Granted Patent
Utility
US 5,952,291 · App. 09/055,368
Process for the preparation of high purity imidazoline based amphoacetate surfactants
Inventors:
Bharat Desai, Peter Lees, Jean-Marc Ricca, David J. Tracy
Patented Case
View Patent ↗
Granted: Sep 14, 1999
Filed: Apr 6, 1998
Inventors
Bharat Desai
Peter Lees
Jean-Marc Ricca
David J. Tracy
Assignee (at issue)
Rhodia, Inc.
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.