Granted Patent
Utility
US 6,780,219 · App. 10/189,620
Method of spheridizing silicon metal powders
Inventors:
Raj Pal Singh, David L. Houck, Nelson E. Kopatz, Michael Robert Pierce, Scott A. Braymiller
Patented Case
View Patent ↗
Granted: Aug 24, 2004
Filed: Jul 3, 2002
Inventors
Raj Pal Singh
David L. Houck
Nelson E. Kopatz
Michael Robert Pierce
Scott A. Braymiller
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.