Granted Patent
Utility
US 4,738,917 · App. 06/863,604
Method for color-developing a silver halide photographic light-sensitive material with a color developer containing an n-hydroxyalkyl-p-phenylenediamine derivative
Inventors:
Shigeharu Koboshi, Satoru Kuse, Kazuhiro Kobayashi, Masao Ishikawa, Masayuki Kurematsu
Patented Case
View Patent ↗
Granted: Apr 19, 1988
Filed: May 15, 1986
Inventors
Shigeharu Koboshi
Satoru Kuse
Kazuhiro Kobayashi
Masao Ishikawa
Masayuki Kurematsu
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.