11
Akihiro Kondoh: Electrophotographic photoconductors using bisazo compounds. Sharp Kabushiki Kaisha, Birch Stewart Kolasch & Birch, December 29, 1998: US05853930 (2 worldwide citation)

There is provided an electrophotographic photoconductor comprising as a charge carrier generating substance a bisazo compound of the general formula (I): ##STR1## wherein R.sup.1 and R.sup.2 are the same or different, each representing a hydrogen atom, a halogen atom, a lower alkyl group optionally ...


12
Takatsugu Obata, Akihiro Kondoh, Kazuya Ishida: Electrophotographic photoreceptor and image forming apparatus having the same. Sharp Kabushiki Kaisha, Nixon & Vanderhye P C, May 19, 2009: US07534539 (1 worldwide citation)

An object of the invention is to provide a highly reliable electrophotographic photoreceptor having high sensitivity, excellent in light responsivity, not suffering from lowering of such characteristics even when it is used under a low temperature circumstance or in a high speed electrophotographic ...


13
Kazuya Ishida, Akihiro Kondoh, Takatsugu Obata: Electrophotographic photoreceptor, electrophotographic image forming method, and electrophotographic apparatus. Sharp Kabushiki Kaisha, Nixon & Vanderhye P C, June 1, 2010: US07727693 (1 worldwide citation)

An object of the invention is to provide an electrophotographic photoreceptor showing high responsivity even under a low temperature and low humidity circumstance and capable of compatibilize the decrease of the size and the increase in the image forming speed of an electrophotographic apparatus. In ...


14
Akihiro Kondoh, Hiroshi Sugimura, Takatsugu Obata: Asymmetric bis-hydroxyenamine compound, electrophotographic photoreceptor and image forming apparatus. Sharp Kabushiki Kaisha, Nixon & Vanderhye P C, December 1, 2009: US07625681 (1 worldwide citation)

There is provided an organic photoconductive material that can realize an electrophotographic photoreceptor which is not only excellent in charge transporting ability but also excellent in solubility in a solvent and compatibility with a resin and moreover, which is excellent in both electric proper ...


15
Akihiro Kondoh, Takatsugu Obata: Amine compound, manufacturing method thereof, electrophotographic photoreceptor using amine compound and image forming apparatus having the same. Sharp Kabushiki Kaisha, Nixon & Vanderhye P C, July 21, 2009: US07563548 (1 worldwide citation)

An amine compound represented by the general formula (1), which is incorporated as a charge-transporting substance to a charge-transporting layer of an electrophotographic photoreceptor: (in which Ar1, Ar2 and Ar3 each represents an optionally-substituted aryl group, or an optionally-substituted mon ...


16
Takatsugu Obata, Akihiro Kondoh: Electrophotographic photoreceptor and image forming apparatus. Sharp Kabushiki Kaisha, Nixon & Vanderhye P C, June 26, 2012: US08206881 (1 worldwide citation)

There provides an electrophotographic photoreceptor using a novel amine compound which has an excellent effect of ozone resistance and can be used for providing an electrophotographic photoreceptor having no adverse effect on other characteristics, and an image forming apparatus including the photor ...


17
Masato Murakami, Naomichi Sakai, Hiroshi Takaichi, Akihiro Kondoh, Shoichi Kagiya, Naomichi Nakamura, Hiroyuki Fujimoto, Naoki Koshizuka, Shoji Tanaka: Process of producing oxide superconductor. Nippon Steel Corporation, Tosoh Corporation, Kawasaki Jukogyo Kabushiki Kaisha, Hokuriku Electric Power Company, Kawasaki Steel Corporation, Railway Technical Research Institute, International Superconductivity Technology Center, Wenderoth Lind & Ponack, February 14, 1995: US05389604 (1 worldwide citation)

To ensure a well-oriented crystal structure, there is provided a process of producing an oxide superconductor of a Y--Ba--Cu--O system with a composition having an atomic ratio Y:Ba:Cu of 1.0-2.0:2.0-2.5:3.0-3.5, the process comprising the steps of: preparing a semimelt including solid and liquid ph ...


18
Tatsuhiro Morita, Tomoko Kanazawa, Akihiro Kondoh, Yohichi Takesawa, Takatsugu Obata, Shinya Mimura, Hiroshi Sugimura: Electrophotographic photoreceptor and image forming apparatus including the same. Sharp Kabushiki Kaisha, Birch Stewart Kolasch & Birch, September 28, 2010: US07803507

An electrophotographic photoreceptor of high durability capable of providing stable excellent electrical characteristics over a prolonged period of time, which electrophotographic photoreceptor excels in mechanical strength. A photosensitive layer (14) of an electrophotographic photoreceptor (1) inc ...


19
Akihiro Kondoh, Hiroshi Sugimura, Takatsugu Obata: Electrophotoconductor and image forming apparatus. Sharp Kabushiki Kaisha, Nixon & Vanderhye P C, July 13, 2010: US07754403

An organic photoconductive material which is useful as a raw material compound for a variety of functional materials and makes it possible to implement an electrophotoconductor which is excellent in terms of the charge transporting performance, excellent in terms of dissolution in solvents and compa ...


20
Akiko Kihara, Akihiro Kondoh, Hiroshi Sugimura, Takatsugu Obata: Aromatic polycarbonate, electrophotographic photoreceptor, and image forming apparatus. Sharp Kabushiki Kaisha, Nixon & Vanderhye P C, July 26, 2011: US07985519

In an electrophotographic photoreceptor including a conductive substrate and a single layer type photosensitive layer, the aromatic polycarbonate is contained to a single layer type photosensitive layer, which aromatic polycarbonate includes a constituent unit represented by the following general fo ...