Granted Patent
Utility
US 4,596,765 · App. 06/677,851
Composition of a photographic color forming agent
Inventors:
Masayuki Kurematsu, Shigeharu Koboshi
Patented Case
View Patent ↗
Granted: Jun 24, 1986
Filed: Dec 4, 1984
Inventors
Masayuki Kurematsu
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.