Granted Patent
Utility
US 4,368,257 · App. 06/225,137
Method for forming a cyan dye image
Inventors:
Yasushi Usagawa, Wataru Fujimatsu, Osamu Sasaki, Katsumi Matsuura
Patented Case
View Patent ↗
Granted: Jan 11, 1983
Filed: Jan 14, 1981
Inventors
Yasushi Usagawa
Wataru Fujimatsu
Osamu Sasaki
Katsumi Matsuura
Assignee (at issue)
Konishiroku Photo Industry Co., Ltd.
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.