Granted Patent
Utility
US 6,541,602 · App. 09/806,730
Conjugated polymers containing 2,7 fluorenyl units with improved properties
Inventors:
Hubert Spreitzer, Heinrich Becker, Willi Kreuder
Patented Case
View Patent ↗
Granted: Apr 1, 2003
Filed: May 2, 2001
Inventors
Hubert Spreitzer
Heinrich Becker
Willi Kreuder
Assignee (at issue)
Celanese Ventures 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.