Granted Patent
Utility
US 6,287,578 · App. 09/312,221
Condensation products containing polyether-modified monoesters and/or -amides of .alpha., .beta.-unsaturated dicarboxylic acids, their preparation and use
Inventors:
Michael Duetsch, Burghard Gruning, Jorg Simpelkamp, Christian Weitemeyer
Patented Case
View Patent ↗
Granted: Sep 11, 2001
Filed: May 14, 1999
Inventors
Michael Duetsch
Burghard Gruning
Jorg Simpelkamp
Christian Weitemeyer
Assignee (at issue)
Th. Goldschmidt. AG
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.