Granted Patent
Utility
US 6,572,665 · App. 09/990,749
Coupler for use in oxidative hair dyeing
Inventors:
Mu-Ill Lim, Yuh-Guo Pan, Margaret Popp
Patented Case
View Patent ↗
Granted: Jun 3, 2003
Filed: Nov 16, 2001
Inventors
Mu-Ill Lim
Yuh-Guo Pan
Margaret Popp
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.