Granted Patent
Utility
US 4,285,727 · App. 06/103,609
Ink compositions for ink jet recoding
Inventors:
Masafumi Uehara, Mitsuyoshi Itano
Patented Case
View Patent ↗
Granted: Aug 25, 1981
Filed: Dec 14, 1979
Inventors
Masafumi Uehara
Mitsuyoshi Itano
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.