Granted Patent
Utility
US 4,440,799 · App. 06/435,971
Monitor for impurity levels in aluminum deposition
Inventor:
Thomas J. Faith, Jr.
Patented Case
View Patent ↗
Granted: Apr 3, 1984
Filed: Oct 22, 1982
Inventor
Thomas J. Faith, Jr.
Assignee (at issue)
RCA 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.