Granted Patent
Utility
US 4,446,049 · App. 06/435,846
Yellow-emitting halophosphate phosphor of improved brightness and method
Inventors:
Romano G. Pappalardo, Thomas E. Peters
Patented Case
View Patent ↗
Granted: May 1, 1984
Filed: Oct 21, 1982
Inventors
Romano G. Pappalardo
Thomas E. Peters
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.