inhalers are also being used for drugs that were previously given only by other routes, such as insulin, peptides, and hormones. Olfactory markers can be added to these delivery systems as well. Since the devices are designed to deliver medication by the pulmonary route, the sensor array can be incorporated into the device and the patient need only exhale back through the device for documentation to occur.
- the electronic nose and/or computercommunicatingtherewith can also notify the medical staff and/or the patient to any irregularities in dosing, dangerous drug interactions, and the like.
- This system will enable determination as to whether a patient has taken the prescribed drug at the appropriate time and at the prescribed dosage.
- the device could also alert the patient that it is time to take their medications.
- a further embodiment of the invention includes a communications device in the home (or other remote location) that will be interfaced to the electronic nose.
- the home communicationsdevice will be able to transmit immediately or at prescribed intervals directly or over a standard telephone line (or other communication means) the data collected by the compliance monitoring device.
- the communication of the data will allow the physician to be able to remotely verify if the patient took the prescribed drug at the prescribed time and dose.
- the data transmitted from the home can also be downloaded to a computer where the prescribed drug regimen is stored in a database, and any deviations within limits from the prescribed drug regimen would be automaticallyflagged (e.g., alarm) so that a home care nurse could telephone the patient and inquire about the reasons for deviating from the prescribed drug regimen.
- the marker detection method of the present invention is intended to cover detection not only through the exhalation by a patient with a device utilizing electronic nose technology, but also other suitable technologies, such as gas chromatography, transcutaneous/transdermal detection, semiconductive gas sensors, mass spectrometers, IR or UV or visible or fluorescence spectrophotometers.
- the invention also includes marker detection not only through a patient's exhaled breath, but also through sweat, saliva, urine, mucous, hair, nails, tears, and other bodily discharge of the patient.
Abstract
Description
Claims
Priority Applications (9)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP00978427A EP1227753B1 (en) | 1999-11-08 | 2000-11-08 | Marker detection apparatus to monitor drug compliance |
AU15893/01A AU777817B2 (en) | 1999-11-08 | 2000-11-08 | Marker detection method and apparatus to monitor drug compliance |
AT00978427T ATE515229T1 (en) | 1999-11-08 | 2000-11-08 | DEVICE FOR DETECTING A MARKER FOR MONITORING COMPLIANCE TO MEDICINAL THERAPY |
NZ518740A NZ518740A (en) | 1999-11-08 | 2000-11-08 | Marker detection method and apparatus to monitor drug compliance |
MXPA02004618A MXPA02004618A (en) | 1999-11-08 | 2000-11-08 | Marker detection method and apparatus to monitor drug compliance. |
CA2390261A CA2390261C (en) | 1999-11-08 | 2000-11-08 | Marker detection method and apparatus to monitor drug compliance |
JP2001536039A JP4773019B2 (en) | 1999-11-08 | 2000-11-08 | Marker detection method and apparatus for monitoring drug compliance |
HK02106751.4A HK1047396A1 (en) | 1999-11-08 | 2002-09-13 | Marker detection method and apparatus to monitor drug compliance |
AU2005200393A AU2005200393A1 (en) | 1999-11-08 | 2005-01-31 | Marker detection method and apparatus to monitor drug compliance |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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US16425099P | 1999-11-08 | 1999-11-08 | |
US60/164,250 | 1999-11-08 |
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WO2001034024A1 WO2001034024A1 (en) | 2001-05-17 |
WO2001034024A9 true WO2001034024A9 (en) | 2002-05-10 |
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Application Number | Title | Priority Date | Filing Date |
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PCT/US2000/030692 WO2001034024A1 (en) | 1999-11-08 | 2000-11-08 | Marker detection method and apparatus to monitor drug compliance |
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US (1) | US7820108B2 (en) |
EP (1) | EP1227753B1 (en) |
JP (1) | JP4773019B2 (en) |
AT (1) | ATE515229T1 (en) |
AU (2) | AU777817B2 (en) |
CA (1) | CA2390261C (en) |
HK (1) | HK1047396A1 (en) |
MX (1) | MXPA02004618A (en) |
NZ (1) | NZ518740A (en) |
WO (1) | WO2001034024A1 (en) |
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-
2000
- 2000-11-08 CA CA2390261A patent/CA2390261C/en not_active Expired - Lifetime
- 2000-11-08 EP EP00978427A patent/EP1227753B1/en not_active Expired - Lifetime
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- 2000-11-08 AT AT00978427T patent/ATE515229T1/en not_active IP Right Cessation
- 2000-11-08 WO PCT/US2000/030692 patent/WO2001034024A1/en active IP Right Grant
- 2000-11-08 AU AU15893/01A patent/AU777817B2/en not_active Ceased
- 2000-11-08 JP JP2001536039A patent/JP4773019B2/en not_active Expired - Lifetime
- 2000-11-08 NZ NZ518740A patent/NZ518740A/en unknown
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2002
- 2002-09-13 HK HK02106751.4A patent/HK1047396A1/en unknown
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2003
- 2003-11-26 US US10/722,620 patent/US7820108B2/en not_active Expired - Lifetime
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JP2003513694A (en) | 2003-04-15 |
ATE515229T1 (en) | 2011-07-15 |
EP1227753A1 (en) | 2002-08-07 |
JP4773019B2 (en) | 2011-09-14 |
CA2390261A1 (en) | 2002-05-17 |
MXPA02004618A (en) | 2002-09-02 |
CA2390261C (en) | 2014-04-22 |
AU2005200393A1 (en) | 2005-02-24 |
AU777817B2 (en) | 2004-11-04 |
WO2001034024A1 (en) | 2001-05-17 |
EP1227753B1 (en) | 2011-07-06 |
US20040081587A1 (en) | 2004-04-29 |
AU1589301A (en) | 2001-06-06 |
HK1047396A1 (en) | 2003-02-21 |
NZ518740A (en) | 2004-04-30 |
US7820108B2 (en) | 2010-10-26 |
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