Granted Patent
Utility
US 6,669,521 · App. 09/963,762
Method of removing contaminants from a double-ended arc discharge tube
Inventor:
Ernest Davey
Patented Case
View Patent ↗
Granted: Dec 30, 2003
Filed: Sep 26, 2001
Inventor
Ernest Davey
Assignee (at issue)
OSRAM 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.