Granted Patent
Utility
US 4,647,821 · App. 06/647,080
Compact mercury-free fluorescent lamp
Inventors:
Walter P. Lapatovich, George R. Gibbs, Joseph M. Proud
Patented Case
View Patent ↗
Granted: Mar 3, 1987
Filed: Sep 4, 1984
Inventors
Walter P. Lapatovich
George R. Gibbs
Joseph M. Proud
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.