Granted Patent
Utility
US 4,472,169 · App. 06/368,239
Mixtures of azo dyes from 2-amino-3-nitro-5-acyl thiophenes and certain aniline couplers
Inventors:
Leslie Shuttleworth, Michael H. Kearns, Robert Gourley
Patented Case
View Patent ↗
Granted: Sep 18, 1984
Filed: Apr 14, 1982
Inventors
Leslie Shuttleworth
Michael H. Kearns
Robert Gourley
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.