Granted Patent
Utility
US 4,745,323 · App. 06/833,857
Compact fluorescent lamp with outer envelope
Inventors:
Donald P. Northrop, Arpad Pirovic
Patented Case
View Patent ↗
Granted: May 17, 1988
Filed: Feb 26, 1986
Inventors
Donald P. Northrop
Arpad Pirovic
Assignee (at issue)
Duro-Test 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.