Granted Patent
Utility
US 4,263,277 · App. 06/050,359
Cold permanent wave composition and method containing 2-iminothiolane
Inventors:
Uma Tripathi, Diana K. Tomaszewicz
Patented Case
View Patent ↗
Granted: Apr 21, 1981
Filed: Jun 20, 1979
Inventors
Uma Tripathi
Diana K. Tomaszewicz
Assignee (at issue)
American Cyanamid 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.