Granted Patent
Utility
US 4,312,985 · App. 06/182,732
Disperse dyes from heterocyclic acetonitriles
Inventor:
Keith Hunt
Patented Case
View Patent ↗
Granted: Jan 26, 1982
Filed: Aug 29, 1980
Inventor
Keith Hunt
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.