Granted Patent
Utility
US 5,470,549 · App. 08/361,415
Method of making tungsten-copper composite oxides
Inventors:
Leonid P. Dorfman, Michael J. Scheithauer, David L. Houck, Nelson E. Kopatz
Patented Case
View Patent ↗
Granted: Nov 28, 1995
Filed: Dec 22, 1994
Inventors
Leonid P. Dorfman
Michael J. Scheithauer
David L. Houck
Nelson E. Kopatz
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.