Granted Patent
Utility
US 5,578,285 · App. 08/359,803
Process for reducing the average particle size of ammonium paratungstate powders
Inventor:
Thomas A. Wolfe
Patented Case
View Patent ↗
Granted: Nov 26, 1996
Filed: Dec 20, 1994
Inventor
Thomas A. Wolfe
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.