1
Takaaki Ikegami, Eiji Kurimoto, Takashi Rokutanzono, Katsuichi Ohta, Masaomi Sasaki, Yasuo Suzuki, Kaoru Tadokoro, Megumi Kawahara, Masayuki Koyano: Electrophotographic photoconductor containing disazo and trisazo pigments. Ricoh Company, Oblon Spivak Mcclelland Maier & Neustadt P C, November 26, 1996: US05578405 (61 worldwide citation)

An electrophotographic photoconductor includes an electroconductive support and a single-layered photoconductive layer formed thereon, containing a charge transporting material, a binder resin, and a simultaneously pulverized mixture including at least one disazo pigment of formula (1) and at least ...


2
Takashi Rokutanzono, Yukio Ide, Hiroshi Nagame, Kohichi Ohshima, Narihito Kojima, Shinji Nousho: Electrophotographic photoconductor. Ricoh Company, Oblon Spivak McClelland Maier & Neustadt, April 16, 1991: US05008172 (29 worldwide citation)

An electrophotographic photoconductor is disclosed, which comprises an electroconductive substrate, a photoconductive layer formed on the electroconductive substrate, and a protective layer formed on the photoconductive layer, the protective layer comprising a binder resin and finely-divided particl ...


3
Takashi Rokutanzono, Tamotsu Aruga, Tatsuya Niimi, Yoshiaki Kawasaki: Electrophotographic photoreceptor, electrophotographic image forming method and apparatus using the photoreceptor. Ricoh Company, Oblon Spivak McClelland Maier & Neustadt P C, May 6, 2003: US06558863 (27 worldwide citation)

A photoreceptor including an electroconductive substrate and a photosensitive layer which is formed on the electroconductive substrate and which includes a charge generation material, wherein the charge generation material comprises an organic pigment and wherein the photosensitive layer further inc ...


4
Narihito Kojima, Hiroshi Nagame, Mitsuru Seto, Takashi Rokutanzono, Shinji Nousho: Electrophotographic photoconductor and electrophotographic copying process and apparatus using the photoconductor. Ricoh Company, Oblon Spivak McClelland Maier & Neustadt, September 15, 1992: US05147751 (26 worldwide citation)

An electrophotographic photoconductor comprises (a) an electroconductive support, (b) a photoconductive layer formed thereon comprising a selenium alloy, and (c) a protective layer which is formed on the photoconductive layer, contains a binder resin component and an anti-oxidizing agent. In an elec ...


5
Takaaki Ikegami, Takashi Rokutanzono, Eiji Kurimoto: Electrophotographic photoconductor containing a mixture of a phenol compound and an organic sulfur-containing compound. Ricoh Company, Oblon Spivak McClelland Maier & Neustadt P C, December 30, 1997: US05702855 (26 worldwide citation)

An electrophotographic photoconductor has an electroconductive support, and a single-layered photoconductive layer formed thereon containing a charge generation material, a charge transport material, a binder resin and a mixture of a phenol compound and an organic sulfur-containing compound.


6
Takashi Rokutanzono, Yukio Ide, Hiroshi Nagame, Kouichi Ohshima, Narihito Kojima, Shinji Nosho: Electrophotographic photoconductor having a silicone resin charge retention layer. Ricoh Company, Oblon Spivak McClelland Maier & Neustadt, September 18, 1990: US04957839 (21 worldwide citation)

An electrophotographic photoconductor is disclosed, which comprises an electroconductive layer, on which are formed in order, a photoconductive layer, a charge retention layer and a protective layer, optionally an adhesive layer between the charge retention layer and the protective layer, the charge ...


7
Shinji Nousho, Mitsuru Seto, Junichiro Hashimoto, Takashi Rokutanzono: Electrophotographic photoconductor with overlayer of polyol-curing polyurethane resin. RICOH Company, Oblon Spivak McClelland Maier & Neustadt, August 30, 1994: US05342718 (16 worldwide citation)

An electrophotographic photoconductor is composed of an electroconductive support, a photoconductive layer formed on the electroconductive support, and a protective layer formed on the photoconductive layer which is composed of a polyol curing-type urethane resin, and satisfies the condition of b/a. ...


8
Naohiro Toda, Takashi Rokutanzono, Shinji Nousyo, Tatsuya Niimi: Server computer, information terminal, printing system, remote printing method, recording medium, and computer data signal embeded in a carrier wave. Ricoh Company, Morrison & Foerster, August 5, 2008: US07408659 (4 worldwide citation)

A server computer searches for at least one printing-service providing store based on printing-condition information sent form an information terminal, and sends information representing the searched printing-service providing store to the information terminal. After a user selects one printer devic ...


9
Takashi Rokutanzono: Electrophotographic image forming process and electrophotographic photoconductor. Ricoh Company, Cooper & Dunham, October 9, 2001: US06300029 (3 worldwide citation)

An electrophotographic image forming process includes the steps of charging, light exposure, reversal development, and image transfer, using a photoconductor having an electroconductive support, and a photo-conductive layer formed thereon, with a residual solvent being contained in the photoconducto ...


10
Takashi Rokutanzono, Tamotsu Aruga, Tatsuya Niimi, Yoshiaki Kawasaki: Electrophotographic photoreceptor, electrophotographic image forming method and apparatus using the photoreceptor. Ricoh Company, OBLON SPIVAK McCLELLAND MAIER & NEUSTADT PC, August 23, 2001: US20010016296-A1

A photoreceptor including an electroconductive substrate and a photosensitive layer which is formed on the electroconductive substrate and which includes a charge generation material, wherein the charge generation material comprises an organic pigment and wherein the photosensitive layer further inc ...