Granted Patent
Utility
US 5,852,113 · App. 08/620,309
Preparation of thermoplastics
Inventors:
Norbert Güntherberg, Jurgen Hofmann, Elmar Mailahn, Hilmar Ohlig, Sven Grabowski, Bernhard Czauderna, Klaus Bus
Patented Case
View Patent ↗
Granted: Dec 22, 1998
Filed: Mar 22, 1996
Inventors
Norbert Güntherberg
Jurgen Hofmann
Elmar Mailahn
Hilmar Ohlig
Sven Grabowski
Bernhard Czauderna
Klaus Bus
Assignee (at issue)
BASF SE
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.