Granted Patent
Utility
US 4,497,771 · App. 06/472,702
Low tantalum content cobalt-base alloy
Inventors:
Robert E. Spencer, Donald L. Clarke
Patented Case
View Patent ↗
Granted: Feb 5, 1985
Filed: Mar 7, 1983
Inventors
Robert E. Spencer
Donald L. Clarke
Assignee (at issue)
Owens-Corning Fiberglas Corp.
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.