IP Library Granted Patent US 4,139,501
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.

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Quick Facts
Patent No.
US 4,139,501
App. No.
05/843,601
Filed
1977-10-19
Granted
1979-02-13
Kind
A