Granted Patent
Utility
US 4,804,442 · App. 06/891,097
Ultrapure hydrazine production
Inventor:
James G. Rigsby
Patented Case
View Patent ↗
Granted: Feb 14, 1989
Filed: Jul 31, 1986
Inventor
James G. Rigsby
Assignee (at issue)
Olin 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.