Granted Patent
Utility
US 4,459,229 · App. 06/501,223
Heterocyclic azo dyes with couplers having sulfoaralkyl groups
Inventors:
Max A. Weaver, Clarence A. Coates, Jr.
Patented Case
View Patent ↗
Granted: Jul 10, 1984
Filed: Jun 6, 1983
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.