Patents Assigned to Astra-Meditec Aktiebolag
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Patent number: 5728437Abstract: Article exhibiting at least one surface of glass, metal or hydrophobic polymer coated with blood-compatible surface layer, in which the biocompatible surface layer consists of an adsorbed hydrophobized water-soluble polymer. Process for providing said articles by adsorption of hydrophobized water-soluble polymer. Use of such a substrate material coated with said surface layer for manufacture of medical articles having a blood-compatible surface.Type: GrantFiled: November 29, 1994Date of Patent: March 17, 1998Assignee: Astra Meditec AktiebolagInventors: H.ang.kan Bo Nygren, Emanuel Johan Stenberg
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Patent number: 5078606Abstract: A socket for use in preparing a dental prosthesis and in attaching the prosthesis to pillars attached to the patient's jawbone has a thin-walled tubular extension portion that is long enough to extend entirely through an impression material for the first mold used in preparing the prosthesis and/or through the bridge element of the prosthesis. One or more grooves on the socket enhance retention of the first mold and the bridge element.Type: GrantFiled: January 22, 1990Date of Patent: January 7, 1992Assignee: Astra Meditec AktiebolagInventor: Per O. Soderberg
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Patent number: 5009596Abstract: A device for fixing a dental prosthesis is described, which device as parts thereof comprises a spacing element (1) for anchoring into the jaw-bone of a patient and a socket (7) for fixing into a prosthetic part, whereby the socket will rest on the spacing element via an outer conical supporting surface (5) provided on one of said parts, which supporting surface will bear against an inner conical supporting surface (6) provided in the other of said parts.Type: GrantFiled: January 22, 1990Date of Patent: April 23, 1991Assignee: Astra Meditec AktiebolagInventor: Per O. Soderberg
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Patent number: 5004420Abstract: A dental bridge assembly comprises a bridge component cast from a gold alloy having a melting point not greater than 1050.degree. C. and a plurality of sockets of titanium or a titanium alloy cast in place in the bridge component, secured mechanically to the bridge component and adapted to be fastened to anchor elements attached to the jawbone of a patient.Type: GrantFiled: April 20, 1988Date of Patent: April 2, 1991Assignee: Astra Meditec AktiebolagInventor: Per O. Soderberg
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Patent number: 4995810Abstract: A tool is described, which is intended for screwing into place a threaded prosthetic part (6). The tool comprises a turning bolt (1) which has an elongated cylindrical core (2) having at one end thereof a head (3) for turning the tool, and having at its opposite end a portion (4) first threads (5) for fitting into threads in the prosthetic part, and is characterized in that the core has second threads (11), on a portion (10) thereof between the ends thereof, said second threads having a pitch direction opposite to the pitch direction fo the first threads, and a sleeve (13) arranged around the core, said sleeve having threads engaging said second threads, whereby the sleeve may be screwed into contact with the prosthetic part (6) locking the tool in the prosthetic part.Type: GrantFiled: October 20, 1989Date of Patent: February 26, 1991Assignee: Astra Meditec AktiebolagInventor: Per Olof Soderberg
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Patent number: 4772204Abstract: Implant intended to facilitate attachment of dental prostheses against a jaw-bone (2), including an externally threaded screw-shaped member (1), intended to be attached against a threaded hole taken up in the jaw-bone (2). In difference to previously known types of implants, the screw-shaped member (1) includes a blind hole directed from the jaw-bone (2), the first portion of which is a conically tapering portion (4), which is transformed into an internally threaded hole (3). Since the conical portion (4) adjacent to the end surface of the screw-shaped member (1) preferably is arranged with a diameter smaller than the outside diameter of the end portion, and since a cover screw with a conical head which is substantially enclosed by the conical portion (4) is utilized during the osseointegration process, the jaw-bone (2) can be permitted to enclose and encapsulate this end portion of the screw-shaped member (1) during the osseointegration process.Type: GrantFiled: July 22, 1985Date of Patent: September 20, 1988Assignee: Astra Meditec AktiebolagInventor: Per O. Soderberg
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Patent number: 4754877Abstract: At intermittent self catheterization it is, for a wider use of the method, desirable to enable repeated use of a catheter, preferably a limited number of times. This applies also to surface coated catheters having low friction in wet condition (LoFric.RTM.). For this purpose the invention provides a wetting and storage device for a catheter, which device comprises an elongated carrying strip (1) provided with means for retaining a catheter. The device is characterized in that, along one side of said strip there is arranged a wetting pocket (2) closed at one end thereof in which a liquid (6) may be filled and in which a catheter (7) may be introduced for wetting thereof, and that on said strip there is further arranged at least one sheet (8,9,27) of porous material, under which a catheter may be put in for drying and storage. By providing the device with a number of tablets (5) (e.g.Type: GrantFiled: December 3, 1986Date of Patent: July 5, 1988Assignee: Astra Meditec AktiebolagInventors: Eva G. Johansson, Jan M. R. Utas-Sjoberg
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Patent number: 4729766Abstract: The invention relates to a vascular prosthesis in the form of a flexible tube which can be implanted in animals or human beings, with a regular pattern of blind holes in the external surface of the tube, which are regular with regard to direction, transverse dimensions and depth and are produced by laser treatment.The invention also relates to a method of producing such a vascular prosthesis consisting in that the holes are produced by means of pulsated laser beams along one or more helical lines, the tube being rotated and displaced axially at the same time.Type: GrantFiled: April 22, 1985Date of Patent: March 8, 1988Assignee: Astra Meditec AktiebolagInventors: Sven E. Bergentz, Kjell Bockasten, Kurt Strid
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Patent number: 4666437Abstract: A process for coating a polymer surface with a hydrophilic coating with low friction in wet condition. The process comprises applying to the polymer surface a solution containing between 0.05 to 40% of a compound which comprises at least two unreacted isocyanate groups per molecule, evaporating the solvent, applying a solution containing between 0.5 to 50% of polyvinylpyrrolidone to the thus treated polymer surface and then evaporating the solvent of the last mentioned solution, and curing the coating at elevated temperature. The process is preferably carried out in the presence of a catalyst for the curing of isocyanate.Type: GrantFiled: March 5, 1986Date of Patent: May 19, 1987Assignee: Astra Meditec AktiebolagInventor: Hans R. Lambert
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Patent number: 4528982Abstract: A head assembly for a vein stripping instrument is described comprising a head lockable over an enlarged portion of a vein stripper cable by means of a snap mechanism and a cap.Type: GrantFiled: November 30, 1983Date of Patent: July 16, 1985Assignee: Astra Meditec AktiebolagInventor: Kjell I. Wellenstam
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Patent number: 4487808Abstract: A process for coating a polymer surface with a hydrophilic coating with low friction in wet condition. The process comprises applying to the polymer surface a solution containing between 0.05 to 40% of a compound which comprises at least two unreacted isocyanate groups per molecule, evaporating the solvent, applying a solution containing between 0.5 to 50% of polyethylene oxide to the thus treated polymer surface and then evaporating the solvent of the last mentioned solution, and curing the coating at elevated temperature. The process is preferably carried out in the presence of a catalyst for the curing of isocyanate.Type: GrantFiled: April 25, 1984Date of Patent: December 11, 1984Assignee: Astra Meditec AktiebolagInventor: Hans R. Lambert
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Patent number: 4459317Abstract: A process for coating a polymer surface with a hydrophilic coating with low friction in wet condition. The process comprises applying to the polymer surface a solution containing between 0.05 to 40% of a compound which comprises at least two unreacted isocyanate groups per molecule, evaporating the solvent, applying a solution containing between 0.05 to 50% of polyethylene oxide to the thus treated polymer surface and then evaporating the solvent of the last mentioned solution, and curing the coating at elevated temperature. The process is preferably carried out in the presence of a catalyst for the curing of isocyanate.Type: GrantFiled: April 21, 1983Date of Patent: July 10, 1984Assignee: Astra Meditec AktiebolagInventor: Hans R. Lambert
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Patent number: D264246Type: GrantFiled: September 6, 1979Date of Patent: May 4, 1982Assignee: Astra-Meditec AktiebolagInventors: Fred V. G. Ekbladh, Ivan E. Olsson
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Patent number: D282965Type: GrantFiled: June 21, 1983Date of Patent: March 11, 1986Assignee: Astra Meditec AktiebolagInventor: Kjell I. Wellenstam
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Patent number: D300947Type: GrantFiled: April 28, 1986Date of Patent: May 2, 1989Assignee: Astra Meditec AktiebolagInventor: Jan M. R. Utas-Sjoberg
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Patent number: D311064Type: GrantFiled: February 2, 1987Date of Patent: October 2, 1990Assignee: Astra Meditec AktiebolagInventor: Jan M. R. Utas-Sjoberg
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Patent number: D319500Type: GrantFiled: October 21, 1987Date of Patent: August 27, 1991Assignee: Astra Meditec AktiebolagInventor: Per O. Soderberg