EP0502039A1 - Artificial joint, especially for finger joints - Google Patents

Artificial joint, especially for finger joints

Info

Publication number
EP0502039A1
EP0502039A1 EP90917283A EP90917283A EP0502039A1 EP 0502039 A1 EP0502039 A1 EP 0502039A1 EP 90917283 A EP90917283 A EP 90917283A EP 90917283 A EP90917283 A EP 90917283A EP 0502039 A1 EP0502039 A1 EP 0502039A1
Authority
EP
European Patent Office
Prior art keywords
joined
wire
joint
joint prosthesis
spring
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.)
Withdrawn
Application number
EP90917283A
Other languages
German (de)
French (fr)
Inventor
Bengt Persson
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Volvo AB
Original Assignee
Volvo AB
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Volvo AB filed Critical Volvo AB
Publication of EP0502039A1 publication Critical patent/EP0502039A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2/42—Joints for wrists or ankles; for hands, e.g. fingers; for feet, e.g. toes
    • A61F2/4241—Joints for wrists or ankles; for hands, e.g. fingers; for feet, e.g. toes for hands, e.g. fingers
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
    • A61F2002/30316—The prosthesis having different structural features at different locations within the same prosthesis; Connections between prosthetic parts; Special structural features of bone or joint prostheses not otherwise provided for
    • A61F2002/30329—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
    • A61F2002/30331—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements made by longitudinally pushing a protrusion into a complementarily-shaped recess, e.g. held by friction fit
    • A61F2002/30354—Cylindrically-shaped protrusion and recess, e.g. cylinder of circular basis
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
    • A61F2002/30316—The prosthesis having different structural features at different locations within the same prosthesis; Connections between prosthetic parts; Special structural features of bone or joint prostheses not otherwise provided for
    • A61F2002/30535—Special structural features of bone or joint prostheses not otherwise provided for
    • A61F2002/30565—Special structural features of bone or joint prostheses not otherwise provided for having spring elements
    • A61F2002/30566—Helical springs
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
    • A61F2002/30316—The prosthesis having different structural features at different locations within the same prosthesis; Connections between prosthetic parts; Special structural features of bone or joint prostheses not otherwise provided for
    • A61F2002/30535—Special structural features of bone or joint prostheses not otherwise provided for
    • A61F2002/30574—Special structural features of bone or joint prostheses not otherwise provided for with an integral complete or partial collar or flange
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
    • A61F2002/30621—Features concerning the anatomical functioning or articulation of the prosthetic joint
    • A61F2002/30624—Hinged joint, e.g. with transverse axle restricting the movement
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2/42—Joints for wrists or ankles; for hands, e.g. fingers; for feet, e.g. toes
    • A61F2/4241—Joints for wrists or ankles; for hands, e.g. fingers; for feet, e.g. toes for hands, e.g. fingers
    • A61F2002/4243—Joints for wrists or ankles; for hands, e.g. fingers; for feet, e.g. toes for hands, e.g. fingers for interphalangeal joints, i.e. IP joints
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2220/00—Fixations or connections for prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
    • A61F2220/0025—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
    • A61F2220/0033—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements made by longitudinally pushing a protrusion into a complementary-shaped recess, e.g. held by friction fit

Abstract

Prothèse d'articulation digitale comprenant une paire de broches (6) au titane, conçue pour être implantée de manière chirurgicale dans les os adjacents à l'articulation, ainsi qu'un corps d'articulation intermédiaire joint auxdites broches, ledit corps contenant un ensemble de ressorts hélicoïdaux (8, 9) sollicitant l'articulation digitale dans la position étendue.Digital joint prosthesis comprising a pair of titanium pins (6), designed to be implanted surgically in the bones adjacent to the joint, as well as an intermediate joint body joined to said pins, said body containing a set helical springs (8, 9) stressing the digital joint in the extended position.

Description

Artificial joint, especially for finger joints.
The present invention relates to a joint prosthesis, comprising a pair of anchoring members surgically im- plantable in the bones adjacent to the joint and an articulating body for joint to the anchoring members.
A finger joint prosthesis of this type developed in recent years consists of a pair of titanium screws which can be surgically implanted in the bones adjacent to the finger joint and an intermediate articulating body of silicon rubber, which is injection moulded over the flange por¬ tions of the screws. Each titanium screw is inserted into a bore in the longitudinal direction of the respective finger bone and in time is integrated with the bone tissue. The silicon rubber, which makes up the joint itself, serves as a hinge with a slight amount of re¬ silience.
The advantage of making the joint itself of silicon rubber in this manner is that it is possible to obtain a simple and reliable design without friction producing elements such as in a ball-and-socket joint.
it has, however, been shown that silicon in the joint itself affects the bone tissue in such a manner as to dissolve the bone adjacent to the joint. This results, inter alia, in a weakening of the anchoring of the titanium screws. Another disadvantage is the very limited resilient force in the silicon joint acting to straighten out a bent finger.
The purpose of the present invention is to provide a joint prosthesis of the type described by way of introduction, which, without use of silicon or another elastomer, pro¬ vides a simple and reliable joint in which there can be achieved a well-balanced spring-back effect. This is achieved according to the invention by virtue of the fact that the articulating body comprises at least one helically wound spring wire having one end joined to one of the anchoring members and the other end joined to the other anchoring member.
In the joint according to the invention, a helical spring means forms the elastic connection between the bones. The wire material, the wire diameter and the number of coils determine the spring force and the spring path or joint angle, which makes it possible to adjust these parameters in a simple manner so that a joint can be achieved which also increases mobility in persons suffering from rheuma¬ tism.
In a preferred embodiment of the joint prosthesis accord¬ ing to the invention, two helically wound spring wires are used which are so intertwined that the windings of one wire lie between the windings of the other wire. Each wire has one end joined to one anchoring member and the other end joined to the other anchoring member in such a manner that each anchoring member is joined to both wires at either end of the spring package. This design avoids the overturning moment which is otherwise exerted by a simple helix if the wire ends at opposite ends of the helix are joined to individual anchoring members. In the embodiment according to the invention with double springs and "dia¬ gonal" anchoring, the overturning moments cancel each other out so that the spring force will be symmetrical relative to the longitudinal centre line of the joint.
The invention will be described below with reference to an example shown in the accompanying drawings, in which Figure 1 shows a schematic X-ray picture of a finger with a joint prosthesis according to the invention implanted in a finger. Figure 2 shows a perspective view of an embodiment in schematic form to illustrate the principle of the in¬ vention, and
Figures 3 and 4 show a longitudinal section and a cross- -section, respectively, through a preferred embodiment.
In Figure l, l and 2 designates two bones in a finger. The facing ends of the bones have been cut off to provide room for a joint prosthesis, generally designated 3, consisting of an articulating body 4, a pair of stainless plates 5 and a pair of stainless pins 6a. The pins 6a are inserted into bores in titanium pins 6b, previously surgically im¬ planted and held securely by bone growth.
The principle and functioning of the articulating body 4 itself are illustrated in Figure 2. The articulating body comprises a cylindrical carrier 7, on which two metal wires 8 and 9 of spring steel, e.g. stainless 18/8 steel, are helically wound in such a manner that the wires are entwined in each other. The wires are wound so that the ingoing end (10 or 11) and the outgong end (12 or 13) of each wire are oppositely directed. The ends 10-13 of the wires are joined in pairs to a pair of plates 14, 15 to which pins 6 are fixed. The mounting of the wire ends 10-13 in the manner described results in the individual helical springs formed by the wires 8, 9 being subjected to oppositely directed overturning moments "a" and "b", which cancel each other out during an articulating move¬ ment as indicating by the arrow "c".
Figures 3 and 4 show the preferred embodiment of the joint prosthesis of Figure 1 on a very large scale. Components corresponding to those in Figures 1 and 2 have been given the same reference numerals. The practical embodiment according to Figures 3 and 4 differs from the sketch in Figure 2 showing the principle of the invention only in that the flat anchoring elements in Figure 2 have been given the form of a pair of concentric sleeves 14 and 15. Preferably, they are made of stainless steel and have on their facing surfaces 16, 17 a polyethylene coating so that the friction between the sleeves 14, 15 will be minimal upon relative rotation during the articulating movement.
in the embodiment in Figure 3, the articulating body 4 is separate from the pins 6b and is only joined thereto by means of a bayonet connection which allows the joint to be easily replaced should this become necessary.
For this purpose, each plate 5 is eguipped with a driver pin 18, 19, respectively, with a flange 30. The drivers are each fixed in an individual bore 20, 21 in the cylin- der 14 or 15 and the flanges 30 are fixed in the corre¬ sponding cavities 31 in the plates by means of lock screws 32. The outermost cylinder 14 is provided with a peri¬ pheral through slot 22, through which the driver 19 for the inner sleeve 15 extends. The peripheral extension of said slot determines the maximum angle of articulation. In the embodiment shown in Figure 3, the slot is so long that it permits articulation between 0° and 90°.
The ends 10, 11 and 12, 13, respectively, of the wire springs 8 and 9, respectively, are fixed in the outer sleeve 14 and the inner sleeve 15, respectively, in the same pattern as shown in Figure 2. The respective wire ends 10, 11 extend through a peripheral slot 23 in the inner sleeve (Figure 4), the peripheral extent of which corresponds to the extent of the slot 22 and out through a bore 24 in the outer sleeve 14, where it is locked by means of a bent portion. Each wire end 12, 13 is fixed in a bore 25 (Figure 4) in the inner sleeve 15.
The spring package formed by the wire springs 8, 9 can either be entirely unloaded in the completely extended position shown in Figure 3, or can have a slight pre- tensioning so that the lateral surface of the driver 19 joined to the inner sleeve 15 is lightly pressed against the upper end edge 26 of the slot 22. In the position shown in Figures 3 and 4, representing the straight ex- tended position of the joint, there is a small play "s" between the wire windings and the outer surface of the cylinder 7 and the inner surface of the inner sleeve 15. This play is required to provide for the expansion of spring 8 and the contraction of spring 9 during articu- lation.
A preferred embodiment has been described above, in which the springs 8, 9 are wound about a cylinder 7. This has a single purpose, namely to provide an inner limit for the wire helices to prevent the wire springs from interfering with each other, other dispositions of the wire windings are. however, conceivable so that the cylinder can be eliminated. It is also theoretically possible to achieve a resilient joint with a single helical spring, which, how- ever, does not provide the optimum solution obtained by the above described embodiment.

Claims

l. Joint prosthesis, comprising a pair of anchoring members surgically implantable in the bones adjacent to the joint, and an articulating body (4) joined to the anchoring members, c h a r a c t e r i z e d in that the articulating body comprises at least one helically wound spring wire (8, 9) having one end (10, 11) joined to one (6, 14) of the anchoring members, and the other end (12, 13) joined to the other anchoring member (6, 15).
2. Joint prosthesis according to Claim l, c h a r a c t ¬ e r i z e d in that the articulating body (4) comprises a cylindrical carrier (7), on which the spring wire (8, 9) is wound.
3. Joint prosthesis according to Claim l or 2, c h a r ¬ a c t e r i z e d in that the articulating body (4) com¬ prises two helically wound spring wires (8, 9) which are entwined so that the windings of one wire lie between the windings of the other wire, and that each wire has an end (io, 11) joined to one anchoring member (6, 14) and an¬ other end (12, 13) joined to the other anchoring member (6, 15).
4. Joint prosthesis according to one of Claims 1-3, c h a r a c t e r i z e d in that the articulating body (4) comprises a pair of concentrically mounted, cylind¬ rical sleeve elements (14, 15), which surround the cylind¬ rical carrier (7), and that one end (10, 11) of said wire spring(s) (8, 9) is joined to one sleeve (14) while the other end (12, 13) is joined to the other sleeve (15), so that the sleeves are rotatable relative to each other against the force of the helical spring or springs exerted by the spring wire(s).
5. Joint prosthesis according to Claim 4, c h a r a c t ¬ e r i z e d in that the anchoring members comprise a pin (6, 19, 6, 20) joined to an individual sleeve (14, 15), the surgically implantable (1, 2) portion thereof consiβt- ing of titanium, and that the outer sleeve (14) has a peripheral extending through slot (22), through which the pin (19) in the inner sleeve (15) extends.
6. Joint prosthesis according to Claim 4 or 5, c h a r - a c t e r i z e d in that the sleeves (14, 15) consist of stainless steel and that their frictional surfaces (16, 17) facing each other are coated with a polyethylene layer
7. Joint prosthesis according to one of Claims 1-6, c h a r a c t e r i z e d in that the spring wires (8, 9) consist of stainless steel and have a diameter of about 0.5 mm.
EP90917283A 1989-11-15 1990-11-14 Artificial joint, especially for finger joints Withdrawn EP0502039A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE8903838 1989-11-15
SE8903838A SE464961B (en) 1989-11-15 1989-11-15 LED PROTES, IN PARTICULAR, FINGER LEADERS

Publications (1)

Publication Number Publication Date
EP0502039A1 true EP0502039A1 (en) 1992-09-09

Family

ID=20377489

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90917283A Withdrawn EP0502039A1 (en) 1989-11-15 1990-11-14 Artificial joint, especially for finger joints

Country Status (4)

Country Link
EP (1) EP0502039A1 (en)
JP (1) JPH04503025A (en)
SE (1) SE464961B (en)
WO (1) WO1991007149A1 (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2717071B1 (en) * 1994-03-11 1996-05-31 Procerati Joint prosthesis.
IT1277790B1 (en) * 1995-02-17 1997-11-12 Tecres Spa METACARPO-FALANGEA AND INTERPHALANGE PROSTHESES FOR HAND OR FOOT JOINTS
SE510125C2 (en) 1996-01-22 1999-04-19 Handevelop Ab A prosthetic device
JP2002503999A (en) 1997-06-18 2002-02-05 ベーラー，アンドレ Endoprosthesis for joints, especially finger, toe or wrist joints
BR0307975A (en) 2002-02-25 2005-01-11 Elan Pharm Inc Methods for chronically reducing pathological inflammation in a patient and for determining the effectiveness of a chronic administration regimen for treating pathological inflammation in an individual, composition and combined therapy for chronic treatment of pathological inflammation in a patient and use of an alpha inhibitor. 4-integrin
WO2012009735A1 (en) * 2010-07-16 2012-01-19 Vaal University Of Technology Articulating prosthesis
JP6093562B2 (en) * 2012-12-07 2017-03-08 株式会社トランストロン Displacement detector
US10682237B2 (en) * 2015-09-03 2020-06-16 Cmc Sert Ltd. Prosthesis for replacing joint in a human hand or foot

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1350518A (en) * 1919-08-01 1920-08-24 Grant Prisbrey Artificial leg
US3990116A (en) * 1974-10-17 1976-11-09 Fixel Irving E Pretensioned prosthetic device for skeletal joints

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9107149A1 *

Also Published As

Publication number Publication date
JPH04503025A (en) 1992-06-04
WO1991007149A1 (en) 1991-05-30
SE8903838D0 (en) 1989-11-15
SE8903838L (en) 1991-05-16
SE464961B (en) 1991-07-08

Similar Documents

Publication Publication Date Title
US4871367A (en) Surgically implanted prosthesis
US10004539B2 (en) System and method for dynamic vertebral stabilization
US20060276787A1 (en) Pedicle screw, cervical screw and rod
JP4500350B2 (en) Artificial joint
JP5344714B2 (en) Artificial joint
US4267608A (en) Prosthetic joint
US8221467B2 (en) Dynamic spinal stabilization device and systems
KR19990081884A (en) Joint prosthetic devices
JPH078504A (en) Intervertebral stabilizing device
JP2001507957A (en) Elastically deformable spinal osteosynthesis device
KR20070045128A (en) Implant with one-piece swivel joint
JPH08509645A (en) Vertebral body implant
WO1997032535A1 (en) Universal prosthetic and implant abutment
JP2002532144A (en) Disc prosthesis with contact studs
JP2002518090A (en) Artificial disc
EP0556229A1 (en) Implantable defibrillation electrode and method of manufacture.
SK122893A3 (en) Support for a heart valve prosthesis
EP0502039A1 (en) Artificial joint, especially for finger joints
US4183104A (en) Joint implant
JPS6161814B2 (en)
JP2001517512A (en) toothbrush
JP7210457B2 (en) bone plate internal fixator
US20050080487A1 (en) Intervertebral implant
WO2002085261A1 (en) Intervertebral disc implant device
KR100195795B1 (en) Chair back

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 19910711

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE CH DE DK ES FR GB IT LI LU NL SE

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19930601