Granted Patent
Utility
US 6,767,943 · App. 09/937,469
Flame-resistant polycarbonate moulding materials modified with graft polymers
Inventors:
Thomas Eckel, Michael Zobel, Dieter Wittmann, Torsten Derr, Bernd Keller
Patented Case
View Patent ↗
Granted: Jul 27, 2004
Filed: Sep 25, 2001
Inventors
Thomas Eckel
Michael Zobel
Dieter Wittmann
Torsten Derr
Bernd Keller
Assignee (at issue)
Bayer Aktiengesellschaft
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.