Granted Patent
Utility
US 4,307,010 · App. 06/112,962
Zeolites as smoke suppressants for halogenated polymers
Inventors:
Stanley R. Sandler, John C. Wetzel
Patented Case
View Patent ↗
Granted: Dec 22, 1981
Filed: Jan 17, 1980
Inventors
Stanley R. Sandler
John C. Wetzel
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.