Granted Patent
Utility
US 4,295,074 · App. 06/022,617
Mercury arc lamp having communicating mercury reservoir
Inventor:
Frank R. Ragland, Jr.
Patented Case
View Patent ↗
Granted: Oct 13, 1981
Filed: Mar 21, 1979
Inventor
Frank R. Ragland, Jr.
Assignee (at issue)
RCA 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.