Granted Patent
Utility
US 4,892,790 · App. 06/805,887
Oxidation-inhibited carbonous materials
Inventor:
Paul Edward Gray
Patented Case
View Patent ↗
Granted: Jan 9, 1990
Filed: Dec 6, 1985
Inventor
Paul Edward Gray
Assignee (at issue)
General Atomics
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.