Granted Patent
Utility
US 4,528,368 · App. 06/606,490
Azo dyes from 2-amino-5-cyanomethylthio-1,3,4-thiadiazole and aniline and tetrahydroquinoline couplers
Inventors:
Max A. Weaver, Clarence A. Coates, Jr.
Patented Case
View Patent ↗
Granted: Jul 9, 1985
Filed: May 3, 1984
Inventors
Max A. Weaver
Clarence A. Coates, Jr.
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.