Granted Patent
Utility
US 4,892,807 · App. 07/079,214
Silver halide photographic light-sensitive material excellent in treatment stability
Inventors:
Shigeto Hirabayashi, Hirokazu Sato, Eiichi Sakamoto
Patented Case
View Patent ↗
Granted: Jan 9, 1990
Filed: Jul 29, 1987
Inventors
Shigeto Hirabayashi
Hirokazu Sato
Eiichi Sakamoto
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.