Granted Patent
Utility
US 4,407,938 · App. 06/369,362
Photographic element with lactone polymer
Inventors:
Noboru Mizukura, Mikio Koyama
Patented Case
View Patent ↗
Granted: Oct 4, 1983
Filed: Apr 19, 1982
Inventors
Noboru Mizukura
Mikio Koyama
Assignee (at issue)
Konishiroku Photo Ind. 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.