Patents by Inventor Geert Christoph

Geert Christoph 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).

  • Glass fibres with improved biological compatibility
    Patent number: 5332698
    Abstract: Glass fibres which are distinguished by their greatly reduced carcinogenicity have an average fibre diameter of <8 .mu.m, preferably <3 .mu.m, with more than 10% of the fibres having a diameter of <3 .mu.m. The types of glass used for producing these fibres are characterized by containing the following compounds in the proportions shown in mol %:______________________________________ SiO.sub.2 55-70 B.sub.2 O.sub.3 0-4 Al.sub.2 O.sub.3 0-1 TiO.sub.2 0-6 Iron oxides 0-2 MgO 0-5 CaO 12-20 Na.sub.2 O 10-20 K.sub.2 O 0-5 fluoride 0-2.
    Type: Grant
    Filed: July 30, 1993
    Date of Patent: July 26, 1994
    Assignee: Bayer Aktiengesellschaft
    Inventors: Peter R. Nyssen, Wolfram Wagner, Geert Christoph
  • Process for the manufacture of a sandwich laminate and the resultant sandwich laminate
    Patent number: 5135806
    Abstract: Sandwich laminates capable of withstanding high stresses, especially skis, can be manufactured by covering the wall of a mold cavity with a wet laminate, laying extremely fine glass fiber paper thereon and after closure of the mold introducing into the mold cavity a reaction mixture forming a rigid foamed plastic, which cures to a rigid foam core.
    Type: Grant
    Filed: January 10, 1992
    Date of Patent: August 4, 1992
    Assignee: Bayer Aktiengesellschaft
    Inventors: Robert Eiben, Geert Christoph, Elke von Seggern
  • Fibre and filament mixtures containing high-shrinkage bifilar poly(mod)acrylic filaments or fibres modified with carbon black
    Patent number: 4248934
    Abstract: The invention relates to fibre or filament mixtures consisting of high shrinkage side-by-side bifilar (mod)acrylic fibres or filaments separately containing TiO.sub.2 and carbon black and of normal fibres or filaments of polyamide, polyester, polyalkylene, poly(mod)acrylic, wool or cotton.
    Type: Grant
    Filed: July 5, 1978
    Date of Patent: February 3, 1981
    Assignee: Bayer Aktiengesellschaft
    Inventors: Martin Wandel, Helmut Engelhard, Ernst Gutschik, Manfred Reichardt, Geert Christoph
  • Permanently antistatic polyamide compositions
    Patent number: 3966835
    Abstract: The invention relates to novel permanently antistatic polyamide compositions comprising an aliphatic polyamide and from 0.5 to 40 % by weight, based on the polyamide composition, of a polyalkylene oxide obtained by the copolymerisation of mono-epoxides with di- or tri-epoxides.
    Type: Grant
    Filed: December 22, 1972
    Date of Patent: June 29, 1976
    Assignee: Bayer Aktiengesellschaft
    Inventors: Geert Christoph, Eduard Radlmann, Gunther Nischk, Ludwig Bruns, Gunther Schnuchel