Granted Patent
Utility
US 4,702,998 · App. 06/843,181
Processing solution for light-sensitive silver halide photographic material comprises metal complexes of large polyamine derivatives
Inventors:
M. Tanaka, Kazuhiro Kobayashi, Shigeharu Koboshi
Patented Case
View Patent ↗
Granted: Oct 27, 1987
Filed: Mar 24, 1986
Inventors
M. Tanaka
Kazuhiro Kobayashi
Shigeharu Koboshi
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.