Granted Patent
Utility
US 4,427,921 · App. 06/307,419
Electrodeless ultraviolet light source
Inventors:
Joseph M. Proud, Stephen Johnson
Patented Case
View Patent ↗
Granted: Jan 24, 1984
Filed: Oct 1, 1981
Inventors
Joseph M. Proud
Stephen Johnson
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.