Granted Patent
Utility
US 4,138,257 · App. 05/792,559
Process for the treatment of photographic materials
Inventors:
Isamu Fushiki, Sigeharu Koboshi, Sadatugu Terada
Patented Case
View Patent ↗
Granted: Feb 6, 1979
Filed: May 2, 1977
Inventors
Isamu Fushiki
Sigeharu Koboshi
Sadatugu Terada
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.