Granted Patent
Utility
US 4,407,749 · App. 06/383,885
AZO Dyes from 2-sulfonated, sulfated or thiosulfated organothiothiadiazole and aniline, tetrahydroquinoline, or benzomorpholine couplers
Inventors:
Max A. Weaver, Clarence A. Coates, Jr., John Fisher
Patented Case
View Patent ↗
Granted: Oct 4, 1983
Filed: Jun 1, 1982
Inventors
Max A. Weaver
Clarence A. Coates, Jr.
John Fisher
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.