Granted Patent
Utility
US 4,139,501 · App. 05/843,601
Production of polyurethane foam of reduced tendency to form embers when burned
Inventors:
Bernard Rudner, Thomas M. Noone, Peter D. Pauly
Patented Case
View Patent ↗
Granted: Feb 13, 1979
Filed: Oct 19, 1977
Inventors
Bernard Rudner
Thomas M. Noone
Peter D. Pauly
Assignee (at issue)
Tenneco Chemicals, 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.