Granted Patent
Utility
US 4,840,886 · App. 07/161,321
Silver halide color photographic material containing a 1h-pyrazole (3,2-C)-s-triazole derived magenta coupler
Inventors:
Toshifumi Iijima, Kenji Kumashiro, Hiroshi Kashiwagi, Koichi Hatta, Yuji Hotta, Hiroko Ohya, Noritaka Nakayama, Satoshi Kawakatsu, Katsunori Katoh, Kaoru Shinozaki
Patented Case
View Patent ↗
Granted: Jun 20, 1989
Filed: Feb 26, 1988
Inventors
Toshifumi Iijima
Kenji Kumashiro
Hiroshi Kashiwagi
Koichi Hatta
Yuji Hotta
Hiroko Ohya
Noritaka Nakayama
Satoshi Kawakatsu
Katsunori Katoh
Kaoru Shinozaki
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.