Granted Patent
Utility
US 4,306,173 · App. 06/135,951
Phosphor with extended fluorescence decay lifetime and lamp based thereon
Inventors:
Romano G. Pappalardo, Charles F. Chenot
Patented Case
View Patent ↗
Granted: Dec 15, 1981
Filed: Mar 31, 1980
Inventors
Romano G. Pappalardo
Charles F. Chenot
Assignees (at issue)
GTE Laboratories Incorporated
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.