Granted Patent
Utility
US 4,784,730 · App. 07/074,217
Cathodes suitable for use in electrochemical processes evolving hydrogen
Inventors:
Peter M. Willis, Ralph L. Phillips
Patented Case
View Patent ↗
Granted: Nov 15, 1988
Filed: Jul 16, 1987
Inventors
Peter M. Willis
Ralph L. Phillips
Assignee (at issue)
JOHNSON MATTHEY PUBLIC LIMITED 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.