Granted Patent
Utility
US 4,279,656 · App. 06/114,632
Light-transmitting silicon nitride
Inventors:
Charles D. Greskovich, Svante Prochazka, John A. Palm
Patented Case
View Patent ↗
Granted: Jul 21, 1981
Filed: Jan 23, 1980
Inventors
Charles D. Greskovich
Svante Prochazka
John A. Palm
Assignee (at issue)
General Electric Company
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.