Patents by Inventor Robert B. Clipper

Robert B. Clipper 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).

  • ABS Compositions having trimodal rubber particle distributions
    Patent number: 4874815
    Abstract: A rubber modified interpolymer of a monovinylidene aromatic monomer and an ethylenically unsaturated nitrile monomer. The rubber particles of the present invention have a trimodal particle size distribution. Said particles comprise an emulsion polymerized particle and two mass polymerized particles. The compositions exhibit good impact resistance over a broad range of impact speeds.
    Type: Grant
    Filed: September 8, 1987
    Date of Patent: October 17, 1989
    Assignee: The Dow Chemical Company
    Inventors: Robert A. Bubeck, Robert B. Clipper, David E. Henton