Granted Patent
Utility
US 4,511,340 · App. 06/451,567
Method of forming hot cathodes
Inventor:
Eberhard Weiss
Patented Case
View Patent ↗
Granted: Apr 16, 1985
Filed: Dec 20, 1982
Inventor
Eberhard Weiss
Assignee (at issue)
International Standard Electric 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.