Granted Patent
Utility
US 5,300,665 · App. 07/946,269
Process for preparing fatty acid esters and amides of sulfonic acid salts
Inventors:
David J. Tracy, Mitchell B. Ferguson, Gordon Wall
Patented Case
View Patent ↗
Granted: Apr 5, 1994
Filed: Sep 16, 1992
Inventors
David J. Tracy
Mitchell B. Ferguson
Gordon Wall
Assignee (at issue)
Rhone-Poulenc Surfactants & Specialties, L.P.
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.