Patents by Inventor Llewellyn D. Booth, deceased

Llewellyn D. Booth, deceased 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).

  • Polyurethane foam prepared with reduced levels of hard halocarbon blowing agents
    Patent number: 5001164
    Abstract: Closed-cell polyisocyanate-based foams are prepared using a blowing agent mixture containing an organic compound having a boiling point in excess of 65.degree. C. in conjunction with another organic compound having a boiling point below about 40.degree. C.
    Type: Grant
    Filed: August 19, 1988
    Date of Patent: March 19, 1991
    Assignee: The Dow Chemical Company
    Inventors: Guido F. Smits, Johan A. Thoen, Robert M. Davidson, Llewellyn D. Booth, deceased