Granted Patent
Utility
US 5,635,146 · App. 08/565,334
Method for the dissolution and purification of tantalum pentoxide
Inventors:
Raj Pal Singh, Michael J. Miller
Patented Case
View Patent ↗
Granted: Jun 3, 1997
Filed: Nov 30, 1995
Inventors
Raj Pal Singh
Michael J. Miller
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.