Granted Patent
Utility
US 5,360,581 · App. 08/063,020
Stable conditioning shampoo containing polyethyleneimine and a fatty acid
Inventors:
Riaz Rizvi, Chaitanya Patel
Patented Case
View Patent ↗
Granted: Nov 1, 1994
Filed: May 17, 1993
Inventors
Riaz Rizvi
Chaitanya Patel
Assignee (at issue)
Helene Curtis, 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.