Patents by Inventor Steve Lichvar

Steve Lichvar 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).

  • Blowing agents for polyurethane foam
    Patent number: 4906672
    Abstract: Improved methods are provided for incorporating carbon dioxide and carbon dioxide generating compounds into polyurethane foam forming compositions as blowing agents to eliminate or reduce the amount of low boiling liquid auxiliary blowing agents, such as methylene chloride and chlorofluorocarbons conventionally used in the manufacture of urethane foams.
    Type: Grant
    Filed: July 29, 1988
    Date of Patent: March 6, 1990
    Assignee: PMC, Inc.
    Inventors: Herman Stone, Steve Lichvar, Charles W. Bredbenner, Richard Rupp, Elmer Minnich