Granted Patent
Utility
US 4,214,055 · App. 05/961,717
High resilience flame-retardant polyurethane foams based on polymer/polyol compositions
Inventors:
Carl G. Seefried, Jr., George H. Armstrong, Russell Van Cleve
Patented Case
View Patent ↗
Granted: Jul 22, 1980
Filed: Nov 17, 1978
Inventors
Carl G. Seefried, Jr.
George H. Armstrong
Russell Van Cleve
Assignee (at issue)
Union Carbide Corporation
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.