Granted Patent
Utility
US 4,412,893 · App. 06/464,867
Anode-assisted cation reduction
Inventors:
Derek John Fray, John P. Chilton, Arthur V. Cooke
Patented Case
View Patent ↗
Granted: Nov 1, 1983
Filed: Feb 8, 1983
Inventors
Derek John Fray
John P. Chilton
Arthur V. Cooke
Assignee (at issue)
NATIONAL RESEARCH DEVELOPMENT 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.