Granted Patent
Utility
US 4,637,971 · App. 06/700,671
Photoreceptor having polycarbonate layers and process for the preparation thereof
Inventors:
Yoshiaki Takei, Hiroyuki Nomori, Katumi Matuura
Patented Case
View Patent ↗
Granted: Jan 20, 1987
Filed: Feb 11, 1985
Inventors
Yoshiaki Takei
Hiroyuki Nomori
Katumi Matuura
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.