Granted Patent
Utility
US 4,990,419 · App. 07/497,823
Function separation type electrophotographic photoreceptor comprising arsenic, selenium and tellurium
Inventor:
Seizou Kitagawa
Patented Case
View Patent ↗
Granted: Feb 5, 1991
Filed: Mar 22, 1990
Inventor
Seizou Kitagawa
Assignee (at issue)
FUJI ELECTRIC 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.