Patents by Inventor Jack D. Hoffman

Jack D. Hoffman 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).

  • Quick cure catalyst for polyester molding compositions
    Patent number: 4278558
    Abstract: A catalyst for curing unsaturated polyester resins comprising a mixture consisting essentially of about 20 to 40% by weight of 2,5-dimethylhexane-2,5-diperoxybenzoate, about 10 to 25% by weight of tert-butyl peroxy (2-ethyl hexanoate), and about 40 to 65% by weight of tert-butylperoxy isopropyl carbonate.
    Type: Grant
    Filed: July 10, 1979
    Date of Patent: July 14, 1981
    Assignee: Eagle-Picher Industries, Inc.
    Inventors: Donald C. Smith, Jack D. Hoffman