Granted Patent
Utility
US 4,314,023 · App. 06/210,135
Photographic silver halide materials containing yellow coupler
Inventors:
Tamotsu Kojima, Hiroyuki Imamura, Mitsuto Fujiwhara, Wataru Fujimatsu, Takaya Endo
Patented Case
View Patent ↗
Granted: Feb 2, 1982
Filed: Nov 24, 1980
Inventors
Tamotsu Kojima
Hiroyuki Imamura
Mitsuto Fujiwhara
Wataru Fujimatsu
Takaya Endo
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.