Patents by Inventor Rainer Specht

Rainer Specht has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 5997544
    Abstract: A process and device for producing sterile-packed bone cement, wherein the powder component is gas-sterilized in containers that are used for packing.
    Type: Grant
    Filed: April 30, 1998
    Date of Patent: December 7, 1999
    Assignee: Merck Patent Gesellschaft mit beschrankter Haftung
    Inventors: Berthold Nies, Rainer Specht
  • Patent number: 5650108
    Abstract: A process for the preparation of porous bone replacement materials which have a partly or completely interconnecting pore system with a volume content of 5 to 60%. The bone replacement material is prepared from a mixture of a solid component, a liquid component based on acrylate/methacrylate and coarse-particled granules of a biocompatible material with an average particle diameter of 0.5 to 10 mm.
    Type: Grant
    Filed: October 5, 1995
    Date of Patent: July 22, 1997
    Assignee: Merck Patent Gesellschaft mit beschrankter Haftung
    Inventors: Berthold Nies, Sabine Troster, Rainer Specht
  • Patent number: 5551778
    Abstract: A device for mixing and discharging bone cement has a mixing cylinder which consists of two cylinder parts and in which an openworked mixing plunger can be moved axially. The lower cylinder part is sealed off by a discharging plunger. A separating plunger is arranged axially displaceably in the mixing cylinder between the mixing plunger and the discharging plunger, which separating plunger seals off the one cylinder part before the two cylinder parts are connected. The separating plunger has through-flow channels through which a liquid monomer can flow from the lower cylinder part to a pulverulent polymer in the upper cylinder part at the start of the mixing procedure.
    Type: Grant
    Filed: July 14, 1995
    Date of Patent: September 3, 1996
    Assignee: Merck Patent Gesellschaft Mit Berschrankter Haftung
    Inventors: Gunter Hauke, Rainer Specht, Ralf Krotz, Reiner Funk, Peter Martin, Berthold Nies