Granted Patent
Utility
US 4,647,399 · App. 06/859,846
Process for producing Ce-Mn coactivated fluoroapatite phosphors as the yellow emitting component for high efficacy lamp blends
Inventors:
Thomas E. Peters, Romano G. Pappalardo
Patented Case
View Patent ↗
Granted: Mar 3, 1987
Filed: Apr 30, 1986
Inventors
Thomas E. Peters
Romano G. Pappalardo
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.