Granted Patent
Utility
US 6,414,074 · App. 09/468,781
Aqueous suspensions of mineral materials and their uses
Inventor:
René Vinzenz Blum
Patented Case
View Patent ↗
Granted: Jul 2, 2002
Filed: Dec 21, 1999
Inventor
René Vinzenz Blum
Assignee (at issue)
PLUESS-STAUFER AG
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.