Patents by Inventor Thirumurti Naravan

Thirumurti Naravan 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).

Isocyanate terminated quasi-prepolymers useful for preparing polyurethane/polyisocyanurate foams having low thermal conductivity

Patent number: 4888365

Abstract: Polyurethane/polyisocyanurate rigid foams having low thermal conductivity are prepared from isocyanate-terminated quasi-prepolymers prepared from polyester polyols derived from phthalic anhydride or from the transesterification of polyethylene terephthalate scrap.

Type: Grant

Filed: September 16, 1988

Date of Patent: December 19, 1989

Assignee: BASF Corporation

Inventors: Robert E. Riley, Thirumurti Naravan

Isocyanate terminated quasi-prepolymers useful for preparing polyurethane/polyisocyanurate foams having low thermal conductivity