Granted Patent
Utility
US 4,834,767 · App. 07/060,284
Compositions used in permanent alteration of hair color
Inventors:
Michael W. Helioff, Carmen D. Bires, Robert B. Login
Patented Case
View Patent ↗
Granted: May 30, 1989
Filed: Jun 10, 1987
Inventors
Michael W. Helioff
Carmen D. Bires
Robert B. Login
Assignee (at issue)
GAF 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.