Granted Patent
Utility
US 6,547,833 · App. 09/791,535
Two-part aqueous composition for oxidative coloration of hair
Inventors:
Stephen Casperson, Zubaida Khan, Slavica Grogin, Kue-Yick Lee
Patented Case
View Patent ↗
Granted: Apr 15, 2003
Filed: Feb 23, 2001
Inventors
Stephen Casperson
Zubaida Khan
Slavica Grogin
Kue-Yick Lee
Assignee (at issue)
Clairol Incorporated
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.