Granted Patent
Utility
US 5,891,815 · App. 07/287,233
Silica, boron nitride, aluminum nitride, alumina composite, article and method of making same
Inventors:
Gerald C. Dodds, Richard A. Tanzilli
Patented Case
View Patent ↗
Granted: Apr 6, 1999
Filed: Dec 21, 1988
Inventors
Gerald C. Dodds
Richard A. Tanzilli
Assignee (at issue)
LOCKHEED MARTIN CORPORATION
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.