Granted Patent
Utility
US 4,925,593 · App. 07/303,599
Method for producing cadmium free green emitting CRT phosphor
Inventors:
Richard R. Borchardt, Richard G. W. Gingerich, Michael J. Miller
Patented Case
View Patent ↗
Granted: May 15, 1990
Filed: Jan 27, 1989
Inventors
Richard R. Borchardt
Richard G. W. Gingerich
Michael J. Miller
Assignee (at issue)
GTE Products 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.