Granted Patent
Utility
US 6,440,376 · App. 09/595,185
Method for dissolving noble metals out of segregated ores containing noble metals
Inventors:
Martin Stettner, Matthias Grehl, Horst Meyer
Patented Case
View Patent ↗
Granted: Aug 27, 2002
Filed: Jun 16, 2000
Inventors
Martin Stettner
Matthias Grehl
Horst Meyer
Assignee (at issue)
W.C. Heraeus 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.