Granted Patent
Utility
US 6,765,046 · App. 09/341,669
Process for producing polymethylmethacrylate molding materials with a neutral color
Inventors:
Uwe Numrich, Michael Wicker, Klaus Albrecht, Heinz Vetter, Hermann Jaksch, Ernst Mohr
Patented Case
View Patent ↗
Granted: Jul 20, 2004
Filed: Sep 3, 1999
Inventors
Uwe Numrich
Michael Wicker
Klaus Albrecht
Heinz Vetter
Hermann Jaksch
Ernst Mohr
Assignee (at issue)
ROEHM 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.