Granted Patent
Utility
US 5,241,019 · App. 07/729,212
Binder for dry toner
Inventors:
Tateo Otsuki, Kazuya Tsukamoto, Nobuhiro Hirayama
Patented Case
View Patent ↗
Granted: Aug 31, 1993
Filed: Jul 12, 1991
Inventors
Tateo Otsuki
Kazuya Tsukamoto
Nobuhiro Hirayama
Assignee (at issue)
Mitsui Toatsu Chemicals, Incorporated
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.