Granted Patent
Utility
US 6,375,923 · App. 09/500,207
Processing titaniferous ore to titanium dioxide pigment
Inventors:
Willem P. C. Duyvesteyn, Bruce J. Sabacky, Dirk Verhulst, Paul George West-Sells, Timothy Spitler, Andrew Vince, James R. Burkholder, Bernardus Josephus Paulus Maria Huls
Patented Case
View Patent ↗
Granted: Apr 23, 2002
Filed: Feb 7, 2000
Inventors
Willem P. C. Duyvesteyn
Bruce J. Sabacky
Dirk Verhulst
Paul George West-Sells
Timothy Spitler
Andrew Vince
James R. Burkholder
Bernardus Josephus Paulus Maria Huls
Assignee (at issue)
Altair Nanomaterials, 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.