Substituted Patents (Class 430/72)
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Publication number: 20030235771Abstract: A single layered electrophotographic photoreceptor includes a photosensitive layer having at least a charge generating material, a hole transporting material, an electron transporting material, and a binder on a conductive support. The photosensitive layer includes a peculiar charge transfer complex (CT-complex) formed by the hole transporting material and the electron transporting material.Type: ApplicationFiled: June 4, 2003Publication date: December 25, 2003Applicant: SAMSUNG Electronics Co., Ltd.Inventors: Saburo Yokota, Hwan-Koo Lee, Kyung-Yol Yon, Beom-Jun Kim, Nam-Jeong Lee
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Publication number: 20030232263Abstract: The present invention relates to an electrophotographic photosensitive member having a support and provided thereon a photosensitive layer. The photosensitive layer contains a high-molecular weight charge-transporting material having a specific repeating structural unit. The high-molecular weight charge-transporting material has a weight-average molecular weight Mw of 1,500 or more and an energy level of highest occupied molecular orbital, EHOMO, of from −8.3 eV or more to −8.0 eV or less as found by semiempirical molecular-orbital calculation. The present invention also relates to a process cartridge and an electrophotographic apparatus which have such an electrophotographic photosensitive member.Type: ApplicationFiled: April 25, 2003Publication date: December 18, 2003Inventors: Harunobu Ogaki, Akira Yoshida, Takakazu Tanaka, Itaru Takaya, Yuka Ishiduka
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Publication number: 20030232264Abstract: Improved organophotoreceptors comprise:Type: ApplicationFiled: May 7, 2003Publication date: December 18, 2003Inventors: Zbigniew Tokarski, Nusrallah Jubran, Vytautas Getautis, Edmundas Montrimas, Maryte Daskeviciene, Valentas Gaidelis, Vygintas Jankauskas
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Publication number: 20030211413Abstract: A photoconductive imaging member comprised of a supporting substrate, and thereover a single layer comprised of a mixture of a photogenerator component, a charge transport component, an electron transport component, and a polymer binder, and wherein the photogenerating component is a pigment.Type: ApplicationFiled: May 10, 2002Publication date: November 13, 2003Applicant: Xerox Corporation.Inventors: Liang-Bin Lin, Andronique Ioannidis, Ah-Mee Hor, Harold F. Hammond, Anderw R. Melnyk, James M. Markovics, James M. Duff, Timothy P. Bender, Richard H. Nealey, Cindy C. Chen, Linda L. Ferrarese, Kenny-Tuan T. Dinh
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Publication number: 20030203297Abstract: This invention relates to a novel organophotoreceptor that includes:Type: ApplicationFiled: March 6, 2003Publication date: October 30, 2003Inventors: Kam W. Law, Nusrallah Jubran, Zbigniew Tokarski
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Publication number: 20030203298Abstract: An electrophotographic photoreceptor having a photosensitive layer containing, as a charge transporting material, at least one indane compound of the formula (1), 1Type: ApplicationFiled: September 26, 2002Publication date: October 30, 2003Applicant: Hodogaya Chemical Co., Ltd.Inventors: Katsumi Abe, Chieko Inayoshi, Masaki Ohkubo, Mitsutoshi Anzai, Yasuo Murakami
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Publication number: 20030198880Abstract: This invention relates to a novel organophotoreceptor that includes:Type: ApplicationFiled: January 22, 2003Publication date: October 23, 2003Applicant: SAMSUNG Electronics Co. Ltd.Inventors: Kam W. Law, Nusrallah Jubran, Zbigniew Tokarski, Alan R. Katritzky, Ritu Jain, Rexiat Maimait
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Patent number: 6608228Abstract: Disclosed are highly efficient multiphoton absorbing compounds and methods of their use. The compounds generally include a bridge of pi-conjugated bonds connecting electron donating groups or electron accepting groups. The bridge may be substituted with a variety of substituents as well. Solubility, lipophilicity, absorption maxima and other characteristics of the compounds may be tailored by changing the electron donating groups or electron accepting groups, the substituents attached to or the length of the pi-conjugated bridge. Numerous photophysical and photochemical methods are enabled by converting these compounds to electronically excited states upon simultaneous absorption of at least two photons of radiation. The compounds have large two-photon or higher-order absorptivities such that upon absorption, one or more Lewis acidic species, Lewis basic species, radical species or ionic species are formed.Type: GrantFiled: April 15, 1999Date of Patent: August 19, 2003Assignee: California Institute of TechnologyInventors: Brian Cumpston, Matthew Lipson, Seth R. Marder, Joseph W. Perry
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Publication number: 20030138712Abstract: An organophotoreceptor that includes:Type: ApplicationFiled: November 6, 2002Publication date: July 24, 2003Applicant: SAMSUNG Electronics Co. Ltd.Inventors: Kam W. Law, Nusrallah Jubran, Zbigniew Tokarski, Alan R. Katrizky, Ritu Jain, Anatoliy Vakulenko
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Publication number: 20030104294Abstract: An organophotoreceptor that includes:Type: ApplicationFiled: September 13, 2002Publication date: June 5, 2003Applicant: SAMSUNG Electronics Co. Ltd.Inventors: Kam W. Law, Nusrallah Jubran, Zbigniew Tokarski, Alan R. Katritzky, Ritu Jain, Rexiat Maimait, Anatoliy V. Vakulenko
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Patent number: 6500592Abstract: Disclosed is an electrophotosensitive material comprising a conductive substrate and a photosensitive layer formed on the substrate, the photosensitive layer containing a quinone derivative of the formula (1) and/or (2): (R1, R2, R6 and R7 are alkyl; R3 and R8 are alkyl, alkoxy, aryl, aralkyl, hydrogen or atom; R4 and R5 are alkyl, alkoxy, aryl, aralkyl, hydrogen or halogen, or form a ring by binding each other; X is halogen; m is 1 to 4, n and p are 1 to 4.) The photosensitive material has high sensitivity.Type: GrantFiled: November 8, 2001Date of Patent: December 31, 2002Assignee: Kyocera Mita CorporationInventor: Fumio Sugai
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Patent number: 6485873Abstract: A biphenyl derivative is included in a photosensitive layer of an electrophotographic photoconductor. The electrophotographic photoconductor includes a single-layer photosensitive layer coated on a conductive substrate. The photosensitive layer includes a resin binder, a charge generation substance, a hole transport substance, and an electron transport substance. An electrophotographic apparatus using such an electrophotographic photoconductor has excellent electrical characteristics in a positive chargine system and is stable in repeated use.Type: GrantFiled: April 27, 2000Date of Patent: November 26, 2002Assignee: Fuji Electric Imaging Device Co., Ltd.Inventors: Kenichi Ohkura, Seizou Kitagawa, Masaru Takeuchi
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Patent number: 6465143Abstract: An electrophotographic photosensitive member capable of forming images with less defects, such as ghost, while retaining a high photo-sensitivity, is provided. The photosensitive member includes a support and a photosensitive layer disposed on the support, wherein said photosensitive layer contains a phthalocyanine pigment and an azo calix[n]arene compound represented by the formula (1) below: wherein n denotes an integer of 4-8; a number (n) of R1 independently denote a hydrogen atom or an alkyl group capable of having a substituent and including at least one alkyl group capable of having a substituent; a number (2n) of R2 independently denote a hydrogen atom or an alkyl group capable of having a substituent; and a number (n) of Ar independently denote a monovalent group selected from an aromatic hydrocarbon ring group capable of having a substituent, a heterocyclic ring group capable of having a substituent, and a combination of these groups capable of having a substituent.Type: GrantFiled: January 24, 2001Date of Patent: October 15, 2002Assignee: Canon Kabushiki KaishaInventors: Masato Tanaka, Hideki Anayama, Hidetoshi Hirano, Kan Tanabe, Kazue Asakura, Atsushi Fujii
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Publication number: 20020119385Abstract: Disclosed is a single-layer type electrophotosensitive material comprising a conductive substrate and a photosensitive layer made of a binder resin containing at least an electric charge generating material and an electric charge transferring material, which is formed on the conductive substrate, wherein an oxygen transmission rate of the binder resin is not more than 35 cc·mm/m2·day·atom, wherein it is preferred that a mobility at an electric field strength of 5×105 V/cm of the hole transferring material is not less than 5×10−6 cm2/V/sec and a solid content of the electric charge transferring material is not less than 30% by weight and not more than 50% by weight based on the whole solid content; said electrophotosensitive material has good ozone resistance and does not cause defects such as image black belt due to lowering of the charge capability, an ozone of which is 5.0 ppm at most, and is also superior in sensitivity and wear resistance.Type: ApplicationFiled: December 12, 2001Publication date: August 29, 2002Inventors: Jun Azuma, Yukimasa Watanabe, Hisakazu Honma, Ayako Yashima, Maki Uchida, Eiichi Miyamoto
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Publication number: 20020102484Abstract: The invention relates to an electrophotosensitive material comprising an organic photosensitive layer and an inorganic surface protective layer, wherein at least an outermost part of the organic photosensitive layer contains any one of the compounds represented by formulas (1) to (4).Type: ApplicationFiled: September 18, 2001Publication date: August 1, 2002Inventors: Eiichi Miyamoto, Yoshio Inagaki, Hideaki Fukunaga
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Patent number: 6395439Abstract: The present invention relates to a naphthoquinone derivative of the formula (1): wherein R1 and R2 are the same or different and each represents a hydrogen atom or an alkyl group having 1 to 6 alkyl group, and the electrophotosensitive material comprises a conductive substrate and a photosensitive layer provided on the conductive substrate, wherein the photosensitive layer contains the naphthoquinone derivative (1).Type: GrantFiled: June 15, 2000Date of Patent: May 28, 2002Assignee: Kyocera Mita CorporationInventors: Fumio Sugai, Nobuko Akiba
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Patent number: 6383698Abstract: The present invention relates to an electrophotosensitive material comprising a conductive substrate and a photosensitive layer formed on the substrate, the photosensitive layer containing a quinone derivative represented by the general formula (1), (2) or (3): wherein A represents an oxygen atom or a sulfur atom; R1 to R14 are the same or different and each represents an alkyl group or an aryl group; and m and n represent an integer of 0 to 4. The electrophotosensitive material has high sensitivity.Type: GrantFiled: November 13, 2000Date of Patent: May 7, 2002Assignee: Kyocera Mita CorporationInventors: Hideki Okada, Masaaki Yokoyama
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Patent number: 6346355Abstract: The present invention relates to an electrophotosensitive material comprising a conductive substrate and a photosensitive layer formed on the substrate, the photosensitive layer containing a quinone derivative represented by the general formula (1): wherein R represents hydrogen atom or alkyl; Me represents methyl. The electrophotosensitive material has high sensitivity, since quinone derivative (1) has excellent electron acceptability, comparability with binder resin and matching with electric charge generating material.Type: GrantFiled: March 15, 2001Date of Patent: February 12, 2002Assignee: Kyocera Mita CorporationInventors: Fumio Sugai, Yoshio Inagaki
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Publication number: 20010038961Abstract: The present invention relates to an electrophotosensitive material comprising a conductive substrate and a photosensitive layer formed on the substrate, the photosensitive layer containing a quinone derivative represented by the general formula (1): 1Type: ApplicationFiled: March 15, 2001Publication date: November 8, 2001Inventors: Fumio Sugai, Yoshio Inagaki
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Patent number: 6228547Abstract: Disclosed are novel compounds useful in electrophotographic photoreceptors as charge-transporting materials having good miscibility with binder polymers and capable of forming a thin stable organic film having a high concentration; and an electrophotographic photoreceptor containing the same. The compounds are bis(3,4-methylenedioxyphenylamino) derivatives represented by general formula (1): wherein Ar1 and Ar2 each is an optionally substituted aryl group and Ar3 is a phenylene group or an optionally substituted biphenylene group.Type: GrantFiled: June 15, 1999Date of Patent: May 8, 2001Assignee: Takasago International CorporationInventors: Tohru Kobayashi, Yoshimasa Matsushima, Yoko Aoki, Mamoru Yamada, Hiroshi Sugiyama, Toshimitsu Hagiwara
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Patent number: 6187493Abstract: The present invention provides an electrophotosensitive material comprising a conductive substrate and a photosensitive layer provided on the conductive substrate, the photosensitive layer comprising a specific hole transferring material and/or electron transferring material and a binding resin of a polyester resin which is a substantially linear polymer obtained by using a specific dihydroxy compound represented by the general formula (1): wherein R1 is an alkylene group having 2 to 4 carbon atoms; and R2, R3, R4 and R5 are the same or different and indicate a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, an aryl group or an aralkyl group or the like. This photosensitive material is improved in sensitivity, and is also superior in adhesion to conductive substrate as well as mechanical strength such as wear resistance, etc.Type: GrantFiled: February 10, 1998Date of Patent: February 13, 2001Assignee: Kyocera Mita CorporationInventors: Masato Katsukawa, Akiyoshi Urano, Ayako Sugase, Mitsuo Ihara, Ichiro Yamazato, Yuka Nakamura
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Patent number: 6183922Abstract: An electrophotographic photosensitive member is disclosed which is comprised of a support and a photosensitive layer provided thereon and is exposed to semiconductor laser light having a wavelength of from 380 nm to 500 nm. The photosensitive layer contains an azo pigment represented by the general formula: Ar—(—N═N—Cp)n.Type: GrantFiled: July 30, 1999Date of Patent: February 6, 2001Assignee: Canon Kabushiki KaishaInventors: Hideyuki Takai, Masato Tanaka, Kan Tanabe
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Patent number: 6139997Abstract: An electrophotographic photosensitive member is formed of a support, and a photosensitive layer disposed on the support. The photosensitive layer is characterized by containing an azo pigment having an organic group represented by formula (1) below: ##STR1## wherein X.sub.1, Z.sub.1, k.sub.1, B, A, R.sub.1 and R.sub.2 are defined in the text. The group of the formula (1) may provide at least one of up to 4 azo-substituents of the azo pigment having an entire structure represented byAr.paren open-st.N.dbd.N--Cp) 1-4,wherein Ar denotes an aromatic or heterocyclic core unit, Cp denotes a coupler residue group, and --(N.dbd.N--Cp) denotes such an azo-substituent. The photosensitive member can exhibit good electro-photographic performances including high and stable sensitivity on repetitive use.Type: GrantFiled: March 8, 1999Date of Patent: October 31, 2000Assignee: Canon Kabushiki KaishaInventors: Masato Tanaka, Kouichi Nakata
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Patent number: 6063534Abstract: A nitro group-containing naphthoquinone derivative represented by the following general formula: ##STR1## wherein R is a monovalent hydrocarbon group having a nitro group, and a ring A may be substituted with a substituent.This compound is a novel substance and is useful as an electron-transporting agent for an electrophotosensitive material. The electrophotosensitive material using the electron-transporting agent is highly sensitive, exhibits favorable repetitive properties, and makes it possible to favorably form images for extended periods of time.Type: GrantFiled: October 27, 1999Date of Patent: May 16, 2000Assignee: Mita Industrial Co., Ltd.Inventor: Kazunari Hamasaki
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Patent number: 6040097Abstract: Disclosed is a photoconductive solution which has excellent charge characteristics with easy control of charge amount and is completely volatilized after baking. The solution contains 2 to 5% by weight of tetraphenyl ethylene as ultraviolet-sensitive material. 0.1 to 1 wt. % diphenylpicrylhydrazine or 0.1 wt. % or less of tetracyanoquino-dimethane(TCNQ) as ultraviolet-sensitive donor material is desirably added to the tetraphenyl ethylene of 2 to 5 wt. % for better accomplishment of the purpose, and the solution contains at least one of trinitrofluorenone, ethylanthraquinone and their mixture of 0.1 to 1 wt. % as an acceptor. The solution is formed by mixing the above ingredients together with 10 to 20 wt. % of polystyrene-oxazoline copolymer(PS-OX) as polymer binder, and 20 to 85 wt. % of toluene as solvent.Type: GrantFiled: July 30, 1998Date of Patent: March 21, 2000Assignee: Orion Electric Co., Ltd.Inventors: Sang Youl Yoon, Ho Seok Shon
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Patent number: 6040100Abstract: An electrophotographic photosensitive member is formed of a support, and a photosensitive layer disposed on the support. The photosensitive layer is characterized by containing an azo pigment having an organic group represented by formula (1) below: wherein A denotes a residue group of formula (1A) below: ##STR1## and k.sub.1, k.sub.2, Z.sub.1, Z.sub.2, D; R.sub.1 and R.sub.2 are defined in the text. The group of the formula (1) may provide at least one of up to 4 azo-substituents of the azo pigment having an entire structure represented by ##STR2## wherein Ar denotes an aromatic or heterocyclic core unit, Cp denotes a coupler residue group, and --(N.dbd.N--Cp) denotes such an azo-substituent. The photosensitive member can exhibit good electrophotographic performances including high and stable sensitivity on repetitive use.Type: GrantFiled: March 3, 1999Date of Patent: March 21, 2000Assignee: Canon Kabushiki KaishaInventors: Masato Tanaka, Hideyuki Takai, Kouichi Nakata
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Patent number: 6022998Abstract: The present invention provides a novel stilbene derivative represented by the general formula (1): ##STR1## wherein R.sup.1 and R.sup.3 represent an alkyl group, an aryl group, an aralkyl group or an alkoxy group which are optionally substituted; and R.sup.2 and R.sup.4 represent a hydrogen atom, an alkyl group or an alkoxy group which are optionally substituted, provided that when the substitution position of R.sup.2 and R.sup.4 is the 4-(para) position, R.sup.2 and R.sup.4 are hydrogen atoms, a method for producing the same and use thereof. The above stilbene derivative (1) is useful as an electric charge transferring material, particularly hole transferring material.Type: GrantFiled: July 20, 1998Date of Patent: February 8, 2000Assignee: Mita Industrial Co., Ltd.Inventors: Hirofumi Kawaguchi, Yukimasa Watanabe, Yoshio Inagaki
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Patent number: 5965715Abstract: The invention provides novel bisazo compounds which is obtained by coupling two molecules of a 2-hydroxynaphthalene-3,6-dicarboxylic acid derivative and a compound having two diazo groups in its molecule, as well as a process for producing the same. The present compounds are superior in resistance to water, chemical agents, solvents, heat and the like.Type: GrantFiled: June 22, 1998Date of Patent: October 12, 1999Assignee: Kabushiki Kaisha Ueno Seiyaku Oyo KenkyujoInventors: Ryuzo Ueno, Masaya Kitayama, Kenji Minami, Hiroyuki Wakamori
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Patent number: 5876891Abstract: An alternating copolymer comprising a repeating unit of the formula:--Z--(X--Y).sub.n-- (I)wherein n is at least 2, X is O, S, Se or Te, and Y and Z are independently an aromatic or substituted aromatic group, and at least one other repeating unit, which is useful as a photosensitive material used in a spatial light modulator.Type: GrantFiled: May 26, 1995Date of Patent: March 2, 1999Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Akio Takimoto, Hirofumi Wakemoto, Eiichiro Tanaka, Masanori Watanabe, Junko Asayama, Hisahito Ogawa, Shigehiro Sato, Fumiko Yokotani
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Patent number: 5863683Abstract: An electrophotographic photoconductor composed of an electroconductive support and a photoconductive layer formed thereon, which contains as a charge generating material an azo pigment subjected to a salt milling process.Type: GrantFiled: September 30, 1996Date of Patent: January 26, 1999Assignee: Ricoh Company, Ltd.Inventors: Katsuichi Ohta, Masaomi Sasaki, Tamotsu Aruga
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Patent number: 5863688Abstract: The present invention provides a naphthoquinone derivative represented by the general formula (I): ##STR1## wherein R.sup.1 and R.sup.2 are as defined in the specification. An electrophotosensitive material containing this naphthoquinone derivative as an electron transferring material has high sensitivity.Type: GrantFiled: September 6, 1996Date of Patent: January 26, 1999Assignee: Mita Industrial Co., LtdInventors: Yukimasa Watanabe, Sakae Saito, Hirofumi Kawaguchi, Akiyoshi Urano, Fumio Sugai, Atsushi Fujii, Yasufumi Mizuta, Toshiyuki Fukami, Ichiro Yamazato, Yuji Tanaka, Eiichi Miyamoto, Hideo Nakamori, Mitsuo Ihara
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Patent number: 5830615Abstract: The present invention provides a novel naphthylenediamine derivative which is superior in electric charge transferring capability, compatibility with binding resin and stability, and an electrophotosensitive material which has a higher sensitivity and an excellent durability. The above naphthylenediamine derivative is represented by the following general formula (1), and the electrophotosensitive material is formed by providing a photosensitive layer having this naphthylenediamine derivative as an electric charge transferring material on a conductive substrate. ##STR1## wherein R.sup.1 to R.sup.4, R.sup.5a to R.sup.5f and a to d are as defined.Type: GrantFiled: May 29, 1997Date of Patent: November 3, 1998Assignee: Mita Industrial Co., Ltd.Inventors: Eiichi Miyamoto, Mikio Kakui, Hideo Nakamori, Yukikatsu Imanaka, Tadashi Sakuma, Maki Uchida, Hiroaki Iwasaki, Yasuyuki Hanatani, Nariaki Tanaka, Yuka Nakamura
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Patent number: 5814237Abstract: A method for forming a deflection grating is disclosed, includes the steps of: sequentially forming a dielectric layer and photoresist layer on a compound semiconductor substrate, and patterning the photoresist layer through optical holography to expose the dielectric layer; removing a portion of the dielectric layer on which the patterned photoresist layer is not formed, through RIE using the patterned photoresist layer as a mask; anisotropically etching a portion of the semiconductor substrate on which the dielectric layer is not formed, through RIE using the dielectric layer as a mask, to form a deflection grating; and removing the dielectric layer.Type: GrantFiled: September 26, 1996Date of Patent: September 29, 1998Assignees: Electronics and Telecommunications Research Institute, Korea Telecommunication AuthorityInventor: Chong-Dae Park
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Patent number: 5798197Abstract: The use of low molecular-weight or polymeric organic compounds which are present in the columnar-helical phase and have liquid-crystalline properties, as photoconductors or in electronic components, corresponding photoconductive layers, an electrophotographic recording material and a method for enhancing the photoconductivity.Type: GrantFiled: February 20, 1997Date of Patent: August 25, 1998Assignee: BASF AktiengesellschaftInventors: Wolfgang Paulus, Lukas Haussling, Karl Siemensmeyer, Karl-Heinz Etzbach, Dieter Adam, Juergen Simmerer, Helmut Ringsdorf, Peter Schuhmacher, Dietrich Haarer, Sundeep Kumar
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Patent number: 5753394Abstract: The present invention provides a trinitrofluorenonimine derivative represented by the general formula (I): ##STR1## wherein R.sup.1, R.sup.2 and R.sup.3 are the same or different and indicate an alkyl group which may have a substituent.Such a derivative is superior in electron transferring capability. Accordingly, the electrophotosensitive material having the photosensitive layer containing this derivative is superior in sensitivity.Type: GrantFiled: November 27, 1995Date of Patent: May 19, 1998Assignee: Mita Industrial Co., Ltd.Inventors: Hirofumi Kawaguchi, Syunichi Matsumoto
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Patent number: 5731078Abstract: A coated donor roll comprises a core with a coating, the coating comprising a charge transporting polymer, an organic acid metal salt compound, and iodine.Type: GrantFiled: May 30, 1995Date of Patent: March 24, 1998Assignee: Xerox CorporationInventors: Bing R. Hsieh, Joan R. Ewing, Damodar M. Pai, Kathyrn A. Wallace, Jerry H. Taylor, Francois Soos, Joseph R. Weber
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Patent number: 5721082Abstract: There are provided an electrophotographic photoreceptor having a photosensitive layer containing at least one amine compound represented by formula (1): ##STR1## wherein Ar.sub.1 represents a substituted or unsubstituted aryl group; Ar.sub.2 represents a substituted or unsubstituted phenylene group, a substituted or unsubstituted naphthylene group, a substituted or unsubstituted biphenylene group or a substituted or unsubstituted anthrylene group; R.sub.1 represents a hydrogen atom, a lower alkyl group or a lower alkoxy group; X represents a hydrogen atom, a substituted or unsubstituted alkyl group, or a substituted or unsubstituted aryl group; and Y represents a substituted or unsubstituted aryl group, or a group represented by formula (2) or (3) described in the specification.Type: GrantFiled: April 27, 1995Date of Patent: February 24, 1998Assignee: Hodogaya Chemical Co., Ltd.Inventors: Atsushi Takesue, Mitsutoshi Anzai, Takanobu Watanabe, Chieko Inayoshi
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Patent number: 5707768Abstract: A diamine compound of the following formula (1): ##STR1## wherein R.sub.1 is a hydrogen atom, a lower alkyl group or a lower alkoxy group, each of A.sub.1, A.sub.2 and A.sub.3 which are independent of one another, is a substituted or unsubstituted alkyl group, a substituted or unsubstituted aryl group, or a group of the following formula (2): ##STR2## wherein R.sub.1 is as defined above, and X is a substituted or unsubstituted arylene group or a substituted or unsubstituted heterocyclic bivalent group.Type: GrantFiled: November 28, 1995Date of Patent: January 13, 1998Assignee: Hodogaya Chemical Co., Ltd.Inventors: Mitsutoshi Anzai, Atsushi Takesue, Takanobu Watanabe, Chieko Inayoshi
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Patent number: 5707747Abstract: The present invention provides novel amine compounds useful as electron-transporting materials to be incorporated in organic electro-luminescence devices. More particularly, the present invention provides an organic electro-luminescence device (organic EL device) which can find wide application in various display units, requires a low applied voltage and exhibits a high luminance and an excellent stability.Type: GrantFiled: October 25, 1996Date of Patent: January 13, 1998Assignees: Hodogaya Chemical Co., Ltd., Matsushita Electric Industrial Co., Ltd.Inventors: Hiromitsu Tomiyama, Masahiko Oshino, Ikuko Ihara, Naoko Nakanishi, Mutsumi Suzuki, Masao Fukuyama, Mutsuaki Murakami, Taro Nambu
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Patent number: 5705694Abstract: The present invention provides a novel trinitrofluorenonimine derivative represented by the general formula (1): ##STR1## wherein R.sup.0 is an alkyl group; and R.sup.1, R.sup.2, R.sup.3, R.sup.4 and R.sup.5 are the same or different and indicate a hydrogen atom, an alkyl, an alkoxy, an aryl, an aralkyl, a halogen atom or an alkyl halide. This derivative is superior in electron transferring capability and compatibility with binding resin. Accordingly, an electrophotosensitive material comprising this derivative as an electron transferring material is superior in sensitivity.Type: GrantFiled: November 17, 1995Date of Patent: January 6, 1998Assignee: Mita Industrial Co., Ltd.Inventors: Hirofumi Kawaguchi, Yasufumi Mizuta, Syunichi Matsumoto, Nobuko Akiba, Toshiyuki Fukami, Ichiro Yamazato, Hisakazu Uegaito, Yuji Tanaka
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Patent number: 5700614Abstract: Cyclopentadiene derivative compounds, and an electrophotographic photoconductor comprising one cyclopentadiene derivative compound are disclosed. The cyclopentadiene derivative compounds are useful for use in a photoconductive layer, and readily soluble in a binder resin. The electrophotographic photoconductor can be prepared by using a simple, effective production method. The electrophotographic photoconductor comprising one cyclopentadiene derivative compound provides a good light sensitivity and high durability.Type: GrantFiled: March 2, 1995Date of Patent: December 23, 1997Assignee: Ricoh Company, Ltd.Inventors: Megumi Kawahara, Ikuko Yamada, Masayuki Shoshi, Akio Kojima
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Patent number: 5683842Abstract: Photoconductive imaging members comprised of unsymmetrical dimeric perylene as a charge generator, wherein said perylene is of the following formula ##STR1## wherein R is hydrogen, alkyl, cycloalkyl, substituted alkyl, aryl, substituted aryl, aralkyl or substituted aralkyl group, and X-Y is an unsymmetrical bridging moiety of alkylene, substituted alkylene, arylene, substituted arylene, aralkylene or substituted aralkylene.Type: GrantFiled: February 26, 1997Date of Patent: November 4, 1997Assignee: Xerox CorporationInventors: James M. Duff, C. Geoffrey Allen, Ah-Mee Hor, Gordon K. Hamer
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Patent number: 5622799Abstract: An electrophotographic photosensitive member, a process cartridge having the electrophotographic photosensitive member and an electrophotographic apparatus are provided. The electrophotographic photosensitive member has a conductive substrate and a photosensitive layer thereon, wherein the photosensitive layer contains a disazo pigment represented by the following formula (1): ##STR1## wherein R.sub.1 to R.sub.8 are the same or different and are each a hydrogen atom, a halogen atom, an alkyl group or an alkoxy group, n is a positive integer, A.sub.1 and A.sub.2 are the same or different and are each a coupler residual group having a phenolic hydroxyl group, and at least one of A.sub.1 and A.sub.2 is a coupler residual group represented by the following formula (2): ##STR2## wherein X.sub.1 is a residual group forming a polycyclic aromatic ring or a heterocyclic ring by condensing with a benzene ring, R.sub.9 and R.sub.Type: GrantFiled: November 21, 1994Date of Patent: April 22, 1997Assignee: Canon Kabushiki KaishaInventors: Koichi Suzuki, Hideyuki Takai, Satomi Sugiyama, Mitsuhiro Kunieda
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Patent number: 5587263Abstract: A triarylamine compound useful as a charge transport material of an electrophotographic photoreceptor, which represented by formula (I) ##STR1## wherein Ar.sub.1 and Ar.sub.2 each represents a phenyl group or a condensed ring group.Type: GrantFiled: May 18, 1995Date of Patent: December 24, 1996Assignee: Fuji Xerox Co., Ltd.Inventors: Katsumi Nukada, Akira Imai, Ryosaku Igarashi
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Patent number: 5576132Abstract: An electrophotographic photoconductor comprises an electroconductive substrate and a photoconductive layer formed thereon comprising as an effective component at least one pyrenylamine derivative of formula (I): ##STR1## wherein R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.5, W, j, k, l, m and n are specifically defined in the specification. Furthermore, a novel pyrenylamine derivative for use in the above electrophotographic photoconductor, an aldehyde compound, which is an intermediate for producing the pyrenylamine derivative, and methods of preparing the pyrenylamine derivative and the aldehyde compound are disclosed.Type: GrantFiled: April 24, 1995Date of Patent: November 19, 1996Assignee: Ricoh Company, Ltd.Inventors: Chiaki Tanaka, Masaomi Sasaki, Tamotsu Aruga, Tomoyuki Shimada, Hiroshi Adachi
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Patent number: 5569749Abstract: An organic photoconductive material is represented by the following general formula [1]:A.sub.1 --N.dbd.N--B--N.dbd.N--A.sub.2 [1],wherein B is a divalent organic group bonded to nitrogen atoms forming azo groups, A.sub.1 and A.sub.2 are groups different from each other, A.sub.1 is represented by the following general formula [A1]: ##STR1## wherein X is an atomic group which is necessary for forming an aromatic hydrocarbon ring or an aromatic hetero-ring by condensation with the benzene ring, Y is a hydrogen atom, an alkyl group, an alkoxy group or a halogen atom, m is an integer of 1 to 4, R is an aromatic hydrocarbon ring group or an aromatic hetero-ring group and n is 1 or 2, and A.sub.2 is a group represented by one of the following general formulae [A2] and [A3]: ##STR2## wherein a.sub.1 is a group selected from R, --N.dbd.CH--R and ##STR3## R, X, Y, m and n are the same as those in the general formula [A1] and p is 0 or 1.Type: GrantFiled: January 18, 1996Date of Patent: October 29, 1996Assignee: Dainichiseika Color & Chemicals Mfg. Co., Ltd.Inventors: Hisao Kouno, Shyouichi Takahashi, Kazuhiro Higashide, Nakaji Komiyama, Osamu Suda, Masaru Hasegawa
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Patent number: 5561017Abstract: A polyester polymer comprising repeating units (I), or repeating units (I) and (II), and having a reduced viscosity (.eta. sp/c) of 0.2 to 10.0 dl/g, measured at 20.degree. C. as a 0.5 g/dl solution dissolved in methylene chloride is prepared by allowing a dihydric phenol (III), or dihydric phenols (III) and (IV), to react with a carbonate precursor or a dibasic acid. An electrophotographic photoreceptor which comprises an electroconductive substrate and a photosensitive layer disposed on the electroconductive substrate and containing the polyester polymer as a charge transporting material or a binder resin. ##STR1## wherein, W is --O-- or single bond, X is a divalent group which is derived from a dihydric phenol containing a hydrazine structure, each of R.sup.25 and R.sup.26 is a halogen atom, an alkyl group, a cycloalkyl group or an aryl group, each of m and n is an integer of 0 to 4, Y is single bond, --O--, --S--, --SO--, --SO.sub.2 --, --CR.sup.27 R.sup.28 --, a 1,1-cycloalkylene group or an .alpha.,.Type: GrantFiled: December 6, 1995Date of Patent: October 1, 1996Assignee: Idemitsu Kosan Co., Ltd.Inventors: Tomohiro Nagao, Shuji Sakamoto, Hironobu Morishita, Hideyuki Miyamoto
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Patent number: 5558964Abstract: An to an electrophotographic photosensitive member includes a photosensitive layer containing a specified oxytitanium phthalocyanine and a polyvinyl acetal resin having a structural unit represented by Formula: ##STR1## wherein X is a hydrogen atom, a fluorine atom, a chlorine atom, a bromine atom, a nitro group, or a cyano group; and Y is a fluorine atom, a chlorine atom, a bromine atom, a nitro group, or a cyano group. The photosensitive member maintains a low residual potential without deterioration of the sensitivity during repeated use.Type: GrantFiled: December 12, 1994Date of Patent: September 24, 1996Assignee: Canon Kabushiki KaishaInventors: Toshiyuki Yoshihara, Nobuyuki Hanami, Hideyuki Takai, Hideki Anayama, Hajime Miyazaki, Junichi Kishi, Itaru Yamazaki, Harumi Sakoh, Tetsuro Kanemaru, Kazushi Iuchi, Hideyuki Ainoya
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Patent number: 5527653Abstract: An electrophotographic photosensitive member includes a conductive substrate and a photosensitive layer thereon. The photosensitive layer contains a disazo pigment having a 1,2-benzofluorenone as a central structure. A process cartridge and an electrophotographic apparatus containing the electrophotographic photosensitive member is also provided.Type: GrantFiled: September 29, 1994Date of Patent: June 18, 1996Assignee: Canon Kabushiki KaishaInventor: Masato Tanaka
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Patent number: 5484673Abstract: An electrophotographic photosensitive member of the present invention has a photosensitive lazer containing a compound represented by the formula (1): ##STR1## The electrophotographic photosensitive member has a high sensitivity and can maintain stable and excellent electrophotographic characteristics even when repeatedly used.Type: GrantFiled: February 23, 1995Date of Patent: January 16, 1996Assignee: Canon Kabushiki KaishaInventors: Toshihiro Kikuchi, Akio Maruyama, Noriko Ohtani, Shin Nagahara, Hisami Tanaka, Teigo Sakakibara, Takakazu Tanaka