Granted Patent
Utility
US 4,842,971 · App. 07/030,694
Photoreceptor for electrophotography having a hydroxystyrene subbing layer
Inventors:
Takayuki Sugaiwa, Akira Kinoshita, Kiyoshi Sawada
Patented Case
View Patent ↗
Granted: Jun 27, 1989
Filed: Mar 25, 1987
Inventors
Takayuki Sugaiwa
Akira Kinoshita
Kiyoshi Sawada
Assignee (at issue)
Konishiroku Photo Industry Co., 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.