Granted Patent
Utility
US 4,278,747 · App. 06/033,401
Electrophotographic plate comprising a conductive substrate and a photosensitive layer containing an organic photoconductor layer composed of a hydrazone compound
Inventors:
Tetsuo Murayama, Shigenori Otsuka, Tsunemitsu Tajima
Patented Case
View Patent ↗
Granted: Jul 14, 1981
Filed: Apr 26, 1979
Inventors
Tetsuo Murayama
Shigenori Otsuka
Tsunemitsu Tajima
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.