Granted Patent
Utility
US 4,258,018 · App. 06/107,479
Processing elemental phosphorus (P.sub.4) containing gas streams
Inventor:
William J. Powell
Patented Case
View Patent ↗
Granted: Mar 24, 1981
Filed: Dec 26, 1979
Inventor
William J. Powell
Assignee (at issue)
Stauffer Chemical Company
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.