Patents by Inventor John C. Robison

John C. Robison 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).

  • Method of preparing maleic anhydride terpolymers
    Patent number: 5221787
    Abstract: A terpolymer of a monovinylic aromatic monomer, an acrylic monomer and maleic anhydride is formed according to a polymerization method in which the maleic anhydride is added to the reactor in a molten state, free of solvents and diluents, and the polymerization reaction is conducted in bulk in the absence of solvents and diluents. The terpolymer is useful in various applications including blending with ABS graft polymers.
    Type: Grant
    Filed: December 22, 1989
    Date of Patent: June 22, 1993
    Assignee: General Electric Company
    Inventors: John C. Robison, James M. Haynes, John E. Pace