Granted Patent
Utility
US 6,433,028 · App. 09/569,901
Use of water-insoluble polyoxyalkylene-polysiloxane block copolymers for defoaming aqueous media
Inventors:
Thomas Ebbrecht, Wolfgang Josten, Michael Keup, Stefan Silber, Roland Sucker
Patented Case
View Patent ↗
Granted: Aug 13, 2002
Filed: May 11, 2000
Inventors
Thomas Ebbrecht
Wolfgang Josten
Michael Keup
Stefan Silber
Roland Sucker
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.