Granted Patent
Utility
US 4,395,304 · App. 06/377,001
Selective etching of phosphosilicate glass
Inventors:
Werner Kern, George L. Schnable
Patented Case
View Patent ↗
Granted: Jul 26, 1983
Filed: May 11, 1982
Inventors
Werner Kern
George L. Schnable
Assignee (at issue)
RCA 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.