Granted Patent
Utility
US 4,351,813 · App. 06/265,307
Process for producing phosphorus pentoxide or phosphorus or phosphoric acid
Inventors:
Joseph A. Megy, Robert A. Hard
Patented Case
View Patent ↗
Granted: Sep 28, 1982
Filed: May 20, 1981
Inventors
Joseph A. Megy
Robert A. Hard
Assignee (at issue)
Occidental Research 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.