Patents by Inventor Peter Preiss

Peter Preiss 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).

  • Spermicidal coating composition
    Patent number: 5304375
    Abstract: The present invention relates to spermicidal coating compositions for coating latex materials containing one or more spermicidal agents, more particularly based on Nonoxinol-9, and one or more organopolysiloxane compounds in which the spermicidal agents are soluble.
    Type: Grant
    Filed: May 6, 1991
    Date of Patent: April 19, 1994
    Assignee: Bayer Aktiengesellschaft
    Inventors: Gerwig Marquardt, Peter Preiss
  • Stablized polyorganosiloxanes and their use as a power transmission medium
    Patent number: 5013858
    Abstract: A power transmission medium having improved resistance to oxidation and heat comprising polyorganosiloxanes and an effective amount of a mixture of anthraquinone compounds and methyl hydrogen siloxanes.
    Type: Grant
    Filed: April 25, 1990
    Date of Patent: May 7, 1991
    Assignee: Bayer Aktiengesellschaft
    Inventors: Gerwig Marquardt, Peter Preiss