Granted Patent
Utility
US 4,837,073 · App. 07/031,626
Barrier coating and penetrant providing oxidation protection for carbon-carbon materials
Inventors:
Lawrence E. McAllister, Norman E. Jannasch
Patented Case
View Patent ↗
Granted: Jun 6, 1989
Filed: Mar 30, 1987
Inventors
Lawrence E. McAllister
Norman E. Jannasch
Assignee (at issue)
AlliedSignal, 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.