Granted Patent
Utility
US 6,231,799 · App. 09/251,618
Use of thermoplastic polymethylmethacrylate molding compositions
Inventors:
Peter Kempf, Norbert Brand, Helmut Schwind, Stefan Roth, Holger Moritz
Patented Case
View Patent ↗
Granted: May 15, 2001
Filed: Feb 17, 1999
Inventors
Peter Kempf
Norbert Brand
Helmut Schwind
Stefan Roth
Holger Moritz
Assignee (at issue)
Roehm GmbH
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.