Granted Patent
Utility
US 6,020,685 · App. 08/883,852
Lamp with radially graded cermet feedthrough assembly
Inventors:
George C. Wei, Stefan Juengst
Patented Case
View Patent ↗
Granted: Feb 1, 2000
Filed: Jun 27, 1997
Inventors
George C. Wei
Stefan Juengst
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.