Patents by Inventor Joseph O. Campbell

Joseph O. Campbell 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).

  • Patent number: 5973074
    Abstract: A thermoplastic molding composition having a light transmission value of at least 40% is disclosed. The composition contains a thermoplastic polyurethane component, a styrene copolymer, and an alkyl(meth)acrylate component and is characterized by the compatibility of its components. The weight ratio between the styrene copolymer to the sum of the styrene copolymer and alkyl(meth)acrylate components was found to be critical to the light transmission of the inventive composition.
    Type: Grant
    Filed: September 2, 1998
    Date of Patent: October 26, 1999
    Assignee: Bayer Corporation
    Inventors: Joseph O. Campbell, Eric K. Yeh, Russell P. Wong, Paul J. Drenzek
  • Patent number: 4870131
    Abstract: A composition capable of providing low gloss in a part molded therefrom consisting essentially of 20 to 50% by weight of a graft copolymer of ethylenically unsaturated monomers grafted unto a rubber with a rubber content of 5 to 80% by weight based on the weight of Component A; 80 to 50% by weight of one or more thermoplastic, rubber-free copolymers containing: (i) 1 to 25% by weight based on the total weight of Component (B) of an unsaturated dicarboxylic acid anhydride monomer and (ii) 0.5 to 2% by weight based on the total weight of Component (B) of an ethylenically unsaturated copolymerized epoxide compound.
    Type: Grant
    Filed: February 22, 1988
    Date of Patent: September 26, 1989
    Assignee: Monsanto Company
    Inventors: Ramesh M. Pisipati, Joseph O. Campbell
  • Patent number: 4312962
    Abstract: The adhesion between a metal plating and a polymeric substrate comprising an ABS blended with a strene/maleic anhydride polymer, is greatly increased by incorporating into the substrate a C.sub.1 to C.sub.6 ester of a C.sub.12 to C.sub.20 fatty acid.
    Type: Grant
    Filed: February 23, 1981
    Date of Patent: January 26, 1982
    Assignee: Monsanto Company
    Inventors: Joseph O. Campbell, Marie Y. Jean-Pierre