Granted Patent
Utility
US 4,490,485 · App. 06/592,653
Manufacture of flexible polyurethane foam containing a condensation product of polyethylene terephthalate
Inventors:
Bruce W. Peterson, George P. Speranza, Robert A. Grigsby, Jr.
Patented Case
View Patent ↗
Granted: Dec 25, 1984
Filed: Mar 23, 1984
Inventors
Bruce W. Peterson
George P. Speranza
Robert A. Grigsby, Jr.
Assignee (at issue)
Texaco Inc.
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.