Granted Patent
Utility
US 6,264,961 · App. 09/029,774
Oil-water emulsifiers
Inventors:
Achim Ansmann, Rolf Kawa, Helga Gondek, Josef Koester, Annette Kreisig
Patented Case
View Patent ↗
Granted: Jul 24, 2001
Filed: Mar 11, 1998
Inventors
Achim Ansmann
Rolf Kawa
Helga Gondek
Josef Koester
Annette Kreisig
Assignee (at issue)
Henkel Kommanditgesellschaft auf Aktien
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.