Granted Patent
Utility
US 4,240,887 · App. 06/021,966
Process of water electrolyis
Inventor:
Dale E. Hall
Patented Case
View Patent ↗
Granted: Dec 23, 1980
Filed: Mar 19, 1979
Inventor
Dale E. Hall
Assignee (at issue)
The International Nickel Company, 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.