Granted Patent
Utility
US 4,449,985 · App. 06/392,483
Dye compositions containing partially hydrolyzed polyvinyl ester
Inventor:
Joseph R. Ditzer, Jr.
Patented Case
View Patent ↗
Granted: May 22, 1984
Filed: Jun 28, 1982
Inventor
Joseph R. Ditzer, 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.