Granted Patent
Utility
US 5,988,180 · App. 08/815,695
Leave-on oxidizing solution for permanent waving of hair and a process for permanent waving of hair
Inventor:
Joan M. Bergstrom
Patented Case
View Patent ↗
Granted: Nov 23, 1999
Filed: Mar 12, 1997
Inventor
Joan M. Bergstrom
Assignee (at issue)
Zotos International, 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.