Granted Patent
Utility
US 6,540,793 · App. 09/732,485
Coupler for use in oxidative hair dyeing
Inventors:
Mu-lll Lim, Linas R. Stasaitis, Yuh-Guo Pan
Patented Case
View Patent ↗
Granted: Apr 1, 2003
Filed: Dec 7, 2000
Inventors
Mu-lll Lim
Linas R. Stasaitis
Yuh-Guo Pan
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.