Granted Patent
Utility
US 4,567,136 · App. 06/618,311
Analytical element
Inventors:
Kenichiro Okaniwa, Mikio Koyama, Shozo Kikugawa
Patented Case
View Patent ↗
Granted: Jan 28, 1986
Filed: Jun 7, 1984
Inventors
Kenichiro Okaniwa
Mikio Koyama
Shozo Kikugawa
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.