Granted Patent
Utility
US 6,624,278 · App. 10/008,164
Process for producing thermally stable thermoplastic polyurethanes
Inventors:
Friedemann Muller, Wolfgang Brauer, Hans-Georg Hoppe, Hans-Georg Wussow, Hans Wagner
Patented Case
View Patent ↗
Granted: Sep 23, 2003
Filed: Dec 3, 2001
Inventors
Friedemann Muller
Wolfgang Brauer
Hans-Georg Hoppe
Hans-Georg Wussow
Hans Wagner
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.