Granted Patent
Utility
US 5,648,115 · App. 08/518,446
Method for making a tantala/silica interference filter on a vitreous substrate and an electric lamp made thereby
Inventors:
Gautam Bandyopadhyay, Keith A. Klinedinst, Silvia E. Lichtensteiger
Patented Case
View Patent ↗
Granted: Jul 15, 1997
Filed: Aug 23, 1995
Inventors
Gautam Bandyopadhyay
Keith A. Klinedinst
Silvia E. Lichtensteiger
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.