Granted Patent
Utility
US 4,744,880 · App. 06/661,748
Anode for magnetic sputtering of gradient films
Inventors:
F. Howard Gillery, Russell C. Criss
Patented Case
View Patent ↗
Granted: May 17, 1988
Filed: Oct 17, 1984
Inventors
F. Howard Gillery
Russell C. Criss
Assignee (at issue)
PPG Industries, 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.