Granted Patent
Utility
US 4,986,983 · App. 07/332,698
Superfatted betaine and zwitterionic hair and skin conditioner compositions
Inventor:
Terry Gerstein
Patented Case
View Patent ↗
Granted: Jan 22, 1991
Filed: Apr 3, 1989
Inventor
Terry Gerstein
Assignee (at issue)
Revlon
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.