Granted Patent
Utility
US 4,569,922 · App. 06/558,896
Silicon carbide-aluminum nitride sintered article and process for its production
Inventor:
Keiichiro Suzuki
Patented Case
View Patent ↗
Granted: Feb 11, 1986
Filed: Dec 7, 1983
Inventor
Keiichiro Suzuki
Assignee (at issue)
ASAHI GLASS CO., LTD.
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.