Granted Patent
Utility
US 5,236,523 · App. 07/722,296
Silver- or silver-copper alloy-metal oxide composite material
Inventor:
Akira Shibata
Patented Case
View Patent ↗
Granted: Aug 17, 1993
Filed: Jun 27, 1991
Inventor
Akira Shibata
Assignees (at issue)
Akira Shibata
SUMITOMO METAL MINING CO., LTD.
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.