Patents by Inventor Friedrich Leibbrandt

Friedrich Leibbrandt 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).

  • Rubber compounds of polychloroprene and hydrogenated nitrile rubber
    Patent number: 5187232
    Abstract: Mixtures of polychloroprene and hydrogenated nitrile rubber give vulcanizates combining high modulus with a high dynamic stress absorption capacity.
    Type: Grant
    Filed: October 9, 1990
    Date of Patent: February 16, 1993
    Assignee: Bayer Aktiengesellschaft
    Inventors: Rudiger Musch, Joachim Thormer, Hartmuth Buding, Friedrich Leibbrandt
  • Shaped articles for use in the exploration for and/or production of petroleum and natural gas
    Patent number: 4631309
    Abstract: Equipment for the exploration and/or production of petroleum and natural gas having elastomeric components have high resistance to materials encountered if the elastomeric components are shaped from a hydrogenated butadiene-acrylonitrile copolymer with a residual double bond content less than 1% and unhydrogenated nitrile groups.
    Type: Grant
    Filed: December 6, 1984
    Date of Patent: December 23, 1986
    Assignee: Bayer Aktiengesellschaft
    Inventors: Joachim Thormer, Friedrich Leibbrandt, Zsolt Szentivanyi, Hartmuth Buding