Patents by Inventor William A. Wiseman

William A. Wiseman 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).

  • Plasticized hydrogenated nitrile rubber
    Patent number: 5068275
    Abstract: This invention provides a plasticized hydrogenated nitrile composition. The composition of the present invention must contain a peroxide vulcanization system and a specific type of plasticizer. Vulcanizates according to the invention have superior resistance to hot air ageing in comparison to conventionally plasticized compositions, and most surprisingly, in comparison to non-plasticized compositions. The compositions of the present invention may be used to prepare hoses, seals, gaskets and other rubber goods.
    Type: Grant
    Filed: October 5, 1990
    Date of Patent: November 26, 1991
    Assignee: Polysar Rubber Corporation
    Inventor: William A. Wiseman