Granted Patent
Utility
US 4,755,327 · App. 06/935,658
Isotropic laundry detergents containing polymeric quaternary ammonium salts
Inventors:
Ernest Bernarducci, Kenneth A. Harrison
Patented Case
View Patent ↗
Granted: Jul 5, 1988
Filed: Nov 26, 1986
Inventors
Ernest Bernarducci
Kenneth A. Harrison
Assignee (at issue)
Sterling Drug, 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.