Granted Patent
Utility
US 4,356,274 · App. 06/030,400
Smoke suppressed rigid polyurethane foam
Inventors:
Stanley R. Sandler, Jeffrey D. Miano
Patented Case
View Patent ↗
Granted: Oct 26, 1982
Filed: Apr 16, 1979
Inventors
Stanley R. Sandler
Jeffrey D. Miano
Assignee (at issue)
Pennwalt 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.