Granted Patent
Utility
US 6,136,062 · App. 09/400,399
Niobium powder and a process for the production of niobium and/or tantalum powders
Inventors:
Josua Löffelholz, Frank Herman Behrens
Patented Case
View Patent ↗
Granted: Oct 24, 2000
Filed: Sep 21, 1999
Inventors
Josua Löffelholz
Frank Herman Behrens
Assignee (at issue)
H. C. Starck GmbH & Co. KG
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.