Granted Patent
Utility
US 5,534,036 · App. 08/357,745
Keratinous fiber dyeing methods and compositions which contain sulfated methaphenylenediamine couplers in combination with oxidation dye precursors
Inventors:
Alex Junino, Alain Lagrange, Alain Genet
Patented Case
View Patent ↗
Granted: Jul 9, 1996
Filed: Dec 16, 1994
Inventors
Alex Junino
Alain Lagrange
Alain Genet
Assignee (at issue)
L'OREAL
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.