Granted Patent
Utility
US 4,400,318 · App. 06/318,189
Substituted 5-acyl-3-carbamoyl-2-thienyl azo dyes with aniline, tetrahydroquinoline, and benzomorpholine couplers, process of manufacture, and polyamide testile materials dyed therewith
Inventors:
Max A. Weaver, Clarence A. Coates, Jr.
Patented Case
View Patent ↗
Granted: Aug 23, 1983
Filed: Nov 4, 1981
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.