Granted Patent
Utility
US 4,791,194 · App. 06/890,769
AZO compound photoreceptor having napthol substiuents
Inventors:
Tetsumi Suzuki, Tetsuo Murayama, Hitoshi Ono, Shinji Aramaki, Michiyo Yokoyama
Patented Case
View Patent ↗
Granted: Dec 13, 1988
Filed: Jul 25, 1986
Inventors
Tetsumi Suzuki
Tetsuo Murayama
Hitoshi Ono
Shinji Aramaki
Michiyo Yokoyama
Assignee (at issue)
Mitsubishi Chemical 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.