Granted Patent
Utility
US 4,304,844 · App. 06/145,685
Method for forming a cyan dye image
Inventors:
Wataru Fujimatsu, Yasushi Usagawa, Osamu Sasaki, Katsumi Matsuura
Patented Case
View Patent ↗
Granted: Dec 8, 1981
Filed: May 1, 1980
Inventors
Wataru Fujimatsu
Yasushi Usagawa
Osamu Sasaki
Katsumi Matsuura
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.