Granted Patent
Utility
US 6,315,989 · App. 09/470,392
Water in oil microemulsion peroxide compositions for use in coloring hair and related methods
Inventors:
Saroja Narasimhan, Alexander Chan, Dalal Ibrahim Duffer, Geoffrey Hawkins
Patented Case
View Patent ↗
Granted: Nov 13, 2001
Filed: Dec 22, 1999
Inventors
Saroja Narasimhan
Alexander Chan
Dalal Ibrahim Duffer
Geoffrey Hawkins
Assignee (at issue)
Revlon Consumer Products Corporation
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.