Granted Patent
Utility
US 4,301,070 · App. 06/100,626
Azo dyes from a 5-aminopyrazole bearing 1 to 2 sulfated hydroxyalkoxycarbonyl or N-(hydroxyalkyl) carbamoyl groups on its ring
Inventors:
Ralph R. Giles, Max A. Weaver
Patented Case
View Patent ↗
Granted: Nov 17, 1981
Filed: Dec 5, 1979
Inventors
Ralph R. Giles
Max A. Weaver
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.