Hydrazone Containing Patents (Class 430/58.4)
Additional nitrogen attached indirectly to the hydrazone group by nonionic bonding (Class 430/58.45)
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Publication number: 20030219662Abstract: Charge transport compounds are described that have a multiple number of hydrazone-bridged heterocyclic groups (especially julolidine groups, carbazole groups, triarylamine groups and (N,N-disubstituted)arylamine groups such as dialkarylamine groups (e.g. dimethylphenylamine; methylethylphenylamine, dipropylphenylamine, ethylepropylphenylamine, ethylbutylnaphthylamine, etc.), alkyldiarylamine groups (e.g. methyldiphenylamino, ethyldiphenylamino, etc), and triarylamino groups (e.g., triphenyl amino, trinaphthylamino, etc)) connected by a central bridging group.Type: ApplicationFiled: May 30, 2003Publication date: November 27, 2003Applicant: SAMSUNG Electronics Co. Ltd.Inventors: Nusrallah Jubran, Zbigniew Tokarski, Kam Law, Vytautas Getautis, Jonas Sidaravicius, Osvaldas Paliulis, Valentas Gaidelis, Vygintas Jankauskas
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Patent number: 6645685Abstract: Disclosed is disclosed a process for producing a printed wiring board which comprises the steps of: a) exposing a wiring board having at least one photoconductive layer in which its chargeability is changed by light exposure on at least one surface of a conductive support which comprises an insulating substrate and at least one metal conductive layer provided at least one surface thereof through a resist pattern; b) charging the photoconductive layer to form an electrostatic latent image; c) forming a toner image on the photoconductive layer by toner developing treatment; d) removing a portion of the photoconductive layer to which no toner is attached by dissolution to form a resist image; and e) removing a portion of the metal conductive layer other than a portion where the resist image is formed by etching.Type: GrantFiled: September 5, 2001Date of Patent: November 11, 2003Assignee: Mitsubishi Paper Mills LimitedInventors: Masakazu Takata, Hidetoshi Miura, Tamotsu Horiuchi, Munetoshi Irisawa, Masanori Natsuka, Kenji Tsuda, Kazuchiyo Takaoka, Kenji Hyodo
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Patent number: 6645686Abstract: An electrophotographic imaging member comprises a substrate, a charge generating layer, and a charge transport layer. The charge transport layer comprises a binder and charge transport molecules, wherein the binder eliminates or minimizes crystallization of the charge transport molecules. Optionally, an electrophotographic imaging member comprises a substrate and a single charge generating and charge transport layer. The single charge generating and charge transport layer comprises a binder, charge generating molecules and charge transport molecules, wherein the binder eliminates or minimizes crystallization of the charge transport molecules. Specific binders are PCZ-800, a PCZ-500, or a PCZ-400 polycarbonate resin.Type: GrantFiled: July 23, 2002Date of Patent: November 11, 2003Assignee: Xerox CorporationInventors: Min-Hong Fu, Colleen A. Helbig, Kent J. Evans, Kathleen M. Carmichael, June E. Schneider, David M. Skinner, Alfred H. Willnow
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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: 6544702Abstract: Charge transport layers comprise a hydrazone charge transport compound, Savinyl® yellow and an antioxidant. Dual layer photoconductors comprise the charge transport layer in combination with a substrate and a charge generation layer.Type: GrantFiled: January 27, 1999Date of Patent: April 8, 2003Assignee: Lexmark International, Inc.Inventors: Gregory Walter Haggquist, Ronald Harold Levin, Scott Thomas Mosier
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Publication number: 20030054270Abstract: A multi-active electrophotographic charge generation element comprises a conductive support, a charge generation layer (CGL) disposed on the conductive support, and a charge transport layer (CTL) disposed on the charge generation layer. The charge generation layer (CGL) includes a charge-generation material comprising an aggregated or crystalline form of a first dye or pigment and a first polymeric binder. The charge transport layer (CTL) comprises at least one charge-transport agent, a second dye or pigment having absorption in a selected spectral region that at least partially overlaps the absorption of a dissolved non-aggregated or non-crystalline form of the first dye or pigment, and a second polymeric binder. The second dye or pigment in the charge transport layer absorbs radiation in the selected spectral region that is incident on the charge transport layer, thereby shielding the charge generation layer from that radiation and mitigating visible radiation-induced photofatigue.Type: ApplicationFiled: July 22, 2002Publication date: March 20, 2003Inventors: Albert V. Buettner, Dennis R. Fronheiser, Anne F. Lairmore, David S. Weiss, Jeffrey R. Murray, Marie B. O'Regan
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Publication number: 20020051918Abstract: 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 a diphenylamine compound represented by a formula (1): 1Type: ApplicationFiled: July 24, 2001Publication date: May 2, 2002Inventors: Eiichi Miyamoto, Yoshio Inagaki, Hideaki Fukunaga
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Patent number: 6350553Abstract: A photoconductor comprises a substrate and at least one layer. The at least one layer is selected from the group consisting of charge transfer layers comprising a charge transfer molecule, polycarbonate and a first polyaryl ether selected from the group consisting of polyaryletherketones, poly(aryl-perfluoroaryl ether)s, polyaryletherketone-hydrazones, polyaryletherketone-azines and mixtures and copolymers thereof; charge generating layers comprising a pigment, a polyvinylbutyral and a second polyaryl ether selected from the group consisting of polyaryletherketones, polyarylethersulfones and mixtures and copolymers thereof; and mixtures thereof.Type: GrantFiled: January 23, 2001Date of Patent: February 26, 2002Assignee: Lexmark International, Inc.Inventor: Kasturi R. Srinivasan
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Publication number: 20010023047Abstract: A photoconductor comprises a substrate and at least one layer. The at least one layer is selected from the group consisting of charge transfer layers comprising a charge transfer molecule, polycarbonate and a first polyaryl ether selected from the group consisting of polyaryletherketones, poly(aryl-perfluoroaryl ether)s, polyaryletherketone-hydrazones, polyaryletherketone-azines and mixtures and copolymers thereof; charge generating layers comprising a pigment, a polyvinylbutyral and a second polyaryl ether selected from the group consisting of polyaryletherketones, polyarylethersulfones and mixtures and copolymers thereof; and mixtures thereof.Type: ApplicationFiled: January 23, 2001Publication date: September 20, 2001Inventor: Kasturi R. Srinivasan
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Patent number: 6287736Abstract: The present invention provides an organic photosensitive body having improved stability of the electric property at times of repeated use and at times of changes in conditions of environmental usage. Such a photosensitive body prevents the generation of image defects of memory and the like. The present invention is a function-separated laminated organic photosensitive body equipped with a photosensitive layer, having a charge generating layer and a charge transport layer laminated in sequence on top of a conductive substrate, wherein the charge transport layer contains at least one type of electron transporting compound represented by the following general formulas (I) and (II): wherein R1-R29, A1, B1, and B2 are each as defined in the specification.Type: GrantFiled: August 17, 2000Date of Patent: September 11, 2001Assignee: Fuji Electric Imaging Device Co., Ltd.Inventors: Ikuo Takaki, Seishi Terasaki
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Patent number: 6268095Abstract: The present invention provides a new charge transport agent for use in a photosensitive layer in a positive-electrification-type electrophotographic photoconductor that can be used with high speed copying machines. The electrophotographic photoconductor of the invention includes an electrically conductive substrate and a photosensitive layer on the substrate. The photosensitive layer contains a charge generation agent and an electron transport compound described by the following general formula (I). wherein R1 and R2 are each independently a halogen atom, a substituted or unsubstituted alkyl group having from 1 to 8 carbon atoms, a substituted or unsubstituted alkoxy group having form 1 to 8 carbon atoms, an arylalkyl group, a substituted or unsubstituted aryl group or a residue for forming a ring. A1 is an oxygen atom or CR3R4 where R3 and R4 are each independently a cyano group or an alkoxycarbonyl group, m is an integer from 0 to 4 and n is an integer from 0 to 5.Type: GrantFiled: October 28, 1999Date of Patent: July 31, 2001Assignee: Fuji Electric Imaging Device Co., Ltd.Inventor: Masami Kuroda
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Patent number: 6265124Abstract: A photoconductor comprises a substrate and a charge generation layer comprising a charge generation molecule and a binder selected from the group consisting of butylated reaction products of p-cresol and dicyclopentadine. The photoconductor demonstrates improved electrical characteristics in fatigue properties.Type: GrantFiled: May 31, 2000Date of Patent: July 24, 2001Assignee: Lexmark International, Inc.Inventors: Weimei Luo, Mark Thomas Bellino
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Patent number: 6245471Abstract: Charge generation layers for photoconductors comprise a charge generation compound and at least one titanate which improves at least one electrical characteristic of a photoconductor in which the charge generation layer is included. Photoconductors comprise the charge generation layer in combination with a substrate and a charge transport layer.Type: GrantFiled: April 12, 2000Date of Patent: June 12, 2001Assignee: Lexmark International, Inc.Inventors: Ronald Harold Levin, Scott Thomas Mosier
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Patent number: 6242144Abstract: An electrophotographic imaging member including a substrate, a charge generating layer, and a charge transport layer including a hole transport host material, a trace amount of a shallow trap dopant having a shallow trap electrochemical oxidation potential between about 0.02 volt and about 1.5 volts lower than that of the hole transport host and a film forming binder.Type: GrantFiled: September 11, 2000Date of Patent: June 5, 2001Assignee: Xerox CorporationInventors: Liang-Bih Lin, Markus R. Silvestri, John F. Yanus, Richard H. Nealey, Harold F. Hammond, Cindy C. Chen, Kenny-tuan T. Dinh, James M. Markovics
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Patent number: 6232025Abstract: A photoconductor comprises a substrate and at least one layer. The at least one layer is selected from the group consisting of charge transfer layers comprising a charge transfer molecule, polycarbonate and a first polyaryl ether selected from the group consisting of polyaryletherketones, poly(aryl-perfluoroaryl ether)s, polyaryletherketone-hydrazones, polyaryletherketone-azines and mixtures and copolymers thereof; charge generating layers comprising a pigment, a polyvinylbutyral and a second polyaryl ether selected from the group consisting of polyaryletherketones, polyarylethersulfones and mixtures and copolymers thereof, and mixtures thereof.Type: GrantFiled: January 10, 2000Date of Patent: May 15, 2001Assignee: Lexmark International, Inc.Inventor: Kasturi R. Srinivasan
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Patent number: 6214502Abstract: Charge generation layers comprise a charge generation compound and a binder which comprises polyvinylbutyral and phenolic resol. Dual layer photoconductors comprise the charge generation layer in combination with a substrate and a charge transport layer, in which the charge generation layer comprises a charge generation compound and a binder which comprises polyvinylbutyral and phenolic resol. Dual layer photoconductors comprise the charge generation layer in combination with a substrate and a charge transport layer, in which the charge generation layer comprises a charge generation compound and a binder which comprises polyvinylbutyral and a resin selected from the group consisting of phenol novolac and polyhydroxystyrene.Type: GrantFiled: March 28, 2000Date of Patent: April 10, 2001Assignee: Lexmark International, Inc.Inventors: Kasturei Rangan Srinivasan, Ronald Harold Levin, Garry D. Hinch, Gregory Walter Haggquist
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Patent number: 6210847Abstract: An object of the invention is to improve the photosensitivity characteristics, characteristics on repeated use and stability of a photoreceptor. A photosensitive layer formed on a conductive support of a photoreceptor contains crystalline oxotitanylphthalocyanine having major peaks in an X-ray diffraction spectrum at Bragg angles (2&thgr;±0.2°) of 7.3°, 9.4°, 9.6°, 11.6°, 13.3°, 17,9°, 24.1° and 27.2°, wherein a peak bundle formed by overlapping the peaks at 9.4° and 9.6° is the largest peak, and the peak at 27.2° is the secondary largest peak as a charge generating substance. Furthermore, it contains a bisamine compound, an N,N′-bisenamine compound, a styryl compound, an amine-hydrazone compound, a benzofuran-bishydrazone compound, a bisenamine compound, a benzofuran-bishydrazone compound or a benzofuran-bis-cyclic hydrazone compound represented by the particular structural formulae as a charge transporting substance.Type: GrantFiled: October 27, 1999Date of Patent: April 3, 2001Assignee: Sharp Kabushiki KaishaInventors: Masato Miyauchi, Kaori Fujii, Takahiro Teramoto, Yuko Takeda, Takatsugu Obata, Akihiro Kondo
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Patent number: 6207334Abstract: An electrophotographic imaging member including a substrate, a charge generating layer, a charge transport layer, and an overcoat layer including a polyvinyl butyral film forming binder, a cross linked polyamide film forming binder, and a hole transport material. A process for forming an overcoated imaging member is also disclosed.Type: GrantFiled: May 12, 2000Date of Patent: March 27, 2001Assignee: Xerox CorporationInventors: Kenny-tuan T. Dinh, Timothy J. Fuller, Markus R. Silvestri, Paul J. Defeo, Damodar M. Pai, John F. Yanus, Robert W. Nolley