Patents by Inventor Richard Lee Rollins

Richard Lee Rollins 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).

  • Phenolic foam modified with phosphorus-containing isocyanate-terminated prepolymers
    Patent number: 4119584
    Abstract: This invention provides a low density (<2 pcf.) modified phenolic foam produced by combining a resole resin with a phosphorus-containing isocyanate-terminated prepolymer in the presence of a minor amount of a surfactant, a catalytic amount of an organotin catalyst, and a halocarbon blowing agent. Foam products producted by the method of the invention have a good combination of low combustibility, friability resistance and compressive strength.
    Type: Grant
    Filed: March 25, 1977
    Date of Patent: October 10, 1978
    Assignee: Union Carbide Corporation
    Inventors: Anthony Joseph Papa, Richard Lee Rollins, Frank Edward Critchfield