Granted Patent
Utility
US 4,052,346 · App. 05/583,329
Flame-retardant polyurethane foam compositions
Inventors:
Bernard Rudner, Peter D. Pauly
Patented Case
View Patent ↗
Granted: Oct 4, 1977
Filed: Jun 3, 1975
Inventors
Bernard Rudner
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.