Granted Patent
Utility
US 6,669,933 · App. 09/852,982
Method and compositions for coloring hair
Inventors:
Dalal Ibrahim Duffer, Louann Christine Vena, Minmin Tian, Shailendra Singh
Patented Case
View Patent ↗
Granted: Dec 30, 2003
Filed: May 10, 2001
Inventors
Dalal Ibrahim Duffer
Louann Christine Vena
Minmin Tian
Shailendra Singh
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.