Granted Patent
Utility
US 4,492,898 · App. 06/402,175
Mercury-free discharge lamp
Inventors:
Walter P. Lapatovich, George R. Gibbs
Patented Case
View Patent ↗
Granted: Jan 8, 1985
Filed: Jul 26, 1982
Inventors
Walter P. Lapatovich
George R. Gibbs
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.