Granted Patent
Utility
US 6,232,718 · App. 09/260,103
Ceramic feedthroughs for discharge lamps
Inventors:
David W. Johnston, Joseph A. Olsen
Patented Case
View Patent ↗
Granted: May 15, 2001
Filed: Mar 2, 1999
Inventors
David W. Johnston
Joseph A. Olsen
Assignee (at issue)
Osray Sylvania Inc.
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.