Patents Assigned to Astra-Meditec Aktiebolag
  • Patent number: 5728437
    Abstract: 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: Grant
    Filed: November 29, 1994
    Date of Patent: March 17, 1998
    Assignee: Astra Meditec Aktiebolag
    Inventors: H.ang.kan Bo Nygren, Emanuel Johan Stenberg
  • Patent number: 5078606
    Abstract: 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: Grant
    Filed: January 22, 1990
    Date of Patent: January 7, 1992
    Assignee: Astra Meditec Aktiebolag
    Inventor: Per O. Soderberg
  • Patent number: 5009596
    Abstract: 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: Grant
    Filed: January 22, 1990
    Date of Patent: April 23, 1991
    Assignee: Astra Meditec Aktiebolag
    Inventor: Per O. Soderberg
  • Patent number: 5004420
    Abstract: 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: Grant
    Filed: April 20, 1988
    Date of Patent: April 2, 1991
    Assignee: Astra Meditec Aktiebolag
    Inventor: Per O. Soderberg
  • Patent number: 4995810
    Abstract: 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: Grant
    Filed: October 20, 1989
    Date of Patent: February 26, 1991
    Assignee: Astra Meditec Aktiebolag
    Inventor: Per Olof Soderberg
  • Patent number: 4772204
    Abstract: 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: Grant
    Filed: July 22, 1985
    Date of Patent: September 20, 1988
    Assignee: Astra Meditec Aktiebolag
    Inventor: Per O. Soderberg
  • Patent number: 4754877
    Abstract: 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: Grant
    Filed: December 3, 1986
    Date of Patent: July 5, 1988
    Assignee: Astra Meditec Aktiebolag
    Inventors: Eva G. Johansson, Jan M. R. Utas-Sjoberg
  • Patent number: 4729766
    Abstract: 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: Grant
    Filed: April 22, 1985
    Date of Patent: March 8, 1988
    Assignee: Astra Meditec Aktiebolag
    Inventors: Sven E. Bergentz, Kjell Bockasten, Kurt Strid
  • Patent number: 4666437
    Abstract: 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: Grant
    Filed: March 5, 1986
    Date of Patent: May 19, 1987
    Assignee: Astra Meditec Aktiebolag
    Inventor: Hans R. Lambert
  • Patent number: 4528982
    Abstract: 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: Grant
    Filed: November 30, 1983
    Date of Patent: July 16, 1985
    Assignee: Astra Meditec Aktiebolag
    Inventor: Kjell I. Wellenstam
  • Patent number: 4487808
    Abstract: 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: Grant
    Filed: April 25, 1984
    Date of Patent: December 11, 1984
    Assignee: Astra Meditec Aktiebolag
    Inventor: Hans R. Lambert
  • Patent number: 4459317
    Abstract: 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: Grant
    Filed: April 21, 1983
    Date of Patent: July 10, 1984
    Assignee: Astra Meditec Aktiebolag
    Inventor: Hans R. Lambert
  • Patent number: D264246
    Type: Grant
    Filed: September 6, 1979
    Date of Patent: May 4, 1982
    Assignee: Astra-Meditec Aktiebolag
    Inventors: Fred V. G. Ekbladh, Ivan E. Olsson
  • Patent number: D282965
    Type: Grant
    Filed: June 21, 1983
    Date of Patent: March 11, 1986
    Assignee: Astra Meditec Aktiebolag
    Inventor: Kjell I. Wellenstam
  • Patent number: D300947
    Type: Grant
    Filed: April 28, 1986
    Date of Patent: May 2, 1989
    Assignee: Astra Meditec Aktiebolag
    Inventor: Jan M. R. Utas-Sjoberg
  • Patent number: D311064
    Type: Grant
    Filed: February 2, 1987
    Date of Patent: October 2, 1990
    Assignee: Astra Meditec Aktiebolag
    Inventor: Jan M. R. Utas-Sjoberg
  • Patent number: D319500
    Type: Grant
    Filed: October 21, 1987
    Date of Patent: August 27, 1991
    Assignee: Astra Meditec Aktiebolag
    Inventor: Per O. Soderberg