Granted Patent
Utility
US 6,707,929 · App. 09/844,585
Method for analyzing hair and predicting achievable hair dyeing ending colors
Inventors:
Suresh Bandara Marapane, Ke Ming Quan, David Walter
Patented Case
View Patent ↗
Granted: Mar 16, 2004
Filed: Apr 27, 2001
Inventors
Suresh Bandara Marapane
Ke Ming Quan
David Walter
Assignee (at issue)
The Procter & Gamble 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.