Granted Patent
Utility
US 6,552,092 · App. 10/068,522
Defoamers for aqueous media
Inventors:
Thomas Ebbrecht, Michael Gippert, Martina Hartmann, Wolfgang Josten, Peter Muss, Stefan Silber, Roland Sucker
Patented Case
View Patent ↗
Granted: Apr 22, 2003
Filed: Feb 5, 2002
Inventors
Thomas Ebbrecht
Michael Gippert
Martina Hartmann
Wolfgang Josten
Peter Muss
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.