Granted Patent
Utility
US 4,848,377 · App. 07/105,783
Article for permanent structure alteration of hair
Inventors:
Carmen D. Bires, Michael W. Helioff, Ratan K. Chaudhuri
Patented Case
View Patent ↗
Granted: Jul 18, 1989
Filed: Oct 8, 1987
Inventors
Carmen D. Bires
Michael W. Helioff
Ratan K. Chaudhuri
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.