Granted Patent
Utility
US 4,243,909 · App. 06/001,117
Fluorescent lamp alkaline earth halophosphate phosphor with protective NaCs.sub.2 PrCl.sub.6 coating
Inventors:
Charles Brecher, Daniel W. Oblas
Patented Case
View Patent ↗
Granted: Jan 6, 1981
Filed: Jan 5, 1979
Inventors
Charles Brecher
Daniel W. Oblas
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.