Granted Patent
Utility
US 6,074,438 · App. 09/033,632
Hair dyeing compositions containing 2-chloro- and 2,6-dichloro-4-aminophenol and phenylpyrazolones
Inventors:
Mu-Ill Lim, Yuh-Guo Pan, Linas R. Stasaitis
Patented Case
View Patent ↗
Granted: Jun 13, 2000
Filed: Mar 3, 1998
Inventors
Mu-Ill Lim
Yuh-Guo Pan
Linas R. Stasaitis
Assignee (at issue)
BRISTOL-MYERS SQUIBB COMPANY
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.