Granted Patent
Utility
US 5,744,441 · App. 08/689,954
Enhanced performance of amphoteric surfactants
Inventors:
Allen D. Urfer, Michael W. Counts
Patented Case
View Patent ↗
Granted: Apr 28, 1998
Filed: Aug 16, 1996
Inventors
Allen D. Urfer
Michael W. Counts
Assignee (at issue)
Henkel Limited
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.