CA2116918C - Headed screw construction for use in fixing the position of an intramedullary nail - Google Patents
Headed screw construction for use in fixing the position of an intramedullary nail Download PDFInfo
- Publication number
- CA2116918C CA2116918C CA002116918A CA2116918A CA2116918C CA 2116918 C CA2116918 C CA 2116918C CA 002116918 A CA002116918 A CA 002116918A CA 2116918 A CA2116918 A CA 2116918A CA 2116918 C CA2116918 C CA 2116918C
- Authority
- CA
- Canada
- Prior art keywords
- thread
- head
- shank
- screw
- nut
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 238000010276 construction Methods 0.000 title description 7
- 210000000988 bone and bone Anatomy 0.000 claims description 15
- 230000015572 biosynthetic process Effects 0.000 claims description 11
- 230000004323 axial length Effects 0.000 claims 2
- 230000007423 decrease Effects 0.000 claims 1
- 238000005755 formation reaction Methods 0.000 description 6
- 230000001054 cortical effect Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B23/00—Specially shaped nuts or heads of bolts or screws for rotations by a tool
- F16B23/0084—Specially shaped nuts or heads of bolts or screws for rotations by a tool with a threaded engagement between the head of the bolt or screw and the tool
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
- A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
- A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
- A61B17/84—Fasteners therefor or fasteners being internal fixation devices
- A61B17/86—Pins or screws or threaded wires; nuts therefor
- A61B17/8605—Heads, i.e. proximal ends projecting from bone
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
- A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
- A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
- A61B17/84—Fasteners therefor or fasteners being internal fixation devices
- A61B17/86—Pins or screws or threaded wires; nuts therefor
- A61B17/8625—Shanks, i.e. parts contacting bone tissue
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
- A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
- A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
- A61B17/84—Fasteners therefor or fasteners being internal fixation devices
- A61B17/86—Pins or screws or threaded wires; nuts therefor
- A61B17/8625—Shanks, i.e. parts contacting bone tissue
- A61B17/863—Shanks, i.e. parts contacting bone tissue with thread interrupted or changing its form along shank, other than constant taper
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
- A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
- A61B17/88—Osteosynthesis instruments; Methods or means for implanting or extracting internal or external fixation devices
- A61B17/8875—Screwdrivers, spanners or wrenches
-
- 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
- Y10S606/00—Surgery
- Y10S606/916—Tool for installing or removing orthopedic fastener
Abstract
The invention relates to a screw for fixing an intramedullary nail in position. An external thread on the screw shank is provided over only a part of the length of the shank. The screw head is provided with an external thread having a direction of helical advance which is opposite the direction of helical advance of the screw-shank thread.
Description
21i691~
2370M File 3026 HEADED SCREW CONSTRUCTION FOR USE IN
FIXING THE POSITION OF AN INTRAMEDULLARY NAII'.
round of the Invent»r The present invention relates to a headed screw construction wherein the shank of the screw locates in transverse anchor holes of an intramedullary nail and wherein threads on the shank of the screw are adapted for anchorage in bone.
The use of screw threads to fix or to anchor an intramedullary nail is known from EP 306,709 A2. In that case, an elongate screw is threaded for the entire length of its shank and passes through the intramedullary nail.
Screws having a shank with external threads only over a part of their length are known from U.S. Patent No. 4,463,753.
In that case, the two spaced regions of screw threads on the same shank serve to provide a compressive action, bringing together two fracture-separated parts of a bone. Threaded advance for the respective spaced thread regions is in the same direction, but with differing pitch. This prior art screw has no relation to an intramedullary nail.
Brief Statement of t_he Tnvention The object of the present invention is to provide a screw construction for tixing the position of an intramedullary nail, whar~in tho screw is easily positioned for intramedullary-nail engagement and is easily removable.
The invention achieves this object in a screw construction (a) in which threads for engagement in bone are limited to the shank region near the headed end of the screw, (b) in which the remainder of the shank, i.e., beyond the threads, is unthreaded, and (c) in which the head itself is externally threaded with a direction of thread advance that is opposite to the direction of thread advance on the shank. The unthreaded part of the screw shank is intended for passage through the intramedullary nail, while the threaded region of the shank secures the screw in cortical substance of a bone. Later on, when the screw is to be removed from its threaded anchorage to bane, an internally ~~:1~9:18 threaded nut may be threaded onto the external threads of the head. Once the nut has achieved a limit of head-thread engagement, continued nut rotation in the same direction is operative to drive the shank threads to retract the same from bone engagement. Thus, the screw of the invention can be removed from pinned locating engagement with the intramedullary nail and from threaded engagement to a bone, merely by driving the nut in the direction opposite to the direction of initial shank-screw engagement to the bone.
Admittedly, the retracting direction of screw rotation could also be obtained using an Allen-head wrench, but an Allen-head wrench does not enable a retracting pull to be exerted on the screw. Thus, it is practically impossible to use an Allen-head wrench or a Phillips screwdriver to detach an ingrown screw from bone. Th external thread on the screw head does not start at the top of the screw head but, rather, offset somewhat from the top of the screw head. There is therefore a cylindrical feature in the region of the screw head, to facilitate attachment of the internally threaded nut.
Between the bottom of the screw head and the external thread on the screw shank, there is a free space the size of which depends on the size of the screw and the purpose of its use.
Detailed Descrip~CSOn of the Tnvent~on An embodiment of the invention will be described in detail, in conjunction with the accompanying drawings, in which:
Fig. 1 is an enlarged view in side elevation of a headed-screw construction of the invention:
Fig. 2 is a fragmentary view similar to Fig. l, to show tool-engagement to the headed screw of Fig. 1: and Fig. 3 is a view similar to Fig. 2 to show another tool engagement for a modified screw-head construction.
In Fig. 1, a screw 1 of the invention is shown to have a head 2 and a shank 3. The greater part of the screw shank is unthreaded and smoothly cylindrical, and a screw-shank thread 4 is provided only in the vicinity of the bottom of the screw head Z. when using screw 1 to fix the position of an intramedulllary 21691$
nail, this screw-shank thread 4 is thread-engaged in cortical substance of the bone.
The screw head 2 is shown with a polygonal key or socket formation 9, as for driving engagement by an Allen-head wrench (Fig. 2). But the screw head 2 may be otherwise key-formed, as at 11 for driving engagement by a Phillips screwdriver 12 (Fig. 3); thus, the screw 1 may be formed for inwardly driven engagement to bone, merely by selection of a suitable wrench or screwdriver.
10 The outside of the screw head 2 is provided with a screw-head thread 5, the thread-advance of which is directed opposite the direction of thread-advance of the screw-shank thread 4, i.e., one of these threads is a right-hand thread, and the other is a left-hand thread. This being the case, an internally threaded tool such as a nut 13 may be threaded onto the head thread 5, to the point of engagement with a stop, such as an internal shoulder formation 14: once the stop 14 is engaged, continued nut rotation in the same direction is operative to retract screw 1 from the patient's bone. And, if perchance, the threaded shank-to-bone engagement has been so fretted as to make unthreading retraction impossible, the nut 13 will serve as a readily grasped means of directly pulling the screw out of its inadequate engagement to the bone.
As shown in the drawing, a short cylindrical unthreaded formation 7 provides a crown or chamfer between the upper end of the screw-head thread 5 and the top of the screw head 2; this formation 7 facilitates location of nut 13 on the screw-head thread 5 even though the screw head 2 may be immersed within the patient's flesh and is therefore not visible. Preferably, the axial extent of formation 7 is at least one full turn of the internal thread of nut 13. And suitably, nut 13 has external formations 15 to facilitate manual grasping, in the course of a retraction of screw 1 from the patient.
Another unthreaded region 6 may also be provided between the bottom of the screw head 2 and the screw-head thread 4, said region 6 depending on the size of the screw and on the purpose of use.
2370M File 3026 HEADED SCREW CONSTRUCTION FOR USE IN
FIXING THE POSITION OF AN INTRAMEDULLARY NAII'.
round of the Invent»r The present invention relates to a headed screw construction wherein the shank of the screw locates in transverse anchor holes of an intramedullary nail and wherein threads on the shank of the screw are adapted for anchorage in bone.
The use of screw threads to fix or to anchor an intramedullary nail is known from EP 306,709 A2. In that case, an elongate screw is threaded for the entire length of its shank and passes through the intramedullary nail.
Screws having a shank with external threads only over a part of their length are known from U.S. Patent No. 4,463,753.
In that case, the two spaced regions of screw threads on the same shank serve to provide a compressive action, bringing together two fracture-separated parts of a bone. Threaded advance for the respective spaced thread regions is in the same direction, but with differing pitch. This prior art screw has no relation to an intramedullary nail.
Brief Statement of t_he Tnvention The object of the present invention is to provide a screw construction for tixing the position of an intramedullary nail, whar~in tho screw is easily positioned for intramedullary-nail engagement and is easily removable.
The invention achieves this object in a screw construction (a) in which threads for engagement in bone are limited to the shank region near the headed end of the screw, (b) in which the remainder of the shank, i.e., beyond the threads, is unthreaded, and (c) in which the head itself is externally threaded with a direction of thread advance that is opposite to the direction of thread advance on the shank. The unthreaded part of the screw shank is intended for passage through the intramedullary nail, while the threaded region of the shank secures the screw in cortical substance of a bone. Later on, when the screw is to be removed from its threaded anchorage to bane, an internally ~~:1~9:18 threaded nut may be threaded onto the external threads of the head. Once the nut has achieved a limit of head-thread engagement, continued nut rotation in the same direction is operative to drive the shank threads to retract the same from bone engagement. Thus, the screw of the invention can be removed from pinned locating engagement with the intramedullary nail and from threaded engagement to a bone, merely by driving the nut in the direction opposite to the direction of initial shank-screw engagement to the bone.
Admittedly, the retracting direction of screw rotation could also be obtained using an Allen-head wrench, but an Allen-head wrench does not enable a retracting pull to be exerted on the screw. Thus, it is practically impossible to use an Allen-head wrench or a Phillips screwdriver to detach an ingrown screw from bone. Th external thread on the screw head does not start at the top of the screw head but, rather, offset somewhat from the top of the screw head. There is therefore a cylindrical feature in the region of the screw head, to facilitate attachment of the internally threaded nut.
Between the bottom of the screw head and the external thread on the screw shank, there is a free space the size of which depends on the size of the screw and the purpose of its use.
Detailed Descrip~CSOn of the Tnvent~on An embodiment of the invention will be described in detail, in conjunction with the accompanying drawings, in which:
Fig. 1 is an enlarged view in side elevation of a headed-screw construction of the invention:
Fig. 2 is a fragmentary view similar to Fig. l, to show tool-engagement to the headed screw of Fig. 1: and Fig. 3 is a view similar to Fig. 2 to show another tool engagement for a modified screw-head construction.
In Fig. 1, a screw 1 of the invention is shown to have a head 2 and a shank 3. The greater part of the screw shank is unthreaded and smoothly cylindrical, and a screw-shank thread 4 is provided only in the vicinity of the bottom of the screw head Z. when using screw 1 to fix the position of an intramedulllary 21691$
nail, this screw-shank thread 4 is thread-engaged in cortical substance of the bone.
The screw head 2 is shown with a polygonal key or socket formation 9, as for driving engagement by an Allen-head wrench (Fig. 2). But the screw head 2 may be otherwise key-formed, as at 11 for driving engagement by a Phillips screwdriver 12 (Fig. 3); thus, the screw 1 may be formed for inwardly driven engagement to bone, merely by selection of a suitable wrench or screwdriver.
10 The outside of the screw head 2 is provided with a screw-head thread 5, the thread-advance of which is directed opposite the direction of thread-advance of the screw-shank thread 4, i.e., one of these threads is a right-hand thread, and the other is a left-hand thread. This being the case, an internally threaded tool such as a nut 13 may be threaded onto the head thread 5, to the point of engagement with a stop, such as an internal shoulder formation 14: once the stop 14 is engaged, continued nut rotation in the same direction is operative to retract screw 1 from the patient's bone. And, if perchance, the threaded shank-to-bone engagement has been so fretted as to make unthreading retraction impossible, the nut 13 will serve as a readily grasped means of directly pulling the screw out of its inadequate engagement to the bone.
As shown in the drawing, a short cylindrical unthreaded formation 7 provides a crown or chamfer between the upper end of the screw-head thread 5 and the top of the screw head 2; this formation 7 facilitates location of nut 13 on the screw-head thread 5 even though the screw head 2 may be immersed within the patient's flesh and is therefore not visible. Preferably, the axial extent of formation 7 is at least one full turn of the internal thread of nut 13. And suitably, nut 13 has external formations 15 to facilitate manual grasping, in the course of a retraction of screw 1 from the patient.
Another unthreaded region 6 may also be provided between the bottom of the screw head 2 and the screw-head thread 4, said region 6 depending on the size of the screw and on the purpose of use.
Claims (12)
1. A headed screw (1) with a bone-engaging screw thread, comprising an elongate shank (3) having an external thread (4) for bone-engaged anchorage of said screw (1), and a drive head (2) at one end of said shank (3), wherein:
(a) the shank thread (4) is close to said head (2) and extends for only a portion of the length of said shank (3);
(b) the head (2) has a key formation that is externally accessible for selective rotation of the headed screw (1) in a first direction of advancing screw-thread engagement in bone:
and (c) the head (2) has an external thread (5) having a direction of thread advance which is opposite to the direction of shank-thread (4) advance.
(a) the shank thread (4) is close to said head (2) and extends for only a portion of the length of said shank (3);
(b) the head (2) has a key formation that is externally accessible for selective rotation of the headed screw (1) in a first direction of advancing screw-thread engagement in bone:
and (c) the head (2) has an external thread (5) having a direction of thread advance which is opposite to the direction of shank-thread (4) advance.
2. The headed screw of claim 1, in which said key formation is a concave polygonal socket that is adapted for rotary drive via a convex polygonal tool.
3. The headed screw of claim 1, in which said key formation is a concave cruciform socket that is adapted for rotary drive via a convex cruciform tool.
4. The headed screw of claim 2, in which the polygonal tool is an Allen-head wrench.
5. The headed screw of claim 3, in which said convex cruciform tool is a Phillips-head screwdriver.
6. The headed screw of claim 1, in which the pin shank (3) has a free unthreaded end extending away from the shank thread (4) in the direction that is away from said head (2), the shank thread being at longitudinal offset from said free unthreaded end.
7. The headed screw of claim 1, in which the root diameter of the head thread (5) is also approximately the external diameter of the shank thread (4).
8. The headed screw of claim 6, in which the axial length of the free unthreaded end of the shank is greater than the axial length of the shank thread (4).
9. The headed screw of claim 6, in which the external diameter of the shank thread (4) decreases in approach to the free unthreaded end.
10. In combination, the headed screw of claim 1, and a nut having an internally threaded bore adapted for removable engagement to the external thread (5) of said head, said threaded bare terminating at an internal stop, whereby nut rotation in the direction to advance said nut on the thread of said head to the point of internal-stop engagement will, on continued rotation in the same direction, thereafter drive the medullary pin in the direction of unthreading retraction from engaged bone.
11. In combination the headed screw of claim 2, and a nut having an internally threaded bore that is open at one axial end of the nut and at least partially closed at the other axial end of the nut, said internally threaded bore being adapted for removable engagement to the external thread (5) of said head, and the at least partially closed portion of the bore establishing an internal stop against further threaded advance of the thread (5) of said head into the bore of said nut, whereby nut rotation in the direction to advance said nut on the thread of said head to the point of internal-stop engagement will, on continued rotation in the same direction, thereafter drive the medullary pin in the direction of unthreading retraction from engaged bone.
12. The combination of claim 11, in which, at its axially outer end, said head has a key formation, and the partial closure of said nut establishes a circular rim of diameter to clear an inserted key-engaging tool into head engagement with said key formation.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEP4307633.5 | 1993-03-11 | ||
| DE4307633A DE4307633C1 (en) | 1993-03-11 | 1993-03-11 | Screw for locking marrow-cavity pin in position - has threaded section of shank near head and opposite thread on head with unthreaded section of shank between |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2116918A1 CA2116918A1 (en) | 1994-09-12 |
| CA2116918C true CA2116918C (en) | 2004-02-17 |
Family
ID=6482466
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002116918A Expired - Lifetime CA2116918C (en) | 1993-03-11 | 1994-03-03 | Headed screw construction for use in fixing the position of an intramedullary nail |
Country Status (15)
| Country | Link |
|---|---|
| US (1) | US5375956A (en) |
| EP (1) | EP0639955B1 (en) |
| JP (1) | JP2553323B2 (en) |
| KR (1) | KR0167627B1 (en) |
| CN (1) | CN1042793C (en) |
| AT (1) | ATE137949T1 (en) |
| AU (1) | AU668657B2 (en) |
| CA (1) | CA2116918C (en) |
| DE (2) | DE4307633C1 (en) |
| ES (1) | ES2088319T3 (en) |
| NO (1) | NO179535C (en) |
| TR (1) | TR27714A (en) |
| TW (1) | TW288969B (en) |
| WO (1) | WO1994020039A1 (en) |
| ZA (1) | ZA941669B (en) |
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| NO179773C (en) * | 1994-03-14 | 1996-12-18 | Espen Haukeland | Removable orthopedic fracture stabilizer |
| US5536127A (en) * | 1994-10-13 | 1996-07-16 | Pennig; Dietmar | Headed screw construction for use in fixing the position of an intramedullary nail |
| US5681135A (en) * | 1995-01-19 | 1997-10-28 | Simonson; Peter Melott | Threaded fastener with multi-stage torque limiting applicator |
| US5607432A (en) * | 1995-01-23 | 1997-03-04 | Linvatec Corporation | Threaded suture anchor retriever |
| WO1996039974A1 (en) * | 1995-06-07 | 1996-12-19 | Implex Corporation | Femoral head core channel filling prosthesis |
| US5643264A (en) * | 1995-09-13 | 1997-07-01 | Danek Medical, Inc. | Iliac screw |
| DE19819300A1 (en) * | 1998-04-30 | 1999-11-11 | Thomas Loeffler | Method and device for producing and testing screw connections |
| DE19831336C2 (en) * | 1998-07-13 | 2003-06-18 | Sepitec Foundation Vaduz | Bone screw, especially for use with translaminar vertebrae |
| US9521999B2 (en) | 2005-09-13 | 2016-12-20 | Arthrex, Inc. | Fully-threaded bioabsorbable suture anchor |
| US8821541B2 (en) | 1999-02-02 | 2014-09-02 | Arthrex, Inc. | Suture anchor with insert-molded rigid member |
| US8343186B2 (en) | 2004-04-06 | 2013-01-01 | Arthrex, Inc. | Fully threaded suture anchor with transverse anchor pin |
| DE29913994U1 (en) * | 1999-08-11 | 2000-12-21 | Synthes Ag | Surgical guide plate |
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| EP3287089B1 (en) | 2016-08-24 | 2019-07-24 | Biedermann Technologies GmbH & Co. KG | Polyaxial bone anchoring device and system of an instrument and a polyaxial bone anchoring device |
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| WO2018226834A1 (en) * | 2017-06-07 | 2018-12-13 | Clarkson University | Adjustable length orthopedic device |
| EP3476340B1 (en) | 2017-10-25 | 2021-06-02 | Biedermann Technologies GmbH & Co. KG | Polyaxial bone anchoring device |
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| IT201800006879A1 (en) * | 2018-07-03 | 2020-01-03 | Improved kit for orthopedics, preferably for osteosynthesis. | |
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| US3741205A (en) * | 1971-06-14 | 1973-06-26 | K Markolf | Bone fixation plate |
| DE2246274A1 (en) * | 1972-09-21 | 1974-03-28 | Ortopedia Gmbh | DEVICE FOR TREATMENT OF BROKEN TUBE BONES BY AXIAL PRESSURE OSTEOSYNTHESIS |
| AU516581B2 (en) * | 1977-02-24 | 1981-06-11 | Interfix Ltd. | Bone screw |
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| US4764069A (en) * | 1987-03-16 | 1988-08-16 | Elco Industries, Inc. | Anchor for masonry veneer walls |
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| DD278491A1 (en) * | 1988-12-27 | 1990-05-09 | Medizin Labortechnik Veb K | MARK SPACE LOCK BRAND |
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-
1993
- 1993-03-11 DE DE4307633A patent/DE4307633C1/en not_active Expired - Fee Related
- 1993-12-21 US US08/171,274 patent/US5375956A/en not_active Expired - Lifetime
-
1994
- 1994-02-25 TW TW083101625A patent/TW288969B/zh not_active IP Right Cessation
- 1994-03-01 EP EP94908948A patent/EP0639955B1/en not_active Expired - Lifetime
- 1994-03-01 DE DE59400279T patent/DE59400279D1/en not_active Expired - Lifetime
- 1994-03-01 JP JP6519451A patent/JP2553323B2/en not_active Expired - Lifetime
- 1994-03-01 AU AU73460/94A patent/AU668657B2/en not_active Ceased
- 1994-03-01 ES ES94908948T patent/ES2088319T3/en not_active Expired - Lifetime
- 1994-03-01 WO PCT/DE1994/000228 patent/WO1994020039A1/en active IP Right Grant
- 1994-03-01 AT AT94908948T patent/ATE137949T1/en active
- 1994-03-01 CN CN94190040A patent/CN1042793C/en not_active Expired - Lifetime
- 1994-03-01 KR KR1019940704004A patent/KR0167627B1/en not_active IP Right Cessation
- 1994-03-03 CA CA002116918A patent/CA2116918C/en not_active Expired - Lifetime
- 1994-03-09 TR TR00273/94A patent/TR27714A/en unknown
- 1994-03-10 ZA ZA941669A patent/ZA941669B/en unknown
- 1994-09-07 NO NO943306A patent/NO179535C/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| KR950701504A (en) | 1995-04-28 |
| JP2553323B2 (en) | 1996-11-13 |
| CN1042793C (en) | 1999-04-07 |
| NO179535B (en) | 1996-07-15 |
| DE59400279D1 (en) | 1996-06-20 |
| US5375956A (en) | 1994-12-27 |
| ZA941669B (en) | 1994-10-12 |
| CN1102037A (en) | 1995-04-26 |
| NO943306D0 (en) | 1994-09-07 |
| NO943306L (en) | 1994-09-15 |
| ES2088319T3 (en) | 1996-08-01 |
| WO1994020039A1 (en) | 1994-09-15 |
| KR0167627B1 (en) | 1999-01-15 |
| ATE137949T1 (en) | 1996-06-15 |
| NO179535C (en) | 1996-10-23 |
| JPH07505567A (en) | 1995-06-22 |
| DE4307633C1 (en) | 1994-05-19 |
| TR27714A (en) | 1995-06-22 |
| TW288969B (en) | 1996-10-21 |
| EP0639955A1 (en) | 1995-03-01 |
| AU668657B2 (en) | 1996-05-09 |
| AU7346094A (en) | 1994-09-26 |
| EP0639955B1 (en) | 1996-05-15 |
| CA2116918A1 (en) | 1994-09-12 |
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| EEER | Examination request | ||
| MKEX | Expiry |
Effective date: 20140303 |