Granted Patent
Utility
US 5,554,478 · App. 08/273,185
Electrophotographic dry toner
Inventors:
Shinichi Kuramoto, Yoshihisa Okamoto, Yasuo Asahina, Michio Izumi, Hidefumi Gohhara, Chiharu Mochizuki, Tomomi Suzuki, Hideo Nakamura, Masaru Wakisaka
Patented Case
View Patent ↗
Granted: Sep 10, 1996
Filed: Jul 11, 1994
Inventors
Shinichi Kuramoto
Yoshihisa Okamoto
Yasuo Asahina
Michio Izumi
Hidefumi Gohhara
Chiharu Mochizuki
Tomomi Suzuki
Hideo Nakamura
Masaru Wakisaka
Assignees (at issue)
RICOH COMPANY, LTD.
Mitsui Petrochemical Industries, 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.