Containing Amino Or Substituted Amino Group Patents (Class 430/73)
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Patent number: 5486441Abstract: A 1,4-bis(4,4-diphenyl-1,3-butadienyl)benzene derivative represented by formula (I): ##STR1## wherein R.sup.1, R.sup.2, R.sup.3, and R.sup.4 each independently represents a lower alkyl group which may be substituted, an aralkyl group which may be substituted, or an aryl group which may be substituted, and an electrophotographic photoreceptor using the compound are disclosed. The photoreceptor provides a high carrier drift mobility.Type: GrantFiled: April 27, 1995Date of Patent: January 23, 1996Assignee: Takasago International CorporationInventors: Yoshimasa Matsushima, Toshimitsu Hagiwara
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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
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Patent number: 5462826Abstract: Charge transporting materials having general formula (I): ##STR1## wherein R.sup.1 represents hydrogen; an unsubstituted or substituted alkyl group; an alkoxyl group having 1 to 4 carbon atoms; a thioalkoxyl group having 1 to 4 carbon atoms; an aryloxy group; an aralkyl group; a nitro group; an unsubstituted or substituted aryl group; a halogen; an amino group; an unsubstituted or substituted dialkylamino group; R.sup.2 represents hydrogen; an unsubstituted or substituted alkyl group; an alkoxyl group having 1 to 4 carbon atoms; or a halogen; R.sup.3 represents hydrogen; an alkyl group having 1 to 4 carbon atoms; an alkoxyl group having 1 to 4 carbon atoms; a halogen; a dialkylamino group; an amino group; a thioalkoxyl group having 1 to 4 carbon atoms; an aryloxy group; a methylenedioxy group; an aralkyl group; or an unsubstituted or substituted aryl group; R.sup.Type: GrantFiled: February 17, 1994Date of Patent: October 31, 1995Assignee: Ricoh Company, Ltd.Inventors: Tomoyuki Shimada, Masaomi Sasaki, Mitsuru Hashimoto, Tamotsu Aruga
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Patent number: 5463128Abstract: A 1,4-bis(4,4-diphenyl-1,3-butadienyl)benzene derivative represented by formula (I): ##STR1## wherein R.sup.1, R.sup.2, R.sup.3, and R.sup.4 each independently represents a lower alkyl group which may be substituted, an aralkyl group which may be substituted, or an aryl group which may be substituted, and an electrophotographic photoreceptor using the compound are disclosed. The photoreceptor provides a high carrier drift mobility.Type: GrantFiled: April 28, 1994Date of Patent: October 31, 1995Assignee: Takasago International CorporationInventors: Yoshimasa Matsushima, Toshimitsu Hagiwara
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Patent number: 5453343Abstract: Organic photoreceptors of the functionally separated laminated type containing a hydrazone compound in the charge transport layer thereof which provides low crystallinity and improved sensitivity, durability, and reproducibility. The hydrazone compound disclosed in the present invention is presented by the following general formula (I): ##STR1## wherein R.sub.1 represents a substituted or unsubstituted C.sub.1 -C.sub.4 alkyl group, R.sub.2 represents a hydrogen atom, or an alkyl or alkoxy group; n is an integer of either 1 or 2; R.sub.3 and R.sub.4 each independently represents a substituted or unsubstituted alkyl group, a substituted or unsubstituted aryl group or a substituted or unsubstituted aralkyl group; or alternatively R.sub.3 and R.sub.4 form a substituted or unsubstituted aromatic heterocyclic ring residue cojointly with the nitrogen atom to which they are bonded.Type: GrantFiled: February 9, 1993Date of Patent: September 26, 1995Assignee: Industrial Technology Research InstituteInventors: Jia-Ming Liu, Shih-Ying Shen, Kuei-Fei Teng
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Patent number: 5445909Abstract: An electrophotographic photoreceptor high in sensitivity and contrast potential after light irradiation is disclosed. The photoreceptor comprises an electroconductive substrate having thereon a photoconductive layer comprising a charge generating layer comprising a charge generating material, and a charge transporting layer comprising a charge transporting material, wherein the ionization potential IPg of the charge generating material is lower than the ionization potential IPt of the charge transporting material, the difference therebetween is 0.35 eV or less, and the difference between the ionization potential IPg1 of the charge generating layer and the ionization potential IPt1 of the charge transporting layer is within the range of -0.1 to +0.1 eV.Type: GrantFiled: July 9, 1993Date of Patent: August 29, 1995Assignee: Fuji Xerox Co., Ltd.Inventors: Yutaka Akasaki, Katsuhiro Sato, Katsumi Nukada
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Patent number: 5436100Abstract: An electrophotographic photoconductor is composed of an electroconductive substrate and a photoconductive layer formed thereon including a m-phenylenediamine derivative of formula (I): ##STR1## wherein Ar represents a non-condensed polycyclic hydrocarbon group other than a phenyl group, or a condensed polycyclic hydrocarbon group having not more than 18 carbon atoms; and R.sup.1, R.sup.2, R.sup.3 and R.sup.4 each represent hydrogen a halogen atom a cyano group, a nitro group, an alkyl group, an alkoxyl group, an aryl group, an aryloxy group, an alkylmercapto group, a group represented by ##STR2## in which R.sup.6 and R.sup.7 each represent hydrogen, an alkyl group, or an aryl group, an alkylenedioxy group or an alkylenedithio group. Novel m-phenylenediamine derivatives for use in the electrophotoconductor and intermediates for producing the m-phenylenediamine derivatives, and methods of those derivatives are disclosed.Type: GrantFiled: April 7, 1994Date of Patent: July 25, 1995Assignee: Ricoh Company, Ltd.Inventors: Tomoyuki Shimada, Masaomi Sasaki, Tamotsu Aruga, Hiroshi Adachi
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Patent number: 5424157Abstract: An electrophotosensitive material containing, as a charge-generating agent, a compound represented by the following general formula (1), ##STR1## wherein Cp is an azo coupling component, Y is a divalent organic group containing at least one aromatic ring or heterocyclic ring, R1 and R8 are alkyl groups or halogen atoms, respectively, and R2 and R4 are alkyl groups, halogen atoms or hydrogen atoms, respectively. The charge-generating agent used here remains chemically stable and exhibits excellent recurring property and charge-forming efficiency.Type: GrantFiled: December 1, 1993Date of Patent: June 13, 1995Assignee: Mita Industrial Co., Ltd.Inventors: Eiichi Miyamoto, Yasufumi Mizuta
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Patent number: 5415962Abstract: An electrophotographic photosensitive member is constituted by disposing a photosensitive layer on an electroconductive support. The photosensitive layer is characterized by containing a specific fluorene compound or by containing another specific fluorene compound and a specific triphenylamine compound. The photosensitive layer is suitable for providing an electrophotographic apparatus showing excellent electrophotographic characteristics such as a high photosensitivity, a good potential stability in repetitive use, a decreased transfer memory, no crack in the photosensitive layer and no crystallization of a charge-transporting material.Type: GrantFiled: April 20, 1993Date of Patent: May 16, 1995Assignee: Canon Kabushiki KaishaInventors: Tetsuro Kanemaru, Toshihiro Kikuchi, Akihiro Senoo, Takakazu Tanaka
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Patent number: 5403687Abstract: A method of modifying a pigment which comprises dissolving the pigment into sulfuric acid and then mixing water with the pigment-sulfuric acid solution. The modified pigment is excellent in achieving uniform dispersion and has a small particle size. An electrophotographic photoreceptor containing the modified pigment as the organic photoconductor has uniform sensitivity, sufficient charge acceptance and small dark decay.Type: GrantFiled: June 4, 1993Date of Patent: April 4, 1995Assignee: Citizen Watch Co., Ltd.Inventors: Mizue Fujimori, Yorinobu Yamada
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Patent number: 5395715Abstract: The present invention relates to an improvement of a photosensitive member having a photosensitive layer which contains a specific amino compound as a charge transporting material.Type: GrantFiled: June 29, 1993Date of Patent: March 7, 1995Assignee: Minolta Camera Kabushiki KaishaInventors: Hideaki Ueda, Shigeaki Tokutake, Keiichi Inagaki, Yuki Shimada
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Patent number: 5389480Abstract: An electrophotographic photoreceptor comprising an electrically conductive substrate and a photosensitive layer formed thereon, wherein the photosensitive layer contains at least one member selected from the group consisting of compounds of the formula (I), (II), and (III) as defined in the specification.Type: GrantFiled: November 19, 1993Date of Patent: February 14, 1995Assignee: Mitsubishi Kasei CorporationInventors: Hitoshi Ono, Atsuo Saita
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Patent number: 5389478Abstract: An electrophotographic photosensitive member has an electroconductive support, and a photosensitive layer formed thereon. The photosensitive layer contains a compound represented by the formula (1).Type: GrantFiled: August 18, 1993Date of Patent: February 14, 1995Assignee: Canon Kabushiki KaishaInventors: Akira Yoshida, Koji Goto, Fumio Sumino
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Patent number: 5389481Abstract: An electrophotographic photoreceptor comprising an electrically conductive substrate and a photosensitive layer formed thereon, wherein said photosensitive layer contains an arylamine compound of the following formula (I): ##STR1## wherein X is a hydrogen atom or a group of the formula (II): ##STR2## Y is a group of the formula (III) or (IV):--O--A.sup.1 --O-- (III)--A.sup.2 --O--A.sup.3 -- (IV)wherein, the substituents are defined hereafter.Type: GrantFiled: April 11, 1994Date of Patent: February 14, 1995Assignee: Mitsubishi Kasei CorporationInventors: Atsuo Saita, Shuichi Maeda, Kohzo Ishio, Hitoshi Ono, Tetsuo Murayama
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Patent number: 5389479Abstract: The present invention provides a highly sensitive and highly durable electrophotographic photoconductor providing a conductive support and a photosensitive layer formed thereon, the photosensitive layer comprising a bis-enamine compound of the formula (I): ##STR1## wherein "A" is a C.sub.6-12 arylene group which may have a substituent, a bivalent heterocyclic reside which may have a substituent, a C.sub.2-4 lower alkylene group which may have a substituent; "B" is a lower dialkylamino group, a lower alkoxy group, a lower alkyl group, a hydrogen atom or a halogen atom; and k is an integer from 1 to 5 provided that when k is an integer of 2 or more, "B" may be identifcal or different, may together form a ring; and n is an integer from 2 to 4.Type: GrantFiled: August 24, 1993Date of Patent: February 14, 1995Assignee: Sharp Kabushiki KaishaInventors: Kiyofumi Morimoto, Akihiro Kondo, Satoshi Machino, Kazuhiro Emoto, Akiko Masuda
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Patent number: 5358813Abstract: Crystals of chlorogallium phthalocyanine, having distinct diffraction peaks at (i) 7.4.degree., 16.6.degree., 25.5.degree. and 28.3.degree., (ii) 6.8.degree., 17.3.degree., 23.6.degree. and 26.9.degree., or (iii) 8.7.degree. to 9.2.degree., 17.6.degree., 24.0.degree., 27.4.degree. and 28.8.degree. of the Bragg angle (2.theta..+-.0.2) to a CuK.alpha. characteristic X-ray; a photoconductive material for electrophotographic photoreceptor comprising the chlorogallium phthalocyanine; and an electrophotographic photoreceptor comprising an electroconductive support having thereon a light-sensitive layer containing at least one or more of chlorogallium phthalocyanine crystals. The electrophotographic photoreceptor has excellent sensitivity and durability.Type: GrantFiled: January 12, 1993Date of Patent: October 25, 1994Assignee: Fuji Xerox Co., Ltd.Inventors: Masakazu Iijima, Katsumi Nukada, Katsumi Daimon, Akira Imai, Toru Ishii, Yasuo Sakaguchi, Kiyokazu Mashimo, Ichiro Takegawa
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Patent number: 5356742Abstract: An electrophotographic photoconductor is composed of an electroconductive substrate and a photoconductive layer formed thereon, the photoconductive layer includes a dipyrenylamine derivative of formula (I): ##STR1## wherein R represents an alkyl group with 1 to 12 carbon atoms, which may have a substituent, or an aryl group which may have a substituent. Novel dipyrenylamine derivatives of formula (I), in which R is --ph--(R.sup.4)n, wherein, ph is a phenyl group, R.sup.4 is hydrogen, an unsubstituted or substituted alkyl group having 1 to 12 carbon atoms, an unsubstituted or substituted alkoxyl group having 1 to 12 carbon atoms, n is an integer of 1 to 5, and when n is 2 to 5, R.sup.4 may be the same or different, which are for use in the photoconductive layer of the electrophotographic photoconductor, are synthesized.Type: GrantFiled: February 28, 1992Date of Patent: October 18, 1994Assignee: Ricoh Company, Ltd.Inventors: Tomoyuki Shimada, Masaomi Sasaki, Tamotsu Aruga, Hiroshi Adachi
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Patent number: 5356746Abstract: An electrophotographic photosensitive member, comprising: an electroconductive support and a photosensitive layer disposed on the electroconductive support, wherein the photosensitive layer comprises a triazene compound represented by the following formula (1): ##STR1## wherein R denotes hydrogen, a substituted or unsubstituted alkyl group, a substituted or unsubstituted aryl group, or a substituted or unsubstituted aralkyl group.Type: GrantFiled: October 15, 1992Date of Patent: October 18, 1994Assignee: Canon Kabushiki KaishaInventors: Satomi Sugiyama, Yoshio Kashizaki, Koichi Suzuki, Shintetsu Go
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Patent number: 5344734Abstract: An electrophotographic recording material which comprises an electrically conductive support having thereon a photoconductive layer containing at least one aromatic amino compound having positive charge transport capacity, wherein said aromatic amino compound is within the scope of general formula (A) defined in the description.Type: GrantFiled: August 26, 1992Date of Patent: September 6, 1994Assignee: AGFA-Gevaert, N.V.Inventors: Marcel J. Monbaliu, David R. Terrell, Stefaan K. De Meutter
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Patent number: 5342719Abstract: An electrophotographic imaging member including a charge generating layer, a charge transport layer with charge transport molecules and as sensitizing additive or dopant a hydroxy derivative of the transport molecule.Type: GrantFiled: March 1, 1993Date of Patent: August 30, 1994Assignee: Xerox CorporationInventors: Damodar M. Pai, John F. Yanus, Paul J. DeFeo, Alan E. J. Toth, Walter Mychajlowskij, Zoran Popovic
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Patent number: 5338634Abstract: The present invention provides a new diamino compound represented by the following general formula [I] or [X] excellent in charge transporting properties. ##STR1## The present invention provides a photosensitive member and an electroluminescence device both of which comprise the diamino compound of the general formula [I] or [X] as a charge transporting material.Type: GrantFiled: July 30, 1992Date of Patent: August 16, 1994Assignee: Minolta Camera Kabushiki KaishaInventor: Hideaki Ueda
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Patent number: 5338633Abstract: An electrophotographic photoreceptor comprising an electrically conductive substrate and a photoconductive layer formed thereon, wherein said photoconductive layer contains a compound of the formula ( I ): ##STR1## wherein R.sup.1 to R.sup.18 are respectively and independently a hydrogen atom, a halogen atom, a saturated or unsaturated aliphatic hydrocarbon group, an aromatic hydrocarbon group, an alkoxy group, an aryloxy group, a dialkylamino group or a diarylamino group, wherein the aliphatic hydrocarbon group, the aromatic hydrocarbon group, the alkoxy group, the aryloxy group, the dialkylamino group and the diarylamino group may have substituents, X is a bivalent hydrocarbon group which may have substituents, each of A.sup.1 and A.sup.2 is a saturated or unsaturated aliphatic hydrocarbon group or an aromatic hydrocarbon group, or is bonded to R.sup.5 or R.sup.Type: GrantFiled: May 22, 1992Date of Patent: August 16, 1994Assignee: Mitsubishi Kasei CorporationInventors: Mamoru Nozomi, Sumiko Watabe, Ryoko Aso
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Patent number: 5336576Abstract: An azo compound represented by the following general formula IA and an electrophotographic photosensitive member comprising a photosensitive layer containing the azo compound: ##STR1## wherein R.sup.1 and R.sup.2 are the same or different from each other and indicate a hydrogen atom, an alkyl group, an alkenyl group, a hydroxyl group, an alkoxy group, a carboxy group, an alkoxy carbonyl group, an acyl group, an aryl group, a halogen group or a cyano group, respectively; R.sup.14 indicates a hydrogen atom, a halogen group, an alkyl group, an alkoxy group, an aryl group, an amine group, a cyano group, a nitro group or a sulfoxide group; and A indicates a coupler residue having an acceptor property.Type: GrantFiled: November 24, 1992Date of Patent: August 9, 1994Assignee: Mita Industrial Co., Ltd.Inventors: Eiichi Miyamoto, Yasuyuki Hanatani, Hiroaki Iwasaki, Yasufumi Mizuta, Akihiko Kawahara
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Patent number: 5330866Abstract: The present invention provides a new amino compound represented by the following general formula [I] excellent in charge transporting properties. ##STR1## The present invention provides a photosensitve member and an electroluminescence device both of which comprise the amino compound of the general formula [I] as a charge transporting material.Type: GrantFiled: February 14, 1992Date of Patent: July 19, 1994Assignee: Minolta Camera Kabushiki KaishaInventor: Hideaki Ueda
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Patent number: 5324605Abstract: An electrophotographic photoreceptor comprising an electrically conductive support and a photosensitive layer formed thereon, wherein said photosensitive layer contains an arylamine compound of the formula (I): ##STR1## wherein each of Ar.sup.1, Ar.sup.2, Ar.sup.3 and Ar.sup.4 which may be the same or different, is an aryl group which may have substituents, or a heterocyclic group which may have substituents, each of R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.5 and R.sup.6 which may be the same or different, is a hydrogen atom, a hydroxyl group, a halogen atom, an alkyl group which may have substituents, an alkoxy group which may have substituents, or a phenyl group which may have substituents, and each of R.sup.7 and R.sup.8 which may be the same or different, is a hydrogen atom, a halogen atom, an alkyl group which may have substituents, or an alkoxy group which may have substituents.Type: GrantFiled: July 27, 1992Date of Patent: June 28, 1994Assignee: Mitsubishi Kasei CorporationInventors: Hitoshi Ono, Atsuo Saita
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Patent number: 5314775Abstract: The present invention provides a new diamino compound represented by the following general formula [I]. ##STR1## The present invention provides also a photosensitive member and an electroluminescence device both of which comprise the diamino compound of the general formula [I] as a charge transporting material.Type: GrantFiled: August 10, 1992Date of Patent: May 24, 1994Assignee: Minolta Camera Kabushiki KaishaInventor: Hideaki Ueda
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Patent number: 5308726Abstract: An electrophotographic photosensitive element is here disclosed which comprises a conductive substrate and at least a photosensitive layer formed on the conductive substrate, the electrophotographic photosensitive element being characterized in that the photosensitive layer contains, as a charge transport material, a compound represented by the formula (1), (2) or (3) ##STR1##Type: GrantFiled: December 14, 1992Date of Patent: May 3, 1994Assignee: NEC CorporationInventors: Akira Hirano, Eriko Tsuruoka
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Patent number: 5306587Abstract: A photosensitive recording material which comprises an electrically conductive support having thereon a layer containing a charge transporting compound (n-CTM-compound) capable of accepting and transporting electrons obtained by radiation-activated charge-generation in a charge generating compound (CGM-compound) present in said material, wherein said n-CTM-compound corresponds to a general formula (A), (B), or (C) as defined in the description.Type: GrantFiled: August 26, 1992Date of Patent: April 26, 1994Assignee: Agfa-Gevaert, N.V.Inventors: David R. Terrell, Frans C. De Schryver, Carina Geelen, Marcel J. Monbaliu, Stefaan K. De Meutter, Mark G. Van der Auweraer, Guy P. Verbeek
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Patent number: 5300784Abstract: A selenium alloy electrophotographic imaging member having an optically transparent NESA coated substrate. An x-ray image is formed from the side of the photoreceptor opposite the transparent substrate and then is scanned from the back side through the transparent substrate with a fine beam of light, the position of which is precisely monitored. The ensuing discharge from the light beam is detected by a non-contacting x-ray transparent electrode located on the outer side of the photoreceptor, away from the substrate, which reads the discharge signal through capacitive coupling, pixel by pixel, according to the position of the light beam, to form a high resolution raster pattern digital readout of the image.Type: GrantFiled: June 1, 1992Date of Patent: April 5, 1994Assignee: Xerox CorporationInventors: William D. Fender, Eddie M. Zanrosso, Algird G. Leiga, Lothar S. Jeromin, Phillip G. Perry
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Patent number: 5290649Abstract: An electrophotographic photoreceptor is formed by a photosensitive layer containing a naphtylhydrazone compound of the formula: ##STR1## wherein X and Y are independently a hydrogen atom, lower alkyl group, lower alkoxy group, phenoxy group or arylalkoxy group; R.sup.1 is a naphtyl group; R.sup.2 is a hydrogen atom, lower alkyl group, allyl group, substituted or unsubstituted phenyl group, or aralkyl group; and l and m are 1 or 2. The photoreceptor thus formed is not only highly sensitive but resistant to ozone deterioration, which markedly improves the durability thereof.Type: GrantFiled: September 16, 1988Date of Patent: March 1, 1994Assignee: Mitsubishi Chemical Industries Ltd.Inventors: Tetsumi Suzuki, Hitoshi Ono, Osamu Ando
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Patent number: 5286589Abstract: An electrophotographic photosensitive member has a photosensitive layer on an electroconductive support. The photosensitive layer comprises a compound having a structure represented by the general formula (1) or (2) as a charge-generating material: ##STR1## wherein A.sub.1 and A.sub.3 are respectively an alkyl radical, an aralkyl radical, an aromatic radical or a heterocyclic radical which may have a substituent; A.sub.2 is hydrogen atom, or an alkyl radical, an aralkyl radical, an aromatic radical, or a heterocyclic radical which may have a substituent; A.sub.1 and A.sub.2 may be the same with or different from each other; A.sub.1 and A.sub.2 may be linked together to form a ring; and n is an integer of 1, 2, or 3.Type: GrantFiled: November 12, 1992Date of Patent: February 15, 1994Assignee: Canon Kabushiki KaishaInventors: Shintetsu Go, Kazushi Iuchi, Toshie Miyaji, Hajime Miyazaki, Hideyuki Takai, Masakazu Matsumoto
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Patent number: 5284728Abstract: An electrophotographic photoreceptor comprising an electrically conductive support and a photosensitive layer formed thereon, wherein said photosensitive layer contains at least one member selected from the group consisting of hydrazone compounds of the formulas (I), (II) and (III): ##STR1## wherein X is a hydrogen atom or a group of the formula (IV):--C(R.sup.8).dbd.N--Q.sup.2 (IV)Q.sup.1 is a group of the formula (V), (VI), (VII), (VIII) or (IX); Q.sup.2 is a group of the formula (VI), (VII), (VIII), (IX) or (X); each of Q.sup.3 and Q.sup.Type: GrantFiled: April 30, 1992Date of Patent: February 8, 1994Assignee: Mitsubishi Kasei CorporationInventors: Tetsuo Murayama, Hitoshi Ono, Atsuo Saita, Sumiko Watabe
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Patent number: 5283144Abstract: A photoreceptor includes a charge generating layer having: 1) a photogenerating pigment purified by sublimation at a pressure not greater than 10.sup.-3 Torr and subsequent condensation of the photogenerating pigment at a temperature less than about 100.degree. C.; and 2) a film-forming binder.Type: GrantFiled: September 2, 1992Date of Patent: February 1, 1994Assignee: Xerox CorporationInventors: Anthony T. Ward, George Liebermann, Ah-Mee Hor, Giuseppa Baranyi, Donald J. Teney
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Patent number: 5281503Abstract: A photogenerating pigment has the formula: ##STR1## wherein A is the residual structure of an aromatic amine, p is an integer 1, 2, 3, 4, etc. depending on the amine structure, m is an integer 0, 1, 2, 3, or 4 and X may be selected from the group including but not limited to F, Cl, Br, NO.sub.2, CN, OH, NH.sub.2, OCH.sub.3, OCH.sub.2 CH.sub.3, CF.sub.3, alkyl and aromatic groups.Type: GrantFiled: April 17, 1992Date of Patent: January 25, 1994Assignee: Xerox CorporationInventors: Kock-Yee Law, Ihor W. Tarnawskyj
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Patent number: 5274084Abstract: An azo compound represented by the following general formula IA and an electrophotographic photosensitive member comprising a photosensitive layer containing the azo compound: ##STR1## wherein R.sup.1 and R.sup.2 are the same or different from each other and indicate a hydrogen atom, an alkyl group, an alkenyl group, a hydroxyl group, an alkoxy group, a carboxy group, an alkoxy carbonyl group, an acyl group, an aryl group, a halogen group or a cyano group, respectively; R.sup.14 indicates a hydrogen atom, a halogen group, an alkyl group, an alkoxy group, an aryl group, an amino group, a cyano group, a nitro group or a sulfoxide group; and A indicates a coupler residue having an acceptor property.Type: GrantFiled: November 24, 1992Date of Patent: December 28, 1993Assignee: Mita Industrial Co., Ltd.Inventors: Eiichi Miyamoto, Yasuyuki Hanatani, Hiroaki Iwasaki, Yasufumi Mizuta, Akihiko Kawahara
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Patent number: 5272028Abstract: An electrophotographic photosensitive member has a photosensitive layer provided on an electroconductive support. The photosensitive layer contains an azo pigment represented by the general formula (I): ##STR1## wherein Ar.sub.1 and Ar.sub.2 are respectively a divalent aromatic hydrocarbon group or a divalent heterocyclic group which may be the same or different and may have a substituent, and A.sub.1 and A.sub.2 are respectively a coupler residue having a phenolic hydroxyl group which may be the same or different.Type: GrantFiled: September 7, 1990Date of Patent: December 21, 1993Assignee: Canon Kabushiki KaishaInventors: Yoshio Kashizaki, Hajime Miyazaki, Toshie Miyaji
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Patent number: 5272030Abstract: An enamine derivative containing a fluoroalkyl group, a fluoroaryl group or a fluoroaralkyl group is effective as a charge transport material in an electrophotographic member excellent in sensitivity, residual potential, durability and the like electrophotographic properties.Type: GrantFiled: March 20, 1991Date of Patent: December 21, 1993Assignee: Hitachi Chemical Company, Ltd.Inventors: Yoshii Morishita, Shigeru Hayashida, Yasushi Sugimoto, Hiroko Ishikawa, Hiroshi Kobayashi, Takaaki Sonoda
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Patent number: 5268246Abstract: An electrophotographic photoconductor is composed of an electroconductive support and a photoconductive layer formed thereon comprising a novel pyrene-ring-containing olefin compound having formula [I]: ##STR1## wherein R.sup.1 and R.sup.2 each represent hydrogen or an alkyl group which may have a substituent; Y is an aliphatic hydrocarbon group which may have a substituent, a cyclic hydrocarbon group which may have a substituent, or an aromatic group which may have a substituent; n is an integer of 0 or 1, and m is an integer of 1 to 3, provided that when n is 0, m is 1, R.sup.1 is hydrogen, and Y is an aromatic group with a substituent ##STR2## R.sup.5 and R.sup.3 each represent hydrogen, and Y and R.sup.1 may be bonded to form a ring, a method of synthesizing the pyrene-ring-containing olefin compound and an intermediate therefor are disclosed.Type: GrantFiled: April 9, 1991Date of Patent: December 7, 1993Assignee: Ricoh Company, Ltd.Inventors: Tamotsu Aruga, Masaomi Sasaki, Tomoyuki Shimada, Hiroshi Adachi
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Patent number: 5258251Abstract: The present invention provides a hydrazone compound represented by the following general formula (1). This compound has higher hole mobility as compared with an electric charge transferring material such as the conventional hydrazone compound or the like. Accordingly, when this compound is contained in a photosensitive layer as the electric charge transferring material, there may be obtained an electrophotosensitive material excellent in sensitivity, charging ability and repeat characteristics. ##STR1## (wherein R.sup.1, R.sup.2, R.sup.3, R.sup.4 and R.sup.5 are the same as or different from one another, and each is a hydrogen atom, a halogen atom, an alkyl group or an alkoxy group.Type: GrantFiled: March 23, 1992Date of Patent: November 2, 1993Assignee: Mita Industrial Co., Ltd.Inventors: Yasuyuki Hanatani, Hiroaki Iwasaki
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Patent number: 5250377Abstract: Aromatic diolefinic compounds including 1,4-divinylbenzene derivatives, which are useful not only as organic photoconductive materials for electrophotography, but also as intermediates for producing diethyl aromatic compounds which are also useful as organic photoconductive materials for electrophotography, the aromatic diethyl compounds, an electrophotographic photoconductor containing any of the above aromatic diethyl compounds in a photosensitive layer thereof, and a charge transporting medium containing any of the aromatic diethyl compound are disclosed.Type: GrantFiled: February 21, 1992Date of Patent: October 5, 1993Assignee: Ricoh Company, Ltd.Inventors: Tomoyuki Shimada, Masaomi Sasaki, Mitsuru Hashimoto
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Patent number: 5246808Abstract: The present invention provides a hydrazone compound of the following general formula (I). This compound presents a higher hole mobility as compared with a conventional electric charge transferring material such as a conventional hydrazone compound or the like. Accordingly, when a photosensitive layer contains, as the electric charge transferring material, the hydrazone compound of the present invention, there can be obtained an electrophotosensitive material which is excellent in sensitivity and charging ability and has high repeating characteristics. ##STR1## (wherein R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.5 and R.sup.6 may be same as or different from one another, and each is a hydrogen atom, an alkyl group, an alkoxy group, an aralkyl group or an aryl group, each of said alkyl, alkoxy, aralkyl and aryl groups may have a substituent group; A.sup.1, A.sup.2, A.sup.3, A.sup.4, A.sup.5 and A.sup.Type: GrantFiled: March 12, 1992Date of Patent: September 21, 1993Assignee: Mita Industrial Co., Ltd.Inventors: Yasuyuki Hanatani, Hiroaki Iwasaki
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Patent number: 5238765Abstract: An electrophotographic photosensitive member with stable potential characteristics even after repeated use, comprises an electroconductive support and a photosensitive layer formed on the electroconductive support, and that photosensitive layer contains a compound represented by the general formula (1) below: ##STR1##Type: GrantFiled: March 28, 1991Date of Patent: August 24, 1993Assignee: Canon Kabushiki KaishaInventors: Akihiro Senoo, Tetsuro Kanemaru, Masakazu Matsumoto
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Patent number: 5230975Abstract: The alkoxy squaraines essentially as represented by the formula ##STR1## wherein R.sub.1, R.sub.2, R.sub.3, and R.sub.4 independently represent alkyl or aryl groups; X is hydrogen, halogen, alkyl, hydroxy, or alkoxy; and n is a number of from 0 to about 2.Type: GrantFiled: November 4, 1991Date of Patent: July 27, 1993Assignee: Xerox CorporationInventor: Kock-Yee Law
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Patent number: 5230976Abstract: Electrophotographic imaging members are disclosed which incorporate a charge transport layer comprising an arylamine/siloxane polymer.Type: GrantFiled: December 27, 1991Date of Patent: July 27, 1993Assignee: Xerox CorporationInventors: Richard L. Schank, John Yanus
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Patent number: 5229237Abstract: An electrophotographic photosensitive member is produced by coating an electroconductive substrate with a compound represented by formula (1) shown below and a compound represented by formula (2) shown below respectively by spray-coating through separate spraying means to form a photosensitive layer containing the compounds represented by the formulae (1) and (2) respectively on the electroconductive substrate: ##STR1## In the above formulae (1) an (2), Ar.sub.1 and Ar.sub.2 independently denote an aromatic hydrocarbon ring which may have a substituent, a heterocyclic aromatic ring which may have a substituent, or a ring assembly formed by bonding the aromatic rings directly or through an aromatic or non-aromatic bonding group; and R.sub.1 -R.sub.5 independently denote hydrogen atom, halogen atom, alkyl group, alkoxy group, nitro group or cyano group.Type: GrantFiled: April 10, 1991Date of Patent: July 20, 1993Assignee: Canon Kabushiki KaishaInventors: Yoichi Kawamorita, Hisao Maruyama, Kazushige Nakamura
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Patent number: 5223364Abstract: The electrophotographic photoconductor of the present invention includes a conductive substrate and a photosensitive layer containing perylene pigment as a charge generating material formed on the conductive substrate. The X-ray diffraction peak of the perylene pigment exhibits its peak when the value of 2.theta. is 14.degree.(.+-.0.3.degree.), and the half-width of the peak when the value of 2.theta. is 14.degree. (.+-.0.3.degree.) is 0.5 or more. This electrophotographic photoconductor has excellent qualities of low residual potential and stabilized quality.Type: GrantFiled: July 2, 1991Date of Patent: June 29, 1993Assignee: Mita Industrial Co., Ltd.Inventors: Tatsuo Maeda, Eiichi Miyamoto, Nariaki Muto
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Patent number: 5223362Abstract: A laminated organic photosensitive material which comprises an electroconductive support, a charge producing layer and a charge transporting layer formed thereon wherein the charge producing layer contains X-type nonmetal phthalocyanine as a charge producing substance and the charge transporting layer contains an arylaldehydehydrazone derivative of the general formula: ##STR1## wherein R.sup.1, R.sup.2, R.sup.3 and R.sup.4 are each an alkyl or an aryl group.Type: GrantFiled: July 19, 1990Date of Patent: June 29, 1993Assignee: Bando Chemical Industries, Ltd.Inventors: Tomokazu Kobata, Yosuke Matsui
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Patent number: 5219692Abstract: An electrophotographic photoconductor comprising an electroconductive support, and a photoconductive layer formed thereon comprising at least one tertiary amine compound having a condensed polycyclic hydrocarbon group of formula (I): ##STR1## wherein A.sup.1 and A.sup.2 each independently represent an unsubstituted or substituted alkyl group or aryl group, and Ar represents an unsubstituted or substituted condensed polycyclic hydrocarbon group. Furthermore, novel tertiary amine compounds having a condensed polycyclic hydrocarbon group are disclosed.Type: GrantFiled: March 8, 1990Date of Patent: June 15, 1993Assignee: Ricoh Company, Ltd.Inventors: Tomoyuki Shimada, Masaomi Sasaki, Tamotsu Aruga
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Patent number: 5215842Abstract: A photosensitive element for electrophotography has an electrically conductive substrate and a layer structure thereon comprising a charge generating substance and a charge transport substance. An improved charge transport substance is a derivative of triphenylamine in which at least 80% of the electrons in the highest occupied molecular orbital are located on the triphenylamine skeleton. Examples of such compounds have the following formula: ##STR1## wherein X is a an optionally substituted heterocyclic radical containing at least one ring nitrogen, Q is a single bond or --C.dbd.C--, and Z.sub.1, Z.sub.2 and Z.sub.3 are H, lower alkyl or alkoxy, aryl, NO.sub.2, CF.sub.3, --N(R').sub.2, --S--C.sub.6 H.sub.5 or --S(R').sub.2.Type: GrantFiled: January 8, 1991Date of Patent: June 1, 1993Assignees: Hitachi, Ltd., Hitachi Chemical Co., Ltd.Inventors: Sukekazu Aratani, Shigeo Suzuki, Akira Hosoya, Katuo Sugawara, Toshiro Saito, Tsuneaki Kawanishi, Noriyuki Kinjo, Yasuo Katsuya, Akira Kageyama
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Patent number: 5210301Abstract: Novel squarium compounds which have a flat photosensitivity in the wide range from visible ray region to the near infrared ray region as a charge generator and which can be prepared by reacting squaric acid and an aniline derivative, and electrophotographic photoreceptors containing the squarium compounds are disclosed.Type: GrantFiled: August 17, 1988Date of Patent: May 11, 1993Assignee: Fuji Xerox Co., Ltd.Inventors: Satoshi Saeki, Seki Kin, Kaoru Torikoshi, Hiroyuki Tanaka, Lyong S. Pu