Patents by Inventor John P. Cassoni

John P. Cassoni 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).

  • Foaming of unsaturated polyester resin at elevated temperatures
    Patent number: 4636528
    Abstract: Low density foams are prepared from an admixture which comprises an unsaturated polyester resin, a free radical initiator which initiator is activated at temperatures from about 100.degree. to about 400.degree. F., and a compound selected from a t-alkylhydrazinium salt or a carbonylhydrazine. The low density foams have uniform cell structure without cracks or voids and the process is efficient.
    Type: Grant
    Filed: May 21, 1986
    Date of Patent: January 13, 1987
    Assignee: Pennwalt Corporation
    Inventors: Ernest R. Kamens, John P. Cassoni