Granted Patent
Utility
US 6,703,473 · App. 10/038,953
Process for producing polycarbonate
Inventors:
Uwe Hucks, Kaspar Hallenberger, Silke Kratschmer, Michael Prein, Steffen Kuhling
Patented Case
View Patent ↗
Granted: Mar 9, 2004
Filed: Jan 2, 2002
Inventors
Uwe Hucks
Kaspar Hallenberger
Silke Kratschmer
Michael Prein
Steffen Kuhling
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.