Granted Patent
Utility
US 4,508,563 · App. 06/591,293
Reducing the oxygen content of tantalum
Inventors:
Walter J. Bernard, Richard J. Millard
Patented Case
View Patent ↗
Granted: Apr 2, 1985
Filed: Mar 19, 1984
Inventors
Walter J. Bernard
Richard J. Millard
Assignee (at issue)
Sprague Electric 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.