Radiation-conductive Composition Contains Carbocyclic Ring Only Patents (Class 430/70)
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Publication number: 20030143475Abstract: An electrophotographic photosensitive member has a support and a photosensitive layer provided thereon. The photosensitive layer contains a carixarene compound having specific structure. Also disclosed are a process cartridge and an electrophotographic apparatus which have the electrophotographic photosensitive member.Type: ApplicationFiled: November 1, 2002Publication date: July 31, 2003Inventors: Masato Tanaka, Hideki Anayama, Hidetoshi Hirano, Atsushi Fujii, Ryuji Higashi
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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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Publication number: 20020172878Abstract: An electrophotographic photoconductor and method of manufacturing thereof exhibits excellent characteristics of residual potential and repetition potential by containment of an additive of a compound. The electrophotographic photoconductor includes a conductive substrate and a photosensitive layer on the substrate, in which the photosensitive layer contains tri(4-nitrophenyl) phosphate.Type: ApplicationFiled: April 3, 2002Publication date: November 21, 2002Inventor: Yoichi Nakamura
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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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Publication number: 20020061454Abstract: An electrophotographic photosensitive member capable of forming images with less defects, such as ghost, while retaining a high photo-sensitivity, is provided.Type: ApplicationFiled: January 24, 2001Publication date: May 23, 2002Inventors: Masato Tanaka, Hideki Anayama, Hidetoshi Hirano, Kan Tanabe, Kazue Asakura, Atsushi Fujii
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Patent number: 6335132Abstract: 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; R1, R2 and R3 independently denote a hydrogen atom or alkyl group; Ar denotes an aromatic hydrocarbon ring group capable of having a substituent, a heterocyclic group capable of having a substituent, or a combination of a plurality of these groups bonded to each other directly or via a bonding group.Type: GrantFiled: June 21, 2000Date of Patent: January 1, 2002Assignee: Canon Kabushiki KaishaInventors: Masato Tanaka, Hidetoshi Hirano, Kan Tanabe
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Patent number: 6280893Abstract: Electrophotographic photoreceptors for use in photocopiers and laser printers, among other things, possessing high electron mobility and superior photosensitivity properties. The photoreceptors of the invention utilize a photosensitive layer with a carrier transport material containing a compound which exhibits high molecular vibration. The compounds of the invention are electron transfer agents which can be dispersed in a photosensitive layer at a high concentration and can be molecularly designed to have a desired magnitude of molecular vibration.Type: GrantFiled: March 3, 1999Date of Patent: August 28, 2001Assignees: Shindengen Electric Manufacturing Co., Ltd., Yamanashi Electronics Co., Ltd.Inventors: Mitsuyo Takano, Hiroki Suzuki
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Patent number: 6180306Abstract: Disclosed are a solution for making a photoconductive layer in dry-electrophotographically manufacturing a screen of a cathode ray tube and a method using solution. By the solution, the photoconductive layer can be stored for long time and reveals a superior photoconductivity. The solution has tetraphenyl ethylene derivatives as an electron donor material responsive to the ultraviolet rays, which has structural formula (I), in which R is H, CH3, C2H5, C3H7, OCH3, OC2H5, OC3H7, or COCH3, on a condition of excepting a case where R1═R2═R3═R4═H.Type: GrantFiled: August 31, 1999Date of Patent: January 30, 2001Assignee: Orion Electric Co., Ltd.Inventors: Sang Youl Yoon, Ho Seok Shon
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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: 6027840Abstract: Disclosed is a solution for forming photoconductive layer for electrophotographically manufacturing a luminescent screen on an interior surface of a faceplate panel for a CRT. The solution consists of 0.01 to 10% by weight of bis dimethyl phenyl diphenyl butatriene, 1 to 30% by weight of polystyrene, 30 to 100% by weight of 2,5-bis(4-diethyl aminophenyl)-1,3,4-oxadiazole, against 100% by weight of polystyrene and the remainder of solvent. The photoconductive layer manufactured using the solution facilitates performing all the processes in a visible light environment with safety in work operations, because the solution contains 2,5-bis(4-diethyl aminophenyl)-1,3,4-oxadiazole, instead of trinitro fluorenone(TNF) of cancer-causing material, as ultraviolet-sensitive material.Type: GrantFiled: July 28, 1998Date of Patent: February 22, 2000Assignee: Orion Electric Co., Ltd.Inventor: Sang Youl Yoon
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Patent number: 5629116Abstract: An electrophotographic photosensitive member and a process cartridge and an electrophotographic apparatus. The process cartridge and the electrophotographic apparatus both contain the electrophotographic photosensitive member. The electrophotographic photosensitive member constitutes a conductive substrate and a photosensitive layer on the substrate.Type: GrantFiled: March 6, 1995Date of Patent: May 13, 1997Assignee: Canon Kabushiki KaishaInventors: Yoshio Kashizaki, Akihiro Senoo, Masato Tanaka
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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: 5565288Abstract: An electrophotographic photoreceptor comprises a carrier transport material, wherein the material is a benzoquinone compound represented by the following Formula (1) or (2): ##STR1## wherein Ar.sub.1 and Ar.sub.2 independently represent an aryl group or an aromatic heterocyclic group; Z, Z.sub.1 and Z.sub.2 independently represent .dbd.C (CN).sub.2, .dbd.C (CO.sub.2 R'), .dbd.C(CN) (CO.sub.2 R), .dbd.C(CN) (COR) or .dbd.N(CN) in which R and R' represent a substituted or unsubstituted alkyl or aryl group; and B represents an arylene group or a divalent aromatic heterocyclic group.Type: GrantFiled: April 20, 1995Date of Patent: October 15, 1996Assignee: Konica CorporationInventors: Kazumasa Watanabe, Shingo Fujimoto, Yuanhu Pei, Toyoko Shibata
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Patent number: 5477360Abstract: A liquid crystal display device comprising a liquid crystal cell including a pair of substrates each having an alignment film on the surface thereof, and a liquid crystal filled in a space between the substrates, which is provided with a plurality of alignment regions, each region having the direction of alignment or the rise direction of liquid crystal molecule different from another region within a display region. The alignment film comprises a polyimide having a glass transition point of 300.degree. to 400.degree. C., a skeleton having no two-revolution axis, non-conjugated carbon occupying 10 to 60% of the total number of carbon excluding carbon atoms directly connected to imido group, a relative dielectric constant of 4 to 7 at a frequency of 1 kH and at a temperature of 20.degree. C.Type: GrantFiled: April 22, 1994Date of Patent: December 19, 1995Assignee: Kabushiki Kaisha ToshibaInventors: Kazuyuki Sunohara, Rei Hasegawa, Hiroyuki Nagata, Takeshi Yamamoto, Yasuhiro Yamamoto, Masumi Okamoto
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Patent number: 5387487Abstract: An electrophotographic photoconductor is composed of an electroconductive support, and a photoconductive layer formed on the electroconductive support, which contains a charge generating material and a charge transporting material consisting of an .alpha.-cyanostilbene compound of formula (I): ##STR1## wherein R.sup.1 and R.sup.2 each represent a phenyl group, a polycyclic aromatic group selected from the group consisting of a naphthyl group, an anthracenyl group, a phenanthrenyl group, and a pyrenyl group, or a heterocyclic group selected from the group consisting of a pyridyl group, a furanyl group, and a quinolyl group.Type: GrantFiled: August 28, 1992Date of Patent: February 7, 1995Assignee: Ricoh Company, Ltd.Inventors: Masayuki Shoshi, Masakatsu Shimoda, Masahiro Taniucchi, Akio Kojima, Masao Yoshikawa, Tetsuro Suzuki
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Patent number: 5376486Abstract: The present invention provides an electrophotographic photoreceptor high in sensitivity and endurance and highly resistant against oxidizing action with ozone or the like which comprises an electrically conductive support and, provided thereon, a light-sensitive layer which contains at least one azo compound containing a coupler component represented by the following formula [I] or [II]: ##STR1## wherein X represents a heterocyclic or aromatic ring residue which may have a substituent fusing with the benzene ring, Y represents a linkage group, R.sup.1 -R.sup.4 each represents a hydrogen atom or an alkyl group and R.sup.5 represents a hydrogen atom or an alkyl, aralkyl or acyl group which may have a substituent; ##STR2## wherein X and Y are as defined above and R.sup.6 and R.sup.7 each represents a hydrogen atom or an alkyl group which may have a substituent.Type: GrantFiled: June 14, 1993Date of Patent: December 27, 1994Assignee: Mitsubishi Paper Mills LimitedInventors: Akira Itoh, Hideki Nagamura
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Patent number: 5370954Abstract: An electrophotographic photoconductor is composed of an electroconductive support and a photoconductive layer formed thereon which contains a charge generating material and a charge transporting material. The charge generating material is composed of a particular triasazo compound and a particular disazo compound. A photoconductive composition useful as a photoconductive material is also composed of the trisazo compound and the disazo compound.Type: GrantFiled: April 16, 1993Date of Patent: December 6, 1994Assignee: Ricoh Company, Ltd.Inventors: Katsuichi Ohta, Masaomi Sasaki, Mitsuru Hashimoto, Kazuya Ishida, Tomoyuki Shimada
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Patent number: 5344736Abstract: An electrophotographic photoreceptor is provided with a photosensitive layer, which contains an azo compound represented by the following g general formula (1): ##STR1## wherein A means a coupler residuum having phenolic OH radicals, R.sub.1 and R.sub.2 designate, respectively, a radical of an integer of, both, m=0.about.4, n =0.about.4, selected from the group consisting of hydrogen, halogen atoms, alkyl group, alkoxy group, and di-substituted amino group.The electrophotographic photoreceptor of this invention has excellent electrification characteristics, sensitivity characteristics and image-forming property as well as good sensitivity. In addition, its sensitivity and electrification characteristics undergo less variations even when employed repeatedly. It also undergoes little light-induced fatigue. It has high weatherability.Type: GrantFiled: March 2, 1993Date of Patent: September 6, 1994Assignee: Dainichiseika Color & Chemicals Mfg. Co., Ltd.Inventors: Nakaji Komiyama, Hisao Kouno, Kazuhiro Higashide, Osamu Suda, Masaru Hasegawa
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Patent number: 5314779Abstract: A process for the preparation of layered photoconductive imaging members which comprises forming layers comprised of a mixture of cyclic oligomers with degrees of polymerization of from about 2 to about 20 and a catalyst, wherein one layer contains a conductive filler, the second layer contains a photogenerating pigment and the third layer contains charge transporting molecules, and heating said layers to convert the cyclic oligomer mixture in each layer to a polycarbonate resin.Type: GrantFiled: August 24, 1992Date of Patent: May 24, 1994Assignee: Xerox CorporationInventors: Peter G. Odell, Trevor I. Martin
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Patent number: 5302484Abstract: A process for the preparation of supporting substrates which comprises heating a mixture of cyclic oligomers with degrees of polymerization of from about 2 to about 20 and a catalyst.Type: GrantFiled: August 24, 1992Date of Patent: April 12, 1994Assignee: Xerox CorporationInventors: Peter G. Odell, Trevor I. Martin
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Patent number: 5256510Abstract: The present invention relates to a photoelectrographic element having a conductive layer in electrical contact with an acid photogenerating layer which is free of photopolymerizable materials and contains an electrically insulating binder and acid photogenerator. A dye which absorbs near-infrared radiation is included in the photoelectrographic element so that the element, when used in electrostatic copying, can be exposed with near-infrared radiation. A method for forming images with this element is also disclosed.Type: GrantFiled: March 2, 1992Date of Patent: October 26, 1993Assignee: Eastman Kodak CompanyInventors: Douglas E. Bugner, William Mey, Dennis R. Kamp
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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: 5244767Abstract: The present invention relates to a photoelectrographic element having a conductive layer in electrical contact with an acid photogenerating layer which is free of photopolymerizable materials and contains an electrically insulating binder and acid photogenerator. A pigment which absorbs near-infrared radiation is included in the photoelectrographic element so that the element, when used in electrostatic copying, can be exposed with near-infrared radiation. A method for forming images with this element is also disclosed.Type: GrantFiled: June 24, 1992Date of Patent: September 14, 1993Assignee: Eastman Kodak CompanyInventors: Douglas E. Bugner, William Mey, G. Gary Fulmer
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Patent number: 5221590Abstract: The present invention relates to a photoelectrographic element having a conductive layer in electrical contact with an acid photogenerating layer which is free of photopolymerizable materials and contains an electrically insulating binder and an onium acid photogenerator. A dye or pigment which undergoes a color density or hue shift upon exposure with radiation is included in the photoelectrographic element. A method for forming images with this element is also disclosed.Type: GrantFiled: April 15, 1991Date of Patent: June 22, 1993Assignee: Eastman Kodak CompanyInventor: Douglas E. Bugner
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Patent number: 5213923Abstract: Disclosed is a photosensitive material for the electrophotography, comprising as the charge-transporting substance a composition comprising an organic polysilane and a member selected from the group consisting of an electron-accepting substance, a diphenoquinone derivative, a low-molecular-weight hole-transporting substance, a high-molecular-weight polycyclic hindered phenol and an n-type charge-generating substance. Even if this photosensitive material is subjected to charging and light exposure repeatedly or irradiated with ultraviolet rays, quantities of charges of the surface voltage and residual voltage are very small, and the photosensitive material has an excellent resistance to the repetition of charging and light exposure operations and an excellent light resistance.Type: GrantFiled: October 30, 1990Date of Patent: May 25, 1993Assignee: Mita Industrial Co., Ltd.Inventors: Masaaki Yokoyama, Eiichi Miyamoto, Yasuhiro Yamaguchi
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Patent number: 5176976Abstract: An organic electronic material comprises a compound represented by the following formula (I). ##STR1## The compounds transport electrons and is excellent in durability when used in a photosensitive layer of an electrophotographic photosensitive member.Type: GrantFiled: April 5, 1991Date of Patent: January 5, 1993Assignee: Canon Kabushiki KaishaInventors: Toshihiro Kikuchi, Akio Maruyama
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Patent number: 5168025Abstract: 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 and Ar.sup.2 which may be the same or different, is an arylene group which may have substituents, each of R.sup.1, R.sup.2, R.sup.3 and R.sup.4 which may be the same or different, is an alkyl group which may have substituents, an aryl group which may have substituents, or a heterocyclic group which may have substituents, provided that R.sup.1 may, together with R.sup.2 or Ar.sup.1, form a ring containing the adjacent nitrogen atom, and R.sup.3 may, together with R.sup.4 or Ar.sup.2, form a ring containing the adjacent nitrogen atom, each of R.sup.5, R.sup.6, R.sup.7 and R.sup.Type: GrantFiled: September 11, 1991Date of Patent: December 1, 1992Assignee: Mitsubishi Kasei CorporationInventors: Hitoshi Ono, Atsuo Saita
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Patent number: 5166024Abstract: The present invention relates to a photoelectrographic element having a conductive layer in electrical contact with an acid photogenerating layer which is free of photopolymerizable materials and contains an electrically insulating binder and acid photogenerator. A pigment which absorbs near-infrared radiation is included in the photoelectrographic element so that the element, when used in electrostatic copying, can be exposed with near-infrared radiation. A method for forming images with this element is also disclosed.Type: GrantFiled: December 21, 1990Date of Patent: November 24, 1992Assignee: Eastman Kodak CompanyInventors: Douglas E. Bugner, William Mey, G. Gary Fulmer
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Patent number: 5166019Abstract: The present invention relates to a photosensitive member comprising a specified distyryl compound as a charge transporting material. The specified distyryl compound may be used in combination with a specified silicone oil and a specified butyrated phenol.Type: GrantFiled: December 17, 1991Date of Patent: November 24, 1992Assignee: Minolta Camera Kabushiki KaishaInventors: Hideaki Ueda, Shigeaki Tokutake, Keiichi Inagaki
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Patent number: 5137794Abstract: An electrophotographic photosensitive member having a conductive substrate and a photosensitive layer thereon. The photosensitive layer contains a compound represented by the following formula (1): ##STR1## wherein Ar.sub.1 and Ar.sub.2 are the same or different and are each a substituted or unsubstituted bivalent carbocyclic aromatic group or a substituted or unsubstituted bivalent heterocyclic aromatic group; R.sub.1 and R.sub.2 are each a hydrogen atom, a substituted or unsubstituted alkyl group, a substituted or unsubstituted aralkyl group or a substituted or unsubstituted aryl group; and A.sub.1 and A.sub.2 are each a coupler residue having a phenolic hydroxyl group, wherein A.sub.1 and A.sub.2 are the same or different.Type: GrantFiled: June 12, 1991Date of Patent: August 11, 1992Assignee: Canon Kabushiki KaishaInventor: Toshihiro Kikuchi
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Patent number: 5134050Abstract: The improved photoreceptor has a light-sensitive layer that contains as carrier generation materials both a polycylic quinone compound selected from among specified anthanthrone pigments, dibenzpyrene pigments and pyranthrone pigments and a specified bisazo pigment, and that also contains a specified stilbene compound as a carrier transport material. This photoreceptor has good spectral sensitivity characteristics over a broad range of wavelengths, has high sensitivity, has a long cycle life on account of reduced residual potential, is adapted for fast copying processes, and is capable of copying red images with improved fidelity of reproduction.Type: GrantFiled: June 28, 1990Date of Patent: July 28, 1992Assignee: Konica CorporationInventors: Yoshihiko Eto, Yoshiaki Takei
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Patent number: 5120629Abstract: High resolution photosensitive electrostatic master which forms conductive exposed image areas upon imagewise exposure comprising an electrically conductive substrate bearing a photosensitive layer consisting essentially of at least one acid labile compound which decomposes to form acid, and a photoinitiator or photoinitiating system which upon exposure generates a catalytic amount of a strong acid. A xeroprinting process from producing positive images in said photosensitive layer of the master is also disclosed. The master is useful in the graphic arts field. e.g., making color proofs, preparation of printing circuit boards, resists, solder masks, etc.Type: GrantFiled: April 10, 1990Date of Patent: June 9, 1992Assignee: E. I. du Pont de Nemours and CompanyInventors: Richard D. Bauer, Catherine T. Chang
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Patent number: 5106712Abstract: A novel electrophotographic photoreceptor is provided comprising on an electrically conductive support a layer containing a charge carrier-transporting compound and a charge carrier-generating compound or a charge carrier-transporting compound-containing layer and a charge-generating compound-containing layer, characterized in that as said charge carrier-generating compound there is contained a novel bisazo compound represented by the general formula (1-A), (1-B) or (1-C):Cp--N.dbd.N--Ar.sup.1 --C.tbd.C--.sub.n Ar.sup.2 --N.dbd.N--Cp (1-A)wherein Ar.sup.1 and Ar.sup.2 each represents an arylene group, divalent condensed polycyclic aromatic group or divalent heterocyclic aromatic group; Cp represents a coupler residue; and n represents an integer 2 or 3;Cp--N.dbd.N--Ar.sup.1 --C.tbd.C--Ar.sup.2 --C.tbd.C--Ar.sup.3 --C.tbd.C--Ar.sup.4 --N.dbd.N--Cp (1-B)wherein Ar.sup.1, Ar.sup.2, Ar.sup.3 and Ar.sup.Type: GrantFiled: July 6, 1990Date of Patent: April 21, 1992Assignee: Fuji Photo Film Co., Ltd.Inventors: Katsugi Kitatani, Naonori Makino, Satoshi Hoshi
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Patent number: 5093219Abstract: A novel electrophotographic photoreceptor is provided comprising a light-sensitive layer containing at least one of acetylene compounds represented by general formula (I) provided on an electrically conductive support:Ar.sup.1 C.tbd.C--AR.sup.3 --C.tbd.C--AR.sup.2 (I)wherein Ar.sup.1 and Ar.sup.2 each represents an aromatic carbon ring or aromatic heterocyclic group; and Ar.sup.3 represents an arylene group, divalent condensed polycyclic aromatic group or divalent aromatic heterocyclic group.Type: GrantFiled: August 17, 1990Date of Patent: March 3, 1992Assignee: Fuji Photo Film Co., Ltd.Inventors: Naonori Makino, Satoshi Hoshi, Katsugi Kitatani
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Patent number: 5084592Abstract: Azulenesquaric acid dyes of the formula ##STR1## where R.sup.1, R.sup.2, R.sup.3, R.sup.4 and R.sup.5 each have specified meanings are prepared from azulene derivatives of the formula ##STR2## where R.sup.1, R.sup.2, R.sup.3, R.sup.4 and R.sup.5 each have specified meanings as intermediates, and used in an optical recording medium.Type: GrantFiled: September 30, 1988Date of Patent: January 28, 1992Assignee: BASF AktiengesellschaftInventors: Wolfgang Schrott, Peter Neumann, Sibylle Brosius, Helmut Barzynski, Klaus D. Schomann, Harald Kuppelmaier
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Patent number: 5079118Abstract: A photosensitive member for electrophotography, comprising an electroconductive substrate and a photosensitive layer disposed thereon, wherein the photosensitive layer comprises a pyrene compound represented by the following general formula (I): ##STR1## wherein Ar.sub.1 and Ar.sub.2 respectively denote and aromatic hydrocarbon group capable of having a substituent, or an aromatic heterocyclic group capable of having a substituent.Type: GrantFiled: January 19, 1990Date of Patent: January 7, 1992Assignee: Canon Kabushiki KaishaInventors: Toshihiro Kikuchi, Tetsuro Kanemaru, Akihiro Senoo, Ryoji Yashiro
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Patent number: 5079119Abstract: A photoreceptor having at least a light-sensitive layer, which photoreceptor contains a compound represented by the following general formula (1): ##STR1## where Ar.sup.1, Ar.sup.2 and Ar.sup.3 each represents a substituted or unsubstituted alkyl group,a substituted or unsubstituted aryl group or a substituted or unsubstituted heterocyclic group, provided that Ar.sup.1 and Ar.sup.2 may form a ring together with the nitrogen atom to which they are bound; R.sup.1, R.sup.2, R.sup.3 and R.sup.4 each represents a hydrogen atom, a halogen atom, an alkoxy group, or a substituted or unsubstituted alkyl group.Type: GrantFiled: February 22, 1990Date of Patent: January 7, 1992Assignee: Konica CorporationInventors: Shinichi Suzuki, Hirofumi Hayata, Osamu Sasaki
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Patent number: 5077163Abstract: An electrophotographic photoreceptor having a layer that contain at least one compound represented by the following general formula (I): ##STR1## where R.sub.1 and R.sub.2 each represents an optionally substituted alkyl, aralkyl, aryl or heterocyclic group, provided that R.sub.1 and R.sub.2 may combine to form a cyclic amino group containing a nitrogen atom; X.sub.1 and X.sub.2 each represents a hydrogen atom, a hydroxyl group, a lower alkyl group having 1-5 carbon atoms, a lower alkoxy group having 1-5 carbon atoms, a halogen atom, an allyl group, an aryl group or an acylamino group.Type: GrantFiled: May 30, 1990Date of Patent: December 31, 1991Assignee: Konica CorporationInventors: Hirofumi Hayata, Osamu Sasaki, Shinichi Suzuki
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Patent number: 5053302Abstract: A novel electrophotographic photoreceptor is provided comprising on an electrically conductive support a layer containing a charge-transporting compound and a charge-generating compound or a charge-transporting compound-containing layer and a charge-generating compound-containing layer, characterized in that as said electric charge-generating compound there is contained an azo compound containing an organic residue represented by general formula (1): ##STR1## wherein Ar.sup.2 represents a divalent aromatic hydrocarbon or aromatic heterocyclic group; Ar.sup.3 represents an aromatic hydrocarbon group or aromatic heterocyclic group; and Q represents a hydrogen atom, halogen atom, alkyl group, trifluoromethyl group, nitro group, cyano group or alkoxy group. In a preferred embodiment, the azo compound is represented by the general formula (2): ##STR2## wherein Ar.sup.1 represents an aromatic hydrocarbon group or aromatic heterocyclic group which may be connected thereto via a connecting group; Ar.sup.2 and Ar.sup.Type: GrantFiled: May 15, 1990Date of Patent: October 1, 1991Assignee: Fuji Photo Film Co., Ltd.Inventors: Naonori Makino, Satoshi Hoshi, Katsuji Kitatani
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Patent number: 5037575Abstract: A squarilium compound represented by the following formula (I) and a liquid crystal composition containing the same are disclosed: ##STR1## wherein X and Y each represents ##STR2## wherein R.sup.1 represents a hydrogen atom, an alkyl group, a substituted or unsubstituted aryl group or a substituted or unsubstituted aralkyl group; R.sup.2, R.sup.3 and R.sup.4 each represents a hydrogen atom, an alkyl group or a substituted or unsubstituted alkoxy group; R.sup.5 represents a hydrogen atom, an alkyl group, an aralkyl group or an aryl group; ring A represents a cyclic alkylene; ring B represents a substituted or unsubstituted aromatic ring; and ring C represents a heterocyclic ring containing one or two of a nitrogen atom, an oxygen atom and a sulfur atom; with proviso that X and Y are not the same when either one of them represents ##STR3## and a liquid crystal composition containing the squarilium compound of the formula (I).Type: GrantFiled: October 29, 1990Date of Patent: August 6, 1991Assignee: Mitsubishi Chemical Industries Ltd.Inventors: Konoe Miura, Tetsuo Ozawa, Junko Iwanami
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Patent number: 5008168Abstract: A photosensitive member for electrophotography comprising: an electroconductive substrate and a photosensitive layer disposed thereon comprising an organic photoconductor is provided. the photosensitive layer contains at least, a compound represented by the following formula (I): ##STR1## wherein X.sub.1 denotes a t-butyl or t-amyl group, and X.sub.2 denotes a hydrogen atom, an alkyl group having 1-10 carbon atoms or an alkenyl group having 2-10 carbon atoms; and a compound represented by the following formula (II): ##STR2## wherein X.sub.3 and X.sub.4 respectively denote an alkyl group having 1-10 carbon atoms or an alkenyl group having 2-10 carbon atoms.Type: GrantFiled: April 17, 1989Date of Patent: April 16, 1991Assignee: Canon Kabushiki KaishaInventors: Masaru Nakagawa, Fumio Sumino, Masaaki Hiro, Noboru Kashimura, Shin Nagahara
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Patent number: 4988594Abstract: A photoconductor for electrophotography comprises an electroconductive substrate and a photoconductive layer formed on the substrate and including a novel disazo compound as a charge generating layer. The disazo compound is represented by the following general formula: ##STR1## wherein X1 stands for one of an alkyl group, an aryl group and an aromatic heterocyclic group, each of which groups may be or not may be substituted, X.sub.2 stands for one of a hydrogen atom, a cyano group, a carbamoyl group, a carboxyl group, an ester group and an acyl group, each of X.sub.3 and X.sub.4 stands for one of a hydrogen atom, a halogen atom, a nitro group, an alkyl group and an alkoxyl group, both of last two groups may be or not may be substituted, Z stands for one of a hydrogen atom, an alkyl group, a cycloalkyl group, an alkenyl group, an aryl group and an aromatic heterocyclic group, each of which groups may be or not may be substituted and --N.dbd.N--D--N--N.dbd.N-- stands for a disazo residual group.Type: GrantFiled: July 26, 1989Date of Patent: January 29, 1991Assignee: Fuji Electric, Co. Ltd.Inventors: Yoshimasa Hattori, Noboru Furusho, Youichi Nakamura, Masami Kuroda
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Patent number: 4988593Abstract: An electrophotographic photosensitive member having a photosensitive layer is formed on a support and contains an azo pigment expressed by a general formula [I] or [II]: ##STR1## where A, B.sub.1 and B.sub.2 are aromatic hydrocarbon nucleus groups or heterocyclic groups which may be optionally linked by coupler groups, A is an univalent group, B.sub.1 is an univalent, bivalent or trivalent group, and B.sub.2 is a bivalent or trivalent group; X is a residue necessary for forming a polycyclic aromatic nucleus or a heterocycle by condensation with a benzene nucleus; R is a halogen atom, an alkyl group or an alkoxy group; n.sub.1 is an integer from 1 to 3; and n.sub.2 is an integer from 1 to 3. This photosensitive layer may be composed of a charge generation layer containing the above azo pigment and a charge transport layer.Type: GrantFiled: September 20, 1989Date of Patent: January 29, 1991Assignee: Canon Kabushiki KaishaInventor: Hideyuki Takai
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Patent number: 4977051Abstract: An electrophotographic photoreceptor is disclosed, which comprises an electrically conductive support having thereon a layer which contains a charge carrier transporting compound and a charge carrier generating compound, or a layer which contains charge carrier transporting compound and a layer which contains a charge generating compound, wherein at least one type of tris-azo compound represented by formula (I) is included as a charge carrier generating compound: ##STR1## wherein Ar.sub.1, Ar.sub.2, Ar.sub.3, Ar.sub.4 and A are as defined in the specification.Type: GrantFiled: November 8, 1989Date of Patent: December 11, 1990Assignee: Fuji Photo Film Co., Ltd.Inventors: Shigeru Ohno, Katsuji Kitatani, Naonori Makino, Satoshi Hoshi, Hideo Sato
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Patent number: 4960663Abstract: A persistent photoconductive coating composition contains a persistent photoconductor, photoinitiator, an acetate or phenolic hydroxyl containing resin and ketone dispersed in an inert coherent matrix.Type: GrantFiled: February 27, 1989Date of Patent: October 2, 1990Assignee: Polychrome CorporationInventors: Ken-ichi Shimazu, Jayanti Patel, Jill Tolfree
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Patent number: 4939053Abstract: The present invention relates to a photosensitive member containing a specific azo compound for a charge generating agent, which is improved in photosensitive properties, in particular, sensitivity. The specific azo compound is represented by the formula (1): ##STR1## wherein A represents an aromatic hydrocarbon or a heterocyclic ring; R.sub.1 and R.sub.2 independently represent a hydrogen, a halogen atom, or an alkyl, aralkyl, aryl, condensed polycyclic ring or condensed heterocyclic ring; or R.sub.1 and R.sub.2 combinedly form a cyclic ring; n represents an integer from 1 to 4.Type: GrantFiled: February 10, 1988Date of Patent: July 3, 1990Assignee: Minolta Camera Kabushiki KaishaInventor: Hideaki Ueda
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Patent number: 4925757Abstract: An electrophotographic photoreceptor useful for negative electrification is disclosed. The photoreceptor comprises on an electroconductive substrate, a photo-sensitive layer containing a compound represented by general formula [A]: ##STR1## wherein, R.sub.1 represents a hydrogen atom or a substituent; R.sub.2 represents a hydrogen atom, a substituted or unsubstituted alkyl group, or a substituted or unsubstituted aryl group; Ar.sub.1 represents a hydrogen atom, a substituted or unsubstituted phenyl group, a substituted or unsubstituted naphthyl group; Ar.sub.2 represents a substituted or unsubstituted phenylene group or a substituted or unsubstituted naphthylene group; Ar.sub.3 and Ar.sub.4 independently represent a substituted or unsubstituted alkyl group, a substituted or unsubstituted phenyl group or a substituted or unsubstituted naphthyl group; and n represents an integer of 0 or 1; and a compound containing in its chemical structure a hindered phenolic structure unit.Type: GrantFiled: August 4, 1988Date of Patent: May 15, 1990Assignee: Konica CorporationInventors: Shigeki Takenouchi, Akira Hirano, Shiori Saito, Yoshihide Fujimaki
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Process for the purification of Ti containing polycarbonate with solvent, complexing agent and water
Patent number: 4921940Abstract: A process for the purification of polycarbonates or copolymers thereof containing titanium catalyst residues, which comprises mixing a polycarbonate or copolymers thereof with a solvent; adding to the formed solution mixture a complexing component; admixing the resulting mixture with water; and subsequently separating the polycarbonate or copolymer product therefrom.Type: GrantFiled: August 15, 1988Date of Patent: May 1, 1990Assignee: Xerox CorporationInventors: Peter G. Odell, Giuseppa Baranyi, Lupu Alexandru -
Patent number: 4900645Abstract: The present invention relates to a photosensitive member containing a specific styryl compound for a charge transporting material, which is improved in photographic propertied such as photosensitivity and repeating properties.Type: GrantFiled: April 25, 1988Date of Patent: February 13, 1990Assignee: Minolta Camera Kabushiki KaishaInventor: Hideaki Ueda
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Patent number: 4859556Abstract: An electrophotographic photoconductor is disclosed which comprises an electroconductive support material and a photosensitive layer comprising at least one of the stilbene compounds of the formula ##STR1## wherein R.sup.1 represents hydrogen or ##STR2## R.sup.2 represents hydrogen, an alkyl group or a substituted or unsubstituted phenyl group; A represents ##STR3## when R.sup.1 is hydrogen; while, when R.sup.1 is ##STR4## A represents ##STR5## a 9-anthryl group or a substituted or unsubstituted N-alkylcarbazolyl group, wherein R.sup.3 represents hydrogen, an alkyl group, an alkoxy group, a halogen or a substituted amino group represented by ##STR6## in which R.sup.4 and R.sup.5 independently represent an alkyl group, a substituted or unsubstituted aryl group, or a substituted or unsubstituted aralkyl group, and R.sup.4 and R.sup.5 may form a ring in combination, and m is an integer of 0 through 3 and n is an integer of 0 or 1, provided that, when R.sup.1 is hydrogen and n=0, A is ##STR7## in which R.sup.Type: GrantFiled: August 9, 1988Date of Patent: August 22, 1989Assignee: Ricoh Company, Ltd.Inventor: Masaomi Sasaki