Granted Patent
Utility
US 4,687,640 · App. 06/796,720
Chlorine gas filtering material suitable for use in a chemical oxygen generator
Inventor:
Samuel P. Schillaci
Patented Case
View Patent ↗
Granted: Aug 18, 1987
Filed: Nov 8, 1985
Inventor
Samuel P. Schillaci
Assignee (at issue)
Figgie Inernational 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.