Granted Patent
Utility
US 6,777,384 · App. 10/140,146
Gemini surfactants
Inventors:
Hans-Christian Raths, Manfred Weuthen, Michael Elsner
Patented Case
View Patent ↗
Granted: Aug 17, 2004
Filed: May 6, 2002
Inventors
Hans-Christian Raths
Manfred Weuthen
Michael Elsner
Assignee (at issue)
Cognis Deutschland GmbH & Co. KG
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.