Granted Patent
Utility
US 5,304,346 · App. 07/965,514
Welding material for low coefficient of thermal expansion alloys
Inventors:
David B. O'Donnell, Robert A. Bishel
Patented Case
View Patent ↗
Granted: Apr 19, 1994
Filed: Oct 23, 1992
Inventors
David B. O'Donnell
Robert A. Bishel
Assignee (at issue)
INCO Alloys International, 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.