Granted Patent
Utility
US 5,332,570 · App. 07/963,168
Reducing solution for permanent wave
Inventors:
Joan M. Bergstrom, James Michael Wilmott
Patented Case
View Patent ↗
Granted: Jul 26, 1994
Filed: Oct 19, 1992
Inventors
Joan M. Bergstrom
James Michael Wilmott
Assignee (at issue)
Dow Brands Inc.
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.