Granted Patent
Utility
US 4,594,178 · App. 06/713,578
Process for producing a yellow emitting phosphor
Inventors:
Romano G. Pappalardo, John Walsh
Patented Case
View Patent ↗
Granted: Jun 10, 1986
Filed: Mar 18, 1985
Inventors
Romano G. Pappalardo
John Walsh
Assignee (at issue)
GTE Laboratories Incorporated
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.