Granted Patent
Utility
US 6,475,448 · App. 09/753,291
Method for the separation of ruthenium from noble metal solutions
Inventors:
Matthias Grehl, Horst Meyer, Dieter Schafer
Patented Case
View Patent ↗
Granted: Nov 5, 2002
Filed: Jan 2, 2001
Inventors
Matthias Grehl
Horst Meyer
Dieter Schafer
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.