Patents by Inventor Kurt Polzhofer

Kurt Polzhofer 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).

  • Hydrogel contact lenses of high biocompatibility
    Patent number: 6733123
    Abstract: A hydrogel contact lens is described, the HEMA basic material of which is copolymerized with SPE and amino acids. The water retention capability and the refractive index of the resulting contact lens are similar to those of the natural cornea.
    Type: Grant
    Filed: November 9, 2001
    Date of Patent: May 11, 2004
    Assignee: Wohlk Contact-Linsen GmbH
    Inventors: Kurt Polzhofer, Roland Fromme, Lothar Haase, K Herter, Birgit Kollosche
  • Hydrogel contact lenses of high biocompatibility
    Publication number: 20020180927
    Abstract: A hydrogel contact lens is described, the HEMA basic material of which is copolymerized with SPE and amino acids. The water retention capability and the refractive index of the resulting contact lens are similar to those of the natural cornea.
    Type: Application
    Filed: November 9, 2001
    Publication date: December 5, 2002
    Inventors: Kurt Polzhofer, Roland Fromme, Lothar Haase, K. Herter, Birgit Kollosche
  • Self-curing composition based upon polymethylmethacrylate and process for manufacturing said self-curing composition
    Patent number: 4268639
    Abstract: Self-curing compositions are prepared based on polymethyl methacrylate (PMMA) are by mixing a finely powdered solid polymer phase of PMMA and/or poly (2-hydroxyethyl methacrylate) (PHEMA) with a liquid monomer phase of methyl methacrylate (MMA) and/or 2-hydroxyethyl methacrylate (HEMA) in a weight ratio of polymer phase to monomer phase of 1.5 to 3.3:1 wherein the portion of PHEMA in the cured product is between 2 and 99 weight %. The product is prepared by vigorously stirring the mixture at room temperature until the polymerization is essentially finished.
    Type: Grant
    Filed: September 19, 1979
    Date of Patent: May 19, 1981
    Inventors: Hartmut Seidel, Kurt Polzhofer