Granted Patent
Utility
US 4,264,495 · App. 05/253,633
2-Thienyl azo dyestuff compounds
Inventors:
Ronald J. Maher, John Fisher, Max A. Weaver
Patented Case
View Patent ↗
Granted: Apr 28, 1981
Filed: May 15, 1972
Inventors
Ronald J. Maher
John Fisher
Max A. Weaver
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.