ALEXANDRIA, Va., Jan. 20 -- United States Patent no. 12,529,971, issued on Jan. 20, was assigned to CANON K.K. (Tokyo).
"Process cartridge" was invented by Tatsuya Saeki (Shizuoka, Japan), Takashi Kenmoku (Shizuoka, Japan), Kozue Uratani (Shizuoka, Japan), Koki Inoue (Shizuoka, Japan) and Kunihiko Sekido (Shizuoka, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "Provided is a process cartridge that is excellent in initial charge rising performance, and in charge uniformity of a halftone image throughout a long period of time from the start of use until after endurance. Specifically, provided is a process cartridge including: an electrophotographic photosensitive member; a toner; and a developing unit, w...