Granted Patent
Utility
US 6,562,080 · App. 09/930,651
Primary intermediates for oxidative coloration of hair
Inventors:
Mu-III Lim, Yuh-Guo Pan
Patented Case
View Patent ↗
Granted: May 13, 2003
Filed: Aug 15, 2001
Inventors
Mu-III Lim
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.