Granted Patent
Utility
US 4,247,458 · App. 06/010,348
Process for preparing azo dyes
Inventor:
Leslie Shuttleworth
Patented Case
View Patent ↗
Granted: Jan 27, 1981
Filed: Feb 8, 1979
Inventor
Leslie Shuttleworth
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.