Granted Patent
Utility
US 6,552,091 · App. 09/645,749
Block-copolymeric polyalkylene oxides containing styrene oxide, obtained by alkoxylation, and their use
Inventors:
Tammo Boinowitz, Ellen Reuter, Stefan Silber, Joachim Venzmer
Patented Case
View Patent ↗
Granted: Apr 22, 2003
Filed: Aug 24, 2000
Inventors
Tammo Boinowitz
Ellen Reuter
Stefan Silber
Joachim Venzmer
Assignee (at issue)
GOLDSCHMIDT HOLDING 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.