Patents by Inventor J. A. Duley

J. A. Duley 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).

  • Process for producing foamed polymers
    Patent number: 5081162
    Abstract: A process for producing a foamed polymer, particularly a polyurea foam, comprises reacting an isocyanate compound and at least one active hydrogen-containing compound in the presence of a heterogeneous blowing agent. The heterogeneous blowing agent is a permanent gas and is used at a temperature and a pressure thereby rendering it in the form of a liquid, solid or deep chilled gas. The exothermicity of the reaction is substantially compensated by the energy absorbing capacity of the heterogeneous blowing agent.
    Type: Grant
    Filed: July 20, 1990
    Date of Patent: January 14, 1992
    Assignee: Woodbridge Foam Corporation
    Inventors: Paul V. Farkas, J. A. Duley