Granted Patent
Utility
US 4,180,663 · App. 06/019,677
Methine dye synthesis
Inventor:
Mark D. Frishberg
Patented Case
View Patent ↗
Granted: Dec 25, 1979
Filed: Mar 12, 1979
Inventor
Mark D. Frishberg
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.