Granted Patent
Utility
US 4,954,410 · App. 07/315,051
Color toner composition
Inventors:
Keisuke Takuma, Tsukasa Ohyama, Isamu Ghoda, Tamio Mikoda, Hitoshi Koshida, Akitoshi Igata
Patented Case
View Patent ↗
Granted: Sep 4, 1990
Filed: Feb 24, 1989
Inventors
Keisuke Takuma
Tsukasa Ohyama
Isamu Ghoda
Tamio Mikoda
Hitoshi Koshida
Akitoshi Igata
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.