Granted Patent
Utility
US 5,221,286 · App. 07/914,123
Cold mix emulsions used as a developer composition for oxidative hair dyes and for hair bleaches
Inventors:
A. H. Singleton, S. N. Porter
Patented Case
View Patent ↗
Granted: Jun 22, 1993
Filed: Jul 17, 1992
Inventors
A. H. Singleton
S. N. Porter
Assignee (at issue)
EASTMAN KODAK 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.