Granted Patent
Utility
US 4,973,546 · App. 07/224,242
Light-sensitive silver halide photographic material improved in stability of dye image
Inventors:
Yutaka Kaneko, Kenzi Kadokura
Patented Case
View Patent ↗
Granted: Nov 27, 1990
Filed: Jul 26, 1988
Inventors
Yutaka Kaneko
Kenzi Kadokura
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.