Polycyclo Ring System Patents (Class 430/71)
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Patent number: 11409233Abstract: An image forming apparatus comprising an electrophotographic photosensitive member and a developing device for supplying a toner onto the electrophotographic photosensitive member, the developing device having the toner, wherein the electrophotographic photosensitive member has a surface layer comprising a binder resin (A), the toner has a toner particle, the toner particle has a core comprising a binder resin (B) and a wax and a shell layer formed on a surface of the core, the binder resin (A) has a prescribed structure: the wax comprises a prescribed monoester compound: and a process cartridge.Type: GrantFiled: November 24, 2020Date of Patent: August 9, 2022Assignee: Canon Kabushiki KaishaInventors: Tetsuya Kinumatsu, Mariko Yamashita, Daisuke Yoshiba, Michiyo Sekiya
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Patent number: 10266325Abstract: A process of forming a polymer with a blue light absorber chemically bonded to a polymeric backbone of the polymer includes mixing one or more olefin monomers with one or more functionalized p-vinylstyrylanthracene monomers to form a mixture of reactants. The mixture includes less than 10 percent by weight of the one or more functionalized p-vinylstyrylanthracene monomers. The process also includes polymerizing the mixture to produce a polymer with one or more blue light absorption characteristics.Type: GrantFiled: June 7, 2016Date of Patent: April 23, 2019Assignee: International Business Machines CorporationInventors: Brandon M. Kobilka, Joseph Kuczynski, Jacob T. Porter, Jason T. Wertz
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Patent number: 10216124Abstract: A fuser comprises a substrate and a composite layer formed on the substrate. The composite layer comprises a fluoropolymer and at least one of (a) per-fluorosulfonated polymer-treated, carbon nanotube-comprising particles, and (b) perfluorosulfonated polymer-treated, graphene-comprising particles. Methods of making a fuser and methods of fusing toner particles are also disclosed.Type: GrantFiled: October 7, 2016Date of Patent: February 26, 2019Assignee: XEROX CORPORATIONInventors: Qi Zhang, Nan-Xing Hu, Suxia Yang, Sandra J. Gardner, Edward G. Zwartz, Yu Qi
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Patent number: 9977359Abstract: Provided is an electrophotographic member that is excellent in charge-imparting performance for a toner, and that hardly causes tackiness on its surface even when placed under a high-temperature and high-humidity environment over a long time period. The electrophotographic member includes a substrate and a surface layer, in which the surface layer satisfies the following requirements (A) and (B): (A) the surface layer contains, in a region from its surface to a depth of up to 0.1 ?m, a copolymer containing a constituent unit represented by the following structural formula (1), and at least one selected from the group consisting of a constituent unit represented by the following structural formula (2) and a constituent unit represented by the following structural formula (3); and (B) the concentration of a nitrogen atom derived from a nitrogen-containing aromatic heterocyclic amine structure in the copolymer is from 6.0 mass % to 30.0 mass %.Type: GrantFiled: February 1, 2017Date of Patent: May 22, 2018Assignee: CANON KABUSHIKI KAISHAInventors: Takashi Koyanagi, Masaki Yamada, Shohei Urushihara, Hideya Arimura
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Publication number: 20140356772Abstract: A photoconductor that includes, for example, a supporting substrate, an optional ground plane layer, an optional hole blocking layer, an optional adhesive layer, a photogenerating layer, and a charge transport layer, and where the charge transport layer contains a mixture of a charge transport component and a bio-based polycarbonate.Type: ApplicationFiled: June 3, 2013Publication date: December 4, 2014Applicant: Xerox CorporationInventor: Jin Wu
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Publication number: 20140255837Abstract: Provided is an electrophotographic photosensitive member excellent in suppression of image deletion and electric potential variation. The surface layer of the electrophotographic photosensitive member comprises a hole transporting substance. The hole transporting substance is one of a compound consisting of a carbon atom and a hydrogen atom, or a compound consisting of a carbon atom, a hydrogen atom, and an oxygen atom. The hole transporting substance comprises a conjugate structure containing 24 or more sp2 carbon atoms. The conjugate structure comprises a condensed polycyclic structure comprising 12 or more sp2 carbon atoms. A ratio of a number of sp2 carbon atoms is 55% or more based on a total number of carbon atoms in the hole transporting substance, and a ratio of a number of sp3 carbon atoms is 10% or more based on a total number of carbon atoms in the hole transporting substance.Type: ApplicationFiled: February 26, 2014Publication date: September 11, 2014Applicant: CANON KABUSHIKI KAISHAInventors: Koichi Nakata, Shinji Takagi, Nobuo Kosaka, Koichi Suzuki
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Publication number: 20140255836Abstract: A surface layer of an electrophotographic photosensitive member contains a polymerized product obtained by a polymerization reaction of a hole transporting compound having a first reactive functional group and a compound having a second reactive functional group reactable with the first reactive functional group, and a structure other than the first reactive functional group of the hole transporting compound is a structure having only a carbon atom and a hydrogen atom, or a structure having only a carbon atom, a hydrogen atom and an oxygen atom.Type: ApplicationFiled: February 26, 2014Publication date: September 11, 2014Applicant: CANON KABUSHIKI KAISHAInventors: Koichi Nakata, Shinji Takagi, Nobuo Kosaka, Koichi Suzuki
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Publication number: 20130330665Abstract: A photoconductor that includes, for example, a supporting substrate, an optional ground plane layer, an optional hole blocking layer, an optional adhesive layer, a photogenerating layer, and a charge transport layer, and where the charge transport layer contains a mixture of a charge transport component and a tetraaryl polycarbonate.Type: ApplicationFiled: June 6, 2012Publication date: December 12, 2013Applicant: Xerox CorporationInventors: Jin Wu, Kenny-Tuan T. Dinh, Than Sorn, Robert W. Hedrick, Linda L. Ferrarese, Marc J. Livecchi, Lanhui Zhang, Lin Ma, Stanley J. Pietrzykowski, JR.
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Patent number: 8461291Abstract: There is provided an electroactive material having Formula I wherein: Q is the same or different at each occurrence and can be O, S, Se, Te, NR, SO, SO2, or SiR3; R is the same or different at each occurrence and can be hydrogen, alkyl, aryl, alkenyl, or alkynyl; and R1 through R6 are the same or different and can be hydrogen, alkyl, aryl, halogen, hydroxyl, aryloxy, alkoxy, alkenyl, alkynyl, amino, alkylthio, phosphino, silyl, —COR, —COOR, —PO3R2, —OPO3R2, or CN.Type: GrantFiled: December 17, 2008Date of Patent: June 11, 2013Assignee: E I du Pont de Nemours and CompanyInventors: Hong Meng, Dengfu Wang
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Patent number: 8441003Abstract: A phosphorescent polymer compound including structural units that are derived from a compound represented by Formula (1): wherein R1 to R8 and L are as defined herein.Type: GrantFiled: June 24, 2008Date of Patent: May 14, 2013Assignee: Showa Denko K.K.Inventor: Yoshiaki Takahashi
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Patent number: 8304514Abstract: The invention provides a conjugated polymer, a method for preparing the same, and optoelectronic devices employing the same. The conjugated polymer includes a structure represented by Formula (I), wherein, R1 is independently an octyl or dodecyl group, R2 is independently an H or 1,1,3,3-tetramethylbutyl, and, n is an integer larger than 1.Type: GrantFiled: January 26, 2011Date of Patent: November 6, 2012Assignee: National Taiwan University of Science & TechnologyInventor: Der-Jang Liaw
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Patent number: 8227157Abstract: The present invention provides a single-layer electrophotographic photoreceptor provided with a single-layer photosensitive layer that adapts to an exposing source emitting a laser beam with wavelengths of from 400 nm to 450 nm inclusive and is laminated on a conductive substrate, the single-layer photosensitive layer comprising: an enamine-type compound that functions as both a charge generation material and a charge transport material and is represented by the following general formula (1); and a perylene-type compound that functions as both an electron-transport material and a sensitizer and is represented by the following general formula (2):Type: GrantFiled: June 17, 2009Date of Patent: July 24, 2012Assignee: Sharp Kabushiki KaishaInventors: Koichi Toriyama, Mami Adachi
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Patent number: 8142967Abstract: The presently disclosed embodiments relate generally to layers that are useful in imaging apparatus members and components, for use in electrostatographic, including digital, apparatuses. More particularly, the embodiments pertain to an improved electrostatographic imaging member incorporating a carbon nano tube dispersion into a high molecular weight polycarbonate and an anti-static copolymer with polyester, polycarbonate, and polyethylene glycol units in a formulation for the anti-curl back coating layer which provides a conductively suitable and stable dispersion coating solution for making an optically suitable anti-curl back coating layer.Type: GrantFiled: March 18, 2009Date of Patent: March 27, 2012Assignee: Xerox CorporationInventors: Yuhua Tong, Edward F. Grabowski, Donald J. Goodman, Kock-Yee Law, Robert C. U. Yu
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Publication number: 20120017994Abstract: The invention provides a conjugated polymer, a method for preparing the same, and optoelectronic devices employing the same. The conjugated polymer includes a structure represented by Formula (I), wherein, R1 is independently an octyl or dodecyl group, R2 is independently an H or 1,1,3,3-tetramethylbutyl, and, n is an integer larger than 1.Type: ApplicationFiled: January 26, 2011Publication date: January 26, 2012Inventor: Der-Jang LIAW
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Patent number: 8034519Abstract: Disclosed is an electrophotographic photoreceptor comprising on or over an electrically conductive support a photosensitive layer containing a pyranthrone compound represented by the following formula and the pyranthrone compound has a crystal structure exhibiting a CuK? X-ray diffraction spectrum having peaks at angles (2?±0.2°) of 12.3°, 20.5°, 25.3° and 28.3°.Type: GrantFiled: June 16, 2008Date of Patent: October 11, 2011Assignee: Konica Minolta Business Technologies, Inc.Inventors: Tomoko Sakimura, Toyoko Shibata, Shinichi Hamaguchi
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Patent number: 7985521Abstract: A photoconductor that includes, for example, a supporting substrate, a photogenerating layer, and at least one charge transport layer comprised of at least one charge transport component, and wherein at least one of the photogenerating layer and charge transport layer contains an anthracene, including derivatives thereof.Type: GrantFiled: May 30, 2008Date of Patent: July 26, 2011Assignee: Xerox CorporationInventor: Jin Wu
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Publication number: 20100055589Abstract: Exemplary embodiments provide nanotube-containing coating compositions and methods for making and using the coating compositions. In an exemplary embodiment, the coating composition can include a plurality of nanotubes (e.g., carbon nanotubes (CNTs)) dispersed stably and uniformly in a polymer matrix containing fluoropolymers. The coating composition can further include stabilizers to allow a stable and/or uniform dispersion of the plurality of nanotubes in the fluoropolymers. The nanotube coating composition can be coated on an article surface to improve mechanical robustness, and electrical and thermal conductivity of the coated article The coated article can be used as a fuser member, a fixing member, a pressure roller, or a release agent donor member in an electrostatographic printing machine or process.Type: ApplicationFiled: August 26, 2008Publication date: March 4, 2010Applicant: XEROX CORPORATIONInventors: Yu QI, Nan-Xing HU, Qi ZHANG
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Publication number: 20080166645Abstract: An organic photoreceptor is described. The photosensitive layer contains a pyranthrone compound represented by Formula 1 which has been subjected to purification processing so as to have a mass reduction ratio D400/450 between 400° C. and 450° C. of not more than 2.0% in a thermogravimetric analysis; D400/450={(G400?G450)/Gi}×100 wherein Gi is a mass at 25° C., and G400 and G450 are each mass at 400° C. and 450° C., respectively, wherein R1 through R14 are each a hydrogen atom, an alkyl group, an alkoxy group, an aryl group, a halogen atom, a cyano group or a nitro group. The image forming method using the photoreceptor, and the pyranthrone compound are also disclosed.Type: ApplicationFiled: October 16, 2007Publication date: July 10, 2008Applicant: KONICA MINOLTA BUSINESS TECHNOLOGIES, INC.Inventors: Toyoko SHIBATA, Tomoko SAKIMURA
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Patent number: 7344811Abstract: Improved organophotoreceptor comprises an electrically conductive substrate and a photoconductive element on the electrically conductive substrate, the photoconductive element comprising: (a) a polymeric charge transport material having the formula where n and m are each a distribution of integers, and the n units of R1—Si—X1—Ar1 and m units of R2—Si—X2—Ar2—X3-Z form either a random, an alternative, or a block copolymer; R1 and R2 comprise, each independently, an alkyl group, an alkoxy group, an alkenyl group, an alkynyl group, a heterocyclic group, or an aromatic group; X1, X2, and X3 comprise, each independently, a bond or a linking group; A1 and A2 are each a terminal group; Ar1 and Ar2 comprise, each independently, an aromatic group; and Z comprises a functional group; and (b) a charge generating compound. Corresponding electrophotographic apparatuses, imaging methods, and methods of preparing the polymeric charge transport material are described.Type: GrantFiled: October 28, 2004Date of Patent: March 18, 2008Assignee: Samsung Electronic Co., Ltd.Inventors: Asta Michaleviciute, Gintaras Buika, Juozas V. Grazulevicius, Zaimantas Peleckas, Edmundas Montrimas, Jonas Sidaravicius
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Patent number: 6953957Abstract: The invention generally relates to the use of poly-3,3?-dialkyl-2,2?:5?,2?-terthiophenes as charge transport materials or semiconductors in electrooptical, electronic or electroluminescent devices, and to charge transport and semiconducting components and devices comprising poly-3,3?-dialkyl-2,2?:5?,2?-terthiophenes.Type: GrantFiled: October 15, 2003Date of Patent: October 11, 2005Assignees: Merck Patent GmbH, Siemens AGInventors: Iain McCulloch, Marcus Thompson, Mark Giles, Martin Heeney, Steven Tierney, Henning Rost
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Patent number: 6165661Abstract: A mixture comprised of at least two perylenes and wherein the mixture includes symmetrical perylenes, unsymmetrical perylenes, and unsymmetrical perylenes with dissimilar R.sub.1 and R.sub.2 terminal substituents. The perylene mixtures can be selected for photoconductive imaging members.Type: GrantFiled: May 21, 1999Date of Patent: December 26, 2000Assignee: Xerox CorporationInventors: Cheng-Kuo Hsiao, Ah-Mee Hor, James M. Duff, Giuseppa Baranyi, C. Geoffrey Allen
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Patent number: 5891594Abstract: An electrophotographic imaging member having a perylene-containing charge generating layer is prepared by forming a dispersion of a perylene-containing charge generating material and a solvent including n-butylacetate and applying the dispersion to an electrophotographic imaging member layer by solution coating. The solvent may include n-butylacetate and a second solvent having a boiling point lower than that of n-butylacetate.Type: GrantFiled: January 13, 1997Date of Patent: April 6, 1999Assignee: Xerox CorporationInventors: Huoy-Jen Yuh, John S. Chambers
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Patent number: 5876891Abstract: An alternating copolymer comprising a repeating unit of the formula:--Z--(X--Y).sub.n-- (I)wherein n is at least 2, X is O, S, Se or Te, and Y and Z are independently an aromatic or substituted aromatic group, and at least one other repeating unit, which is useful as a photosensitive material used in a spatial light modulator.Type: GrantFiled: May 26, 1995Date of Patent: March 2, 1999Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Akio Takimoto, Hirofumi Wakemoto, Eiichiro Tanaka, Masanori Watanabe, Junko Asayama, Hisahito Ogawa, Shigehiro Sato, Fumiko Yokotani
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Patent number: 5759725Abstract: Disclosed is a photoconductor comprises, a material containing fullerenes and their derivatives arranged in an amorphous structure.Type: GrantFiled: November 30, 1995Date of Patent: June 2, 1998Assignee: Kabushiki Kaisha ToshibaInventors: Akiko Hirao, Hirohisa Miyamoto, Hideyuki Nishizawa, Masahiro Hosoya, Masami Sugiuchi
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Patent number: 5731078Abstract: A coated donor roll comprises a core with a coating, the coating comprising a charge transporting polymer, an organic acid metal salt compound, and iodine.Type: GrantFiled: May 30, 1995Date of Patent: March 24, 1998Assignee: Xerox CorporationInventors: Bing R. Hsieh, Joan R. Ewing, Damodar M. Pai, Kathyrn A. Wallace, Jerry H. Taylor, Francois Soos, Joseph R. Weber
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Patent number: 5731890Abstract: A compound having nonlinear optical properties of the general formula:Ar.sup.1 CR.sup.1 .dbd.CR.sup.2 (Ar.sup.2 CR.sup.3 .dbd.CR.sup.4).sub.n Ar.sup.3 (I)wherein, n represents a whole number; R.sup.1, R.sup.1, R.sup.3 and R.sup.4 groups are independently selected from H, branched aliphatic, straight chain aliphatic, branched silane or straight chain silane; Ar.sup.1 and Ar.sup.3 are aromatic radicals having a substituent in at least one position adjacent to a site of attachment of the C.dbd.C double bond and having at least one electron withdrawing or electron donating substituent in at least one of the remaining positions; Ar.sup.2 is an aromatic radical having a substituent in at least one position adjacent to a site of attachment of the C.dbd.C double bond; with the proviso that the substituent in at least one position adjacent to the site of attachment of the C.dbd.C double bond and R.sup.1, R.sup.2, R.sup.3 and R.sup.4 groups are sufficiently large to cause Ar.sup.1, Ar.sup.2 and Ar.sup.Type: GrantFiled: September 10, 1996Date of Patent: March 24, 1998Assignee: The University of ToledoInventors: James E. Gano, Padmanabhan Sekher
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Patent number: 5721082Abstract: There are provided an electrophotographic photoreceptor having a photosensitive layer containing at least one amine compound represented by formula (1): ##STR1## wherein Ar.sub.1 represents a substituted or unsubstituted aryl group; Ar.sub.2 represents a substituted or unsubstituted phenylene group, a substituted or unsubstituted naphthylene group, a substituted or unsubstituted biphenylene group or a substituted or unsubstituted anthrylene group; R.sub.1 represents a hydrogen atom, a lower alkyl group or a lower alkoxy group; X represents a hydrogen atom, a substituted or unsubstituted alkyl group, or a substituted or unsubstituted aryl group; and Y represents a substituted or unsubstituted aryl group, or a group represented by formula (2) or (3) described in the specification.Type: GrantFiled: April 27, 1995Date of Patent: February 24, 1998Assignee: Hodogaya Chemical Co., Ltd.Inventors: Atsushi Takesue, Mitsutoshi Anzai, Takanobu Watanabe, Chieko Inayoshi
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Patent number: 5707768Abstract: A diamine compound of the following formula (1): ##STR1## wherein R.sub.1 is a hydrogen atom, a lower alkyl group or a lower alkoxy group, each of A.sub.1, A.sub.2 and A.sub.3 which are independent of one another, is a substituted or unsubstituted alkyl group, a substituted or unsubstituted aryl group, or a group of the following formula (2): ##STR2## wherein R.sub.1 is as defined above, and X is a substituted or unsubstituted arylene group or a substituted or unsubstituted heterocyclic bivalent group.Type: GrantFiled: November 28, 1995Date of Patent: January 13, 1998Assignee: Hodogaya Chemical Co., Ltd.Inventors: Mitsutoshi Anzai, Atsushi Takesue, Takanobu Watanabe, Chieko Inayoshi
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Patent number: 5683842Abstract: Photoconductive imaging members comprised of unsymmetrical dimeric perylene as a charge generator, wherein said perylene is of the following formula ##STR1## wherein R is hydrogen, alkyl, cycloalkyl, substituted alkyl, aryl, substituted aryl, aralkyl or substituted aralkyl group, and X-Y is an unsymmetrical bridging moiety of alkylene, substituted alkylene, arylene, substituted arylene, aralkylene or substituted aralkylene.Type: GrantFiled: February 26, 1997Date of Patent: November 4, 1997Assignee: Xerox CorporationInventors: James M. Duff, C. Geoffrey Allen, Ah-Mee Hor, Gordon K. Hamer
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Patent number: 5587263Abstract: A triarylamine compound useful as a charge transport material of an electrophotographic photoreceptor, which represented by formula (I) ##STR1## wherein Ar.sub.1 and Ar.sub.2 each represents a phenyl group or a condensed ring group.Type: GrantFiled: May 18, 1995Date of Patent: December 24, 1996Assignee: Fuji Xerox Co., Ltd.Inventors: Katsumi Nukada, Akira Imai, Ryosaku Igarashi
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Patent number: 5576132Abstract: An electrophotographic photoconductor comprises an electroconductive substrate and a photoconductive layer formed thereon comprising as an effective component at least one pyrenylamine derivative of formula (I): ##STR1## wherein R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.5, W, j, k, l, m and n are specifically defined in the specification. Furthermore, a novel pyrenylamine derivative for use in the above electrophotographic photoconductor, an aldehyde compound, which is an intermediate for producing the pyrenylamine derivative, and methods of preparing the pyrenylamine derivative and the aldehyde compound are disclosed.Type: GrantFiled: April 24, 1995Date of Patent: November 19, 1996Assignee: Ricoh Company, Ltd.Inventors: Chiaki Tanaka, Masaomi Sasaki, Tamotsu Aruga, Tomoyuki Shimada, Hiroshi Adachi
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Patent number: 5492784Abstract: A positively-chargeable single-layered type organic electrophotographic photoconductor composed of an electroconductive support and an organic single-layered photoconductive layer containing a charge generating material, an organic positive hole transporting material and an organic acceptor compound which are dispersed in a matrix binder agent, with the relationship of the oxidation potential (E.sub.ox) of the charge generating material.ltoreq.the oxidation potential (E.sub.ox) of the organic positive hole transporting material being satisfied.Type: GrantFiled: August 6, 1993Date of Patent: February 20, 1996Assignee: Ricoh Company, Ltd.Inventors: Masao Yoshikawa, Masayuki Shoshi, Tetsuro Suzuki, Masakatsu Shimoda, Kaoru Teramura, Megumi Kawahara, Akio Kojima, Masaomi Sasaki, Masafumi Ohta
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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: 5411828Abstract: An electrophotographic photosensitive member is disclosed which has a photosensitive layer on a conductive support. The photosensitive layer contains an azo pigment of Formula (1):Ar--(--N.dbd.N--Cp).sub.n.Also, disclosed are an electrophotographic apparatus, a device unit, and a facsimile machine using the electrophotographic photosensitive member.Type: GrantFiled: February 4, 1993Date of Patent: May 2, 1995Assignee: Canon Kabushiki KaishaInventor: Yoshio Kashizaki
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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: 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: 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: 5278013Abstract: There is disclosed an electrophotographic photosensitive member having a photosensitive layer containing a disazo pigment represented by the following general formula (1) or (2); ##STR1## The photosensitive member has excellent durability and high sensitivity.Type: GrantFiled: November 21, 1991Date of Patent: January 11, 1994Assignee: Canon Kabushiki KaishaInventors: Yoshio Kashizaki, Koichi Suzuki
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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: 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: 5250378Abstract: The disclosed invention relates to novel charge-transfer complexes comprising fullerenes and electron donating components, and to photoconductive compositions containing fullerenes. These compositions are useful in electrostatic imaging.Type: GrantFiled: September 30, 1992Date of Patent: October 5, 1993Assignee: E. I. Du Pont de Nemours and CompanyInventor: Ying Wang
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Patent number: 5246805Abstract: An electrophotographic photosensitive member comprises an electroconductive support and a photosensitive layer formed thereon. The photosensitive layer contains a compound represented by the general formula: ##STR1## The compound provide an electrophotographic photosensitive member which has excellent sensitivity and potential stability.Type: GrantFiled: May 22, 1991Date of Patent: September 21, 1993Assignee: Canon Kabushiki KaishaInventors: Hajime Miyazaki, Toshihiro Kikuchi, Yoshio Kashizaki
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Patent number: 5192632Abstract: An electrophotographic photosensitive member has an electroconductive support and a photosensitive layer formed thereon. The photosensitive layer contains a compound represented by the general formula (1) below: ##STR1## wherein Z.sub.1 and Z.sub.2 are each independently a hydrogen atom, an alkyl group, a halogen atom, an alkoxy group, a nitro group, a cyano group, or a trifluoromethyl group; A.sub.1 and A.sub.2 are each a coupler residue having a phenolic hydroxyl group, which may be the same or different; and n is an integer of 1 or 2.Type: GrantFiled: July 29, 1991Date of Patent: March 9, 1993Assignee: Canon Kabushiki KaishaInventors: Satomi Ohmura, Yoshio Kashizaki
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Patent number: 5178980Abstract: An imaging member comprised of a supporting substrate, a photogenerator layer optionally dispersed in a resin binder, and a charge transport layer comprised of a fullerene or fullerenes optionally dispersed in a resin binder.Type: GrantFiled: September 3, 1991Date of Patent: January 12, 1993Assignee: Xerox CorporationInventors: Joseph Mort, Mary A. Machonkin
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Patent number: 5171373Abstract: It has been found that fullerenes exhibit photoelectronic behavior such as photoconductivity or photovoltaic properties. Such behavior allows the fabrication of a variety of devices, such as solar cells and the use of various light-induced processes, such as the generation of a current by illumination of appropriate fullerene interfaces.Type: GrantFiled: July 30, 1991Date of Patent: December 15, 1992Assignee: AT&T Bell LaboratoriesInventors: Arthur F. Hebard, Barry Miller, Joseph M. Rosamilia, William L. Wilson
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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: 5166016Abstract: A photoconductive imaging member comprised of a supporting substrate and thereover a charge transfer complex comprised of a polysilylene donor polymer and an electron acceptor.Type: GrantFiled: August 1, 1991Date of Patent: November 24, 1992Assignee: Xerox CorporationInventors: Santokh S. Badesha, Michael M. Shahin, Damodar M. Pai
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Patent number: 5158850Abstract: An electrophotographic photoconductor comprising an electroconductive support and a photoconductive layer formed thereon comprising as an effective component at least one polyether compound represented by formula (I): ##STR1## wherein Ar represents a phenylene group or a biphenylene group; R.sup.1 and R.sup.2 each represent an alkyl group which may have a substituent, or an aryl group which may have a substituent; and n is an integer of 1 to 4. Furthermore, charge transporting material comprising the above polyether compound, polyether compounds having formula (II) for use in the electrophotographic photoconductor and a method of preparing the same are disclosed, ##STR2## wherein m is an integer of 1 or 2.Type: GrantFiled: December 13, 1990Date of Patent: October 27, 1992Assignee: Ricoh Company, Ltd.Inventors: Masaomi Sasaki, Tamotsu Aruga, Tomoyuki Shimada
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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