Granted Patent
Utility
US 5,552,137 · App. 08/286,544
Biodegradable quaternary hair conditioners
Inventors:
Monna Manning, Andrea S. Allardice, Floyd E. Friedli
Patented Case
View Patent ↗
Granted: Sep 3, 1996
Filed: Aug 5, 1994
Inventors
Monna Manning
Andrea S. Allardice
Floyd E. Friedli
Assignee (at issue)
Witco Corporation
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.