Hydrazone Containing Patents (Class 430/58.4)
  • Patent number: 9243322
    Abstract: Methods for applying a coating to a substrate in rolled form, the substrate including a first edge face and a second edge face opposite the first edge face, the substrate further having a first major surface and a second major surface opposite the first major surface, the first and second major surfaces extending between the first edge face and the second edge face, the methods including applying a coating to at least one edge face and optionally at least a portion of one or both major surfaces of the substrate in rolled form. Articles in rolled form prepared according to the foregoing methods are also disclosed.
    Type: Grant
    Filed: October 26, 2012
    Date of Patent: January 26, 2016
    Assignee: 3M INNOVATIVE PROPERTIES COMPANY
    Inventors: Bill H. Dodge, David K. Cinader, Jr., MaThazin Aung, Artin Margharian
  • Patent number: 9184317
    Abstract: Photovoltaic cells, as well as related systems, methods, modules, and components, are disclosed.
    Type: Grant
    Filed: April 2, 2008
    Date of Patent: November 10, 2015
    Assignee: MERCK PATENT GMBH
    Inventors: Christoph Brabec, Jens Hauch, Russell Gaudiana, Andrea Welte, Jin-An He, Eitan C. Zeira
  • Patent number: 9052645
    Abstract: An intermediate transfer member that includes polyarylatecarbonate, an optional polysiloxane, and an optional conductive filler component.
    Type: Grant
    Filed: April 13, 2013
    Date of Patent: June 9, 2015
    Assignee: Xerox Corporation
    Inventor: Jin Wu
  • Publication number: 20150064614
    Abstract: A photoreceptor includes a substrate a charge generating layer disposed on the substrate and a charge transport layer disposed on the charge generating layer, the charge transport layer includes a hole transport molecule, a fluorinated diol, and a leveling agent, the charge transport layer is substantially free of a polymer binder and catalyst, and has a post-discharge voltage of less than about 10 volts.
    Type: Application
    Filed: September 4, 2013
    Publication date: March 5, 2015
    Applicant: XEROX CORPORATION
    Inventors: Gregory McGuire, Sarah J. Vella, Adrien P. Cote, Yvan Gagnon, Brynn Dooley
  • Patent number: 8609310
    Abstract: An electrophotographic photoreceptor has at least an electroconductive substrate, and a photosensitive layer formed on or above the electroconductive substrate, wherein an outermost layer of the photoreceptor is a cured membrane of a composition containing at least one compound (a) having in a single molecule thereof a charge transporting skeleton and a chain polymerizable functional group, and at least one thermopolymerizable or photopolymerizable silicone polymeric radical polymerization initiator (b).
    Type: Grant
    Filed: August 14, 2009
    Date of Patent: December 17, 2013
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Hitoshi Takimoto, Akira Hirano, Takatsugu Doi, Wataru Yamada, Katsumi Nukada
  • Patent number: 8404411
    Abstract: An electrophotographic photoreceptor having high sensitivity and hardly affected by the transfer in an electrophotographic process is provided. The electrophotographic photoreceptor includes an undercoat layer containing metal oxide particles and a binder resin and a photosensitive layer disposed on the undercoat layer, wherein the metal oxide particles have a volume average particle diameter of 0.1 ?m or less and a 90% cumulative particle diameter of 0.3 ?m or less which are measured by a dynamic light-scattering method in a liquid of the undercoat layer dispersed in a solvent mixture of methanol and 1-propanol at a weight ratio of 7:3, and the photosensitive layer contains a binder resin having an ester bond.
    Type: Grant
    Filed: May 18, 2007
    Date of Patent: March 26, 2013
    Assignee: Mitsubishi Chemical Corporation
    Inventors: Teruyuki Mitsumori, Kozo Ishio, Hiroe Fuchigami, Hiroaki Takamura, Yasunori Kawai
  • Patent number: 8404413
    Abstract: Present embodiments are directed to the preparation of curl-free flexible imaging members used in electrostatography. More particularly, the embodiments pertain to a structurally simplified flexible electrophotographic imaging member, including the incorporation of a plasticizer or a blend of plasticizers in the imaging layer(s) to effect imaging layer(s) stress relieving outcome for curl control without the need of an anticurl back coating, and methods for making and using the imaging member.
    Type: Grant
    Filed: May 18, 2010
    Date of Patent: March 26, 2013
    Assignee: Xerox Corporation
    Inventors: Robert C. U. Yu, Yuhua Tong
  • Publication number: 20130022902
    Abstract: An electrophotographic photoreceptor including an electroconductive substrate; a charge generation layer located overlying the electroconductive substrate; a charge transport layer located overlying the charge generation layer; and an outermost layer located overlying the charge transport layer. The charge transport layer includes a positive hole transport material having the following formula (1): wherein each of R1 to R26 independently represents a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, or an alkoxyl group having 1 to 4 carbon atoms, and a compound having the following formula (2): wherein each of R27 and R28 independently represents a substituted or unsubstituted alkyl group, or a substituted or unsubstituted aryl group.
    Type: Application
    Filed: July 13, 2012
    Publication date: January 24, 2013
    Inventors: Keisuke Shimoyama, Hideo Nakamori, Noboru Toriu, Mitsuaki Hirose, Tomoharu Asano
  • Patent number: 8211603
    Abstract: An electrophotographic imaging member includes a substrate, a photogenerating layer, and an optional overcoating layer, where the photogenerating layer includes a chemically functionalized carbon nanotube material.
    Type: Grant
    Filed: August 8, 2006
    Date of Patent: July 3, 2012
    Assignee: Xerox Corporation
    Inventors: Timothy P. Bender, James D. Mayo
  • Publication number: 20110195354
    Abstract: The present invention provides an electrophotographic photoreceptor including a photosensitive layer on a conductive substrate, an outermost layer of the electrophotographic photoreceptor including a cured film of a composition which includes at least one charge transporting compound (a) having a charge transporting skeleton and at least two structural units represented by R—O—CO—CR??CH—R? in the same molecule, and at least one polycarbonate resin; a ratio (IA/IC) of an absorption peak intensity (IA) resulting from stretching vibration of a carbonyl group originating from the structural unit represented by R—O—CO—CR??CH—R? of the charge transporting compound (a) to an absorption peak intensity (IC) resulting from stretching vibration of a carbonyl group originating from the polycarbonate resin in an IR absorption spectrum of the outermost layer being from about 0.5 to about 10, and a width at half maximum of the absorption peak of the absorption peak intensity (IA) being about 25 cm?1 or more.
    Type: Application
    Filed: September 8, 2010
    Publication date: August 11, 2011
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Katsumi NUKADA, Wataru YAMADA, Tsuyoshi MIYAMOTO, Kenya SONOBE, Takatsugu DOI
  • Publication number: 20110091799
    Abstract: In an electrophotographic photoreceptor having a photosensitive layer on an electroconductive substrate, the photosensitive layer is a positive-charging laminate comprising at least a charge transport layer and a charge generating layer laminated in that order, with the charge generating layer containing at least a resin binder, a charge generating agent, a space filler and an electron transport agent, while the charge transport layer contains at least, as a resin binder, polystyrene and a hole transport agent, and mineral oil of the charge transport layer is in an amount of 1% by mass or less of an amount of polystyrene. Thus, a highly durable and economic positive-charging multilayer electrophotographic photoreceptor and a manufacturing method therefor may be achieved.
    Type: Application
    Filed: May 28, 2009
    Publication date: April 21, 2011
    Inventors: Yoichi Nakamura, Seizo Kitagawa, Hiroshi Emori, Yasushi Tanaka, Hiroyuki Ichiyanagi
  • Publication number: 20100233601
    Abstract: An electrophotographic photoreceptor has at least an electroconductive substrate, and a photosensitive layer formed on or above the electroconductive substrate, wherein an outermost layer of the photoreceptor is a cured membrane of a composition containing at least one compound (a) having in a single molecule thereof a charge transporting skeleton and a chain polymerizable functional group, and at least one thermopolymerizable or photopolymerizable silicone polymeric radical polymerization initiator (b).
    Type: Application
    Filed: August 14, 2009
    Publication date: September 16, 2010
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Hitoshi TAKIMOTO, Akira HIRANO, Takatsugu DOI, Wataru YAMADA, Katsumi NUKADA
  • Patent number: 7674565
    Abstract: A photoconductive having an overcoat layer that includes a cured or substantially crosslinked product of at least a melamine-formaldehyde resin and a charge transport compound, and an optional phenol compound.
    Type: Grant
    Filed: July 25, 2006
    Date of Patent: March 9, 2010
    Assignee: Xerox Corporation
    Inventors: Yu Qi, Nan-Xing Hu
  • Patent number: 7635548
    Abstract: An electrophotographic imaging member includes a substrate, a photogenerating layer, and an optional overcoating layer, where the photogenerating layer includes a self-assembled carbon nanotube material having pendant charge transport materials.
    Type: Grant
    Filed: August 8, 2006
    Date of Patent: December 22, 2009
    Assignee: Xerox Corporation
    Inventor: Timothy P. Bender
  • Patent number: 7553592
    Abstract: An electrophotographic imaging member includes at least one layer including a hole transport material and a strong electron acceptor material, such as an electrophotographic imaging member including a substrate, a charge generating layer, a hole transport layer, and an optional overcoating layer, wherein at least one layer of the electrophotographic imaging member comprises a strong electron acceptor material.
    Type: Grant
    Filed: June 5, 2006
    Date of Patent: June 30, 2009
    Assignee: Xerox Corporation
    Inventors: Hany Aziz, Gregory McGuire, Johann Junginger
  • Patent number: 7547842
    Abstract: Disclosed herein is an organic electronic device comprising a charge transport layer comprising a host charge transport material and a guest charge transport material, wherein the guest material is not homogeneously distributed in the host material and is spatially doped within the host material. The charge transport layer may be either a hole or electron transport layer and is useful in a variety of organic electronic devices.
    Type: Grant
    Filed: October 17, 2007
    Date of Patent: June 16, 2009
    Inventor: Ying Wang
  • Patent number: 7534541
    Abstract: Improved organophotoreceptor comprises an electrically conductive substrate and a photoconductive element on the electrically conductive substrate, the photoconductive element comprising: (a) a charge transport material having the formula: where n is an integer between 1 and 10, inclusive; R1 comprises a functional group selected from the group consisting of a reactive ring group, an ethylenically unsaturated group, a reactive polar group, a hydrazone group, and an azine group; R2, R3, R4, R5, and R6 comprise, each independently, H, an alkyl group, an alkenyl group, an alkynyl group, an aromatic group, a heterocyclic group, or a part of a ring group; X is a bond or a linking group; and Q is O, S, or NR where R is H, an alkyl group, an acyl group, an alkenyl group, an alkynyl group, a heterocyclic group, or an aromatic group; and (b) a charge generating compound.
    Type: Grant
    Filed: January 27, 2005
    Date of Patent: May 19, 2009
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Maryte Daskeviciene, Vytautas Getautis, Tadeus Lozovski, Edmundas Montrimas
  • Patent number: 7510809
    Abstract: An electrophotographic photoreceptor including a charge generating layer and a charge transfer layer accumulated on a support member, the charge transfer layer including at least two layers of a support side layer and a surface side layer, wherein the support side layer contains A mol/cm3 of charge mol/cm3 of charge transfer material having a dipolar moment of not more than 0.75 and inorganic particles having a number average primary particle diameter of 3-150 nm, wherein A and B satisfies relations of (1) and (2), 9.0×10?4>A>3.0×10?4??(1) 8.0×10?4>B>2.0×10?5??(2).
    Type: Grant
    Filed: November 21, 2005
    Date of Patent: March 31, 2009
    Assignee: Konica Minolta Business Technologies, Inc.
    Inventors: Chigusa Yamane, Keiichi Inagaki, Kunihiro Ogura
  • Patent number: 7452641
    Abstract: Charge transport compounds are described that have a multiple number of hydrazone-bridged (N,N-disubstituted)arylamine groups connected by a central bridging group. Examples of charge transport compounds of this invention are those having the following generic formula: (R-Q)n-Y where R is an (N,N-disubstituted)arylamine group; Q comprises an aliphatic or aromatic hydrazone linking group; n is 2; and Y comprises a bridging group comprising an aryl group having the formula —Ar1-G-Ar2— where Ar1 and Ar2 are, each independently, an arylene group and G comprises a bond, O, S, —SO2—, an imine group, an alkylene group, or an aromatic group.
    Type: Grant
    Filed: January 31, 2005
    Date of Patent: November 18, 2008
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Nusrallah Jubran, Hwan Koo Lee, Kam W. Law, Edita Jasiukaityte, Jolita Ostrauskaite, Juozas V. Grazulevicius, Jonas Sidaravicius
  • Patent number: 7432028
    Abstract: This invention relates to a novel organophotoreceptor that includes: (a) a charge transport composition comprising molecules having the formula where n is an average of a distribution of integers generally between 2 and 50,000, and in which n is at least 2; R1, R2, R3, and R4 comprise, each independently, H, an alkyl group, an alkenyl group, a heterocyclic group, or an aromatic group; X comprises an (N,N-disubstituted)arylamine group; and Y is a bridging group; (b) a charge generating compound; and (c) an electrically conductive substrate over which the charge transport composition and the charge generating compound are located.
    Type: Grant
    Filed: February 4, 2004
    Date of Patent: October 7, 2008
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Vytautas Getautis, Tadas Malinauskas, Juozas V. Grazulevicius, Valentas Gaidelis, Vygintas Jankauskas, Zbigniew Tokarski, Nusrallah Jubran, Kam W. Law
  • Patent number: 7427460
    Abstract: Improved organophotoreceptor comprises an electrically conductive substrate and a photoconductive element on the electrically conductive substrate, the photoconductive element comprising: (a) a charge transport material having the formula where Ar is an aryl group; X comprises a bond or a linking group; R1, R2, and R3 each comprise H, a carboxyl, an amino group, a halogen, an alkyl group, an acyl group, an alkoxy group, an alkylsulfanyl group, an alkenyl group, an alkynyl group, a heterocyclic group, an aromatic group, or a part of a ring group; R4 comprises H, an alkyl group, an alkenyl group, an alkynyl group, an aromatic group, or a heterocyclic group; and R5, R6, R7, and R8 each comprise an alkyl group, an alkenyl group, an alkynyl group, an aromatic group, a heterocyclic group, or a part of a ring group; and (b) a charge generating compound. Corresponding electrophotographic apparatuses and imaging methods are described.
    Type: Grant
    Filed: July 30, 2004
    Date of Patent: September 23, 2008
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Ruta Budreckiene, Gintaras Buika, Vygintas Jankauskas, Juozas V. Grazulevicius, Jonas Sidaravicius, Nusrallah Jubran, Zbigniew Tokarski
  • Patent number: 7358015
    Abstract: Plasticizers in a charge transfer layer to reduce surface cracking and crazing having a hydrocarbon chain, attached to a hindered phenol containing triazole or triazine moiety. Plasticizers found useful for this application can be used in a concentration (by weight of the charge transfer layer) in the order of magnitude of 10% to about 25%. The plasticizer additive may also be used in combination with other known plasticizers such as those containing a 2-ethylhexyl group.
    Type: Grant
    Filed: June 3, 2005
    Date of Patent: April 15, 2008
    Assignee: Lexmark International, Inc.
    Inventors: Mark Thomas Bellino, Catherine Mailhé Randolph, Kasturi Rangan Srinivasan
  • Patent number: 7358014
    Abstract: A novel charge transport compound, a novel process using that novel compound and an organophotoreceptor includes: (a) a novel charge transport compound having the formula where R1 and R2 are selected so that R1 and R2 form, with the included nitrogen atom, a group selected from the group consisting of heterocyclic rings, aromatic rings, and dinaphthylamine; or R1 comprises an aryl group and R2 comprises a group selected from the group consisting of sulfolanyl, pyrrolyl, pyrazolyl, benzotriazolyl, stilbenyl, tetrazolyl, and group A, wherein group A is represented by the structure or R1 comprises hydrogen, alkyl group, aryl group and R2 comprises sulfonylphenyl. R3 is hydrogen, alkyl group, aryl group, a heterocyclic group or a hydrocarbon group; and Q is a 3-carbazole group; (b) a charge generating compound; and (c) an electrically conductive substrate.
    Type: Grant
    Filed: August 9, 2002
    Date of Patent: April 15, 2008
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Kam W. Law, Nusrallah Jubran, Zbigniew Tokarski, Alan R. Katritzky, Ritu Jain, Rexiat Maimait
  • Publication number: 20080038652
    Abstract: An electrophotographic imaging member includes a substrate, a photogenerating layer, and an optional overcoating layer, where the photogenerating layer includes a self-assembled carbon nanotube material having pendant charge transport materials.
    Type: Application
    Filed: August 8, 2006
    Publication date: February 14, 2008
    Applicant: XEROX CORPORATION
    Inventor: Timothy P. BENDER
  • Patent number: 7326506
    Abstract: Improved organophotoreceptor comprises an electrically conductive substrate and a photoconductive element on the electrically conductive substrate, the photoconductive element comprising: (a) a charge transport material having the formula where Z1 and Z2 comprise, each independently, a bond, a vinyl group, a —CR1?N—NR2— group, or a —CR3?N—N?CR4— group; Y1 and Y2 comprise, each independently, an aromatic group; X1 and X2 are, each independently, a linking group; W1 and W2 are, each independently, a —(CH2)n— group or a —(CH2)n-1—C(?O)— group, where n is an integer between 1 and 10, inclusive; Q1 and Q2 are, each independently, O, S, or NR; and R1, R2, R3, R4, R, R?, and R? comprise, each independently, H, an alkyl group, an alkenyl group, an alkynyl group, an acyl group, a heterocyclic group, or an aromatic group; and (b) a charge generating compound. Corresponding electrophotographic apparatuses and imaging methods are described.
    Type: Grant
    Filed: May 28, 2004
    Date of Patent: February 5, 2008
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Nusrallah Jubran, Zbigniew Tokarski, Vytautas Getautis, Juozas V. Grazulevicius, Vygintas Jankauskas, Ingrida Paulauskaite, Jurate Simokaitiene, Albina Stanisauskaite, Valentas Gaidelis
  • Publication number: 20080026308
    Abstract: A photoconductive having an overcoat layer that includes a cured or substantially crosslinked product of at least a melamine-formaldehyde resin and a charge transport compound, and an optional phenol compound.
    Type: Application
    Filed: July 25, 2006
    Publication date: January 31, 2008
    Applicant: Xerox Corporation
    Inventors: Yu Qi, Nan-Xing Hu
  • Publication number: 20070281226
    Abstract: An electrophotographic imaging member includes at least one layer including a hole transport material and a strong electron acceptor material, such as an electro photographic imaging member including a substrate, a charge generating layer, a hole transport layer, and an optional overcoating layer, wherein at least one layer of the electrophotographic imaging member comprises a strong electron acceptor material.
    Type: Application
    Filed: June 5, 2006
    Publication date: December 6, 2007
    Applicant: XEROX CORPORATION
    Inventors: Hany AZIZ, Gregory McGuire, Johann Junginger
  • Patent number: 7300731
    Abstract: The present invention relates to new a charge transport layer that includes first charge transport material which is spatially doped with a second charge transport material. The charge transport layer may either be a hole or electron transport layer and is useful in organic electronic devices.
    Type: Grant
    Filed: August 10, 2004
    Date of Patent: November 27, 2007
    Assignee: E.I. du Pont de Nemours and Company
    Inventor: Ying Wang
  • Patent number: 7291428
    Abstract: An electrophotographic imaging member having a charge generating layer and a charge transport layer overlayed thereon is provided. The charge transport layer has a lower surface and an upper surface, wherein the lower surface is in contiguous contact with the charge generating layer. The charge transport layer comprises a film forming polymer binder and a charge transport compound molecularly dispersed or dissolved therein to form a solid solution. The concentration of the charge transport compound in the charge transport layer decreases from the lower surface to the upper surface. In such a construction, the resulting charge transport layer exhibits enhanced cracking suppression, improved wear resistance, excellent imaging member electrical performance, and improved copy print out quality.
    Type: Grant
    Filed: December 15, 2006
    Date of Patent: November 6, 2007
    Assignee: Xerox Corporation
    Inventors: Satchidanand Mishra, Anthony M. Horgan, Robert C. U. Yu, Dasarao K. Murti, Suresh K. Ahuja
  • Patent number: 7195850
    Abstract: A photoconductor having a charge generation layer and a charge transport layer, the charge transport layer having hydrazone or aryl amine charge transport molecules and also having as room light protective additives acetosol yellow 5GLS and tetraphenylcyclopentadienone or 9-fluorenone. Preferably the amount of the acetosol yellow is 2 to 4 percent by weight of the weight of the charge transfer layer and the ratio of weight between the acetosol yellow and the dienone or fluorenone is in the range of 1:1 to 1:3.
    Type: Grant
    Filed: March 17, 2004
    Date of Patent: March 27, 2007
    Assignee: Lexmark International, Inc.
    Inventor: Kasturi Rangan Srinivasan
  • Patent number: 7153574
    Abstract: A composition includes a metal oxide particle, which can optionally be surface treated by a silane coupling agent, and an electron acceptor surface grafted to the metal oxide particle.
    Type: Grant
    Filed: July 16, 2004
    Date of Patent: December 26, 2006
    Assignees: Xerox Corporation, Fuji Xerox Co., Ltd.
    Inventors: Yu Qi, Nan-Xing Hu, Ah-Mee Hor, Hidemi Nukada, Hirofumi Nakamura
  • Patent number: 7125633
    Abstract: An imaging member having a charge transport layer with multiple regions or layers is provided. The charge transport layer includes at least two charge transport layers coated from solutions of different components and concentrations, wherein the second (top) transport layer comprises a lower concentration of different charge transport compound than the first (bottom) charge transport layer. The charge transport compound included in the second (top) charge transport layer is a high mobility hole transport compound. The charge transport compound in each layer is dissolved or molecularly dispersed in an electrically inactive film forming polymer to form a solid solution. In such a construction, the resulting dual charge transport layer exhibits enhanced cracking suppression, improves wear resistance, provides excellent imaging member electrical performance, and delivers improved print quality.
    Type: Grant
    Filed: December 12, 2003
    Date of Patent: October 24, 2006
    Assignee: Xerox Corporation
    Inventors: Satchidanand Mishra, Houy Jen Yuh, Anthony M. Horgan, Markus R. Silvestri, Robert C. Yu, Yuh Tong, Dale Renfer, Kenny-tuan Dinh, Geoff Foley, Jack Yanus, Timothy Fuller
  • Patent number: 7112391
    Abstract: Charge transport compounds are described that have a multiple number of hydrazone-bridged (N,N-disubstituted)arylamine groups connected by a central bridging group. Examples of charge transport compounds of this invention are those having the following generic formula: (R—Q)n-Y where R is an (N,N-disubstituted)arylamine group; Q comprises an aromatic hydrazone linking group; Y comprises a bridging group between R—Q—groups; and n is an integer between 2 and 6. An organic photoreceptor includes (a) that compound and (b) a charge generating compound; and (c) an electrically conductive substrate.
    Type: Grant
    Filed: November 22, 2004
    Date of Patent: September 26, 2006
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Nusrallah Jubran, Hwan Koo Lee, Kam W. Law
  • Patent number: 7083884
    Abstract: Improved organophotoreceptor comprises an electrically conductive substrate and a photoconductive element on the electrically conductive substrate, the photoconductive element comprising: (a) a charge transport material having the formula where R1 and R2 are, independently, H, an alkyl group, an alkaryl group, or an aryl group; X is a linking group having the formula —(CH2)m—, branched or linear, where m is an integer between 1 and 20, inclusive, and one or more of the methylene groups is optionally replaced by O, S, C?O, O?S?O, a heterocyclic group, an aromatic group, urethane, urea, an ester group, a NR3 group, a CHR4 group, or a CR5R6 group where R3, R4, R5, and R6 are, independently, H, hydroxyl group, thiol group, an alkyl group, an alkaryl group, a heterocyclic group, or an aryl group; E is an epoxy group; and Z is a phenothiazine group, a phenoxazine group, a phenoxathiin group, a dibenzo(1,4)dioxin group, a thianthrene group, or a phenazine group; and (b) a charge generating compound.
    Type: Grant
    Filed: October 28, 2003
    Date of Patent: August 1, 2006
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Nusrallah Jubran, Zbigniew Tokarski, Juozas V. Grazulevicius, Vytautas Getautis, Jolita Ostrauskaite, Jurate Simokaitiene, Edmundas Montrimas
  • Patent number: 7037632
    Abstract: Improved organophotoreceptor comprises an electrically conductive substrate and a photoconductive element on the electrically conductive substrate, the photoconductive element comprising: (a) a charge transport material having the formula where the formula is described in the especification; and ?(b) a charge generating compound.
    Type: Grant
    Filed: September 25, 2003
    Date of Patent: May 2, 2006
    Assignee: Samsung Electronics Co. Ltd.
    Inventors: Nusrallah Jubran, Zbigniew Tokarski, Kam W. Law
  • Patent number: 7033714
    Abstract: An imaging member having a charge transport layer is provided. The charge transport layer includes a plurality of charge transport layers coated from solutions of similar or different compositions or concentrations, wherein the upper or additional transport layer(s) comprise a lower concentration of charge transport compound than the first (bottom) charge transport layer. The charge transport compound included in the first (bottom) charge transport layer may either be the same or different from that included in the additional charge transport layers. The charge transport compound in one or more of the layers is dissolved or molecularly dispersed in an electrically inactive polymer material to form a solid solution. In such a construction, the resulting charge transport layer exhibits enhanced cracking suppression, improves wear resistance, provides excellent imaging member electrical performance, and delivers improved print quality.
    Type: Grant
    Filed: December 16, 2003
    Date of Patent: April 25, 2006
    Assignee: Xerox Corporation
    Inventors: Anthony M. Horgan, Robert C Yu, Satchidanand Mishra, Richard L. Post, Edward F. Grabowski, Kathleen M. Carmichael, John R. Lambie
  • Patent number: 7011917
    Abstract: Improved organophotoreceptor comprises an electrically conductive substrate and a photoconductive element on the electrically conductive substrate, the photoconductive element comprising: (a) a charge transport material having the formula ?where n is an integer between 2 and 6, inclusive; R1 and R2 are, independently, H, halogen, carboxyl, hydroxyl, thiol, cyano, nitro, aldehyde group, ketone group, an ether group, an ester group, a carbonyl group, an alkyl group, an alkaryl group, or an aryl group; X is a linking group having the formula —(CH2)m—, branched or linear, where m is an integer between 0 and 20, inclusive, and one or more of the methylene groups can be optionally replaced by O, S, C?O, O?S?O, a heterocyclic group, an aromatic group, urethane, urea, an ester group, a NR3 group, a CHR4 group, or a CR5R6 group where R3, R4, R5, and R6 are, independently, H, an alkyl group, an alkaryl group, a heterocyclic group, or an aryl group; Y comprises a bond, C, N, O, S, a branched or linear —(CH2)p— gr
    Type: Grant
    Filed: September 25, 2003
    Date of Patent: March 14, 2006
    Assignee: Samsung Electronics Co. Ltd.
    Inventors: Nusrallah Jubran, Zbigniew Tokarski, Kam W. Law
  • Patent number: 7005222
    Abstract: An imaging member having a charge transport layer with multiple regions is provided. The charge transport layer includes a plurality of charge transport layers coated from solutions of similar or different compositions or concentrations, wherein at least the top or uppermost transport layer comprises a lower concentration of charge transport compound than the first (bottom) charge transport layer. The charge transport compound included in the first (bottom) charge transport layer may either be of the same or different compounds from that included in the top or additional charge transport layer(s). The charge transport compound present in each layer may be dissolved or molecularly dispersed in an electrically inactive polymer material to form a solid solution. In such a construction, the resulting charge transport layer exhibits enhanced cracking suppression, improves wear resistance, provides excellent imaging member electrical performance, and delivers improved print quality.
    Type: Grant
    Filed: December 16, 2003
    Date of Patent: February 28, 2006
    Assignee: Xerox Corporation
    Inventors: Anthony M. Horgan, Satchidanand Mishra, Robert C. Yu, Richard L. Post, Edward F. Grabowski, Kathleen M. Carmichael, John R. Lambie
  • Patent number: 6946225
    Abstract: 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: Grant
    Filed: July 22, 2002
    Date of Patent: September 20, 2005
    Assignee: Eastman Kodak Company
    Inventors: Albert V. Buettner, Dennis R. Fronheiser, Anne F. Lairmore, David S. Weiss, Jeffrey R. Murray, Marie B. O'Regan
  • Patent number: 6905804
    Abstract: This invention relates to a novel organophotoreceptor that includes: (a) a charge transport material comprising a fluorenone hydrazone having a) at least two fluorenone alkylsulfonylphenylhydrazone groups, b) at least two fluorenone pyrrolylhydrazone groups, c) at least two fluorenone benzotriazolylhydrazone groups, d) at least two fluorenone sulfolanylhydrazone groups, e) at least two fluorenone pyrazolylhydrazone groups, f) at least two fluorenone naphthylhydrazone groups, g) at least two fluorenone tetrazolylhydrazone groups, h) at least two fluorenone stilbenylhydrazone groups, or i) at least two fluorenone (9H-fluoren-9-ylidene)benzylhydrazone groups. Some of these fluoreneones may be represented by the formula where n is an integer between 2 and 6, inclusive; R1 is hydrogen, an alkyl group, or an aryl group; R2 is an alkylsulfonylphenyl or one of its derivatives; X is a linking group.
    Type: Grant
    Filed: January 22, 2003
    Date of Patent: June 14, 2005
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Kam W. Law, Nusrallah Jubran, Zbigniew Tokarski, Alan R. Katritzky, Ritu Jain, Rexiat Maimait
  • Patent number: 6887634
    Abstract: Charge transport compounds are described that have a multiple number of hydrazone-bridged (N,N-disubstituted)arylamine groups connected by a central bridging group. Examples of charge transport compounds of this invention are those having the following generic formula: (R-Q)n-Y where R is an (N,N-disubstituted)arylamine group; Q comprises an aromatic hydrazone linking group; Y comprises a bridging group between R-Q- groups; and n is an integer between 2 and 6. An organic photoreceptor includes (a) that compound and (b) a charge generating compound; and (c) an electrically conductive substrate.
    Type: Grant
    Filed: December 30, 2003
    Date of Patent: May 3, 2005
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Nusrallah Jubran, Hwan Koo Lee, Kam W. Law
  • Patent number: 6835514
    Abstract: Improved organophotoreceptor include: (a) a charge transport compound having the formula where R1 has a structure of: in which Ar is selected form the group consisting of; R4 is a hydrogen or an aromatic group and R2 and R3 are, independently, an (N,N-disubstituted) arylamine group; (b) a charge generating compound; and (c) an electrically conductive substrate. Additional improved charge transport compounds have the formula where R1 has a structure of and R2 is a julolidene group or a carbazole group.
    Type: Grant
    Filed: March 6, 2003
    Date of Patent: December 28, 2004
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Nusrallah Jubran, Zbigniew Tokarski, Kam W. Law
  • Patent number: 6787276
    Abstract: Charge transport layers comprise a charge transport compound and binder including styrene-acrylic resin. Dual layer photoconductors comprise a substrate, a charge transport layer as described, and a charge generation layer.
    Type: Grant
    Filed: June 20, 2002
    Date of Patent: September 7, 2004
    Assignee: Lexmark International, Inc.
    Inventors: David Glenn Black, Ronald Harold Levin, Dat Quoc Nguyen, Bradford Lee Taylor, Vincent Wen-Hwa Ting, Franklin Dilworth Zartman
  • Publication number: 20040126685
    Abstract: An imaging member having a charge transport layer with multiple regions is provided. The charge transport layer includes a plurality of charge transport layers coated from solutions of similar or different compositions or concentrations, wherein at least the top or uppermost transport layer comprises a lower concentration of charge transport compound than the first (bottom) charge transport layer. The charge transport compound included in the first (bottom) charge transport layer may either be of the same or different compounds from that included in the top or additional charge transport layer(s). The charge transport compound present in each layer may be dissolved or molecularly dispersed in an electrically inactive polymer material to form a solid solution. In such a construction, the resulting charge transport layer exhibits enhanced cracking suppression, improves wear resistance, provides excellent imaging member electrical performance, and delivers improved print quality.
    Type: Application
    Filed: December 16, 2003
    Publication date: July 1, 2004
    Applicant: Xerox Corporation
    Inventors: Anthony M. Horgan, Satchidanand Mishra, Robert C.U. Yu, Richard L. Post, Edward F. Grabowski, Kathleen M. Carmichael, John R. Lambie
  • Publication number: 20040126684
    Abstract: An imaging member having a charge transport layer is provided. The charge transport layer includes a plurality of charge transport layers coated from solutions of similar or different compositions or concentrations, wherein the upper or additional transport layer(s) comprise a lower concentration of charge transport compound than the first (bottom) charge transport layer. The charge transport compound included in the first (bottom) charge transport layer may either be the same or different from that included in the additional charge transport layers. The charge transport compound in one or more of the layers is dissolved or molecularly dispersed in an electrically inactive polymer material to form a solid solution. In such a construction, the resulting charge transport layer exhibits enhanced cracking suppression, improves wear resistance, provides excellent imaging member electrical performance, and delivers improved print quality.
    Type: Application
    Filed: December 16, 2003
    Publication date: July 1, 2004
    Applicant: Xerox Corporation
    Inventors: Anthony M. Horgan, Robert C.U. Yu, Satchidanand Mishra, Richard L. Post, Edward F. Grabowski, Kathleen M. Carmichael, John R. Lambie
  • Patent number: 6749978
    Abstract: 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: Grant
    Filed: May 30, 2003
    Date of Patent: June 15, 2004
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Nusrallah Jubran, Zbigniew Tokarski, Kam Law, Vytautas Getautis, Jonas Sidaravicius, Osvaldas Paliulis, Valentas Gaidelis, Vygintas Jankauskas
  • Patent number: 6670085
    Abstract: Charge transport compounds are described that have a multiple number of hydrazone-bridged heterocyclic groups (especially julolidine, carbazole and/or triarylmethane groups) connected by a central bridging group.
    Type: Grant
    Filed: September 24, 2001
    Date of Patent: December 30, 2003
    Assignee: Samsung Electronics Co. Ltd
    Inventors: Nusrallah Jubran, Hwan Koo Lee, Kam W. Law
  • Publication number: 20030235770
    Abstract: Charge transport layers comprise a charge transport compound and binder including styrene-acrylic resin. Dual layer photoconductors comprise a substrate, a charge transport layer as described, and a charge generation layer.
    Type: Application
    Filed: June 20, 2002
    Publication date: December 25, 2003
    Inventors: David Glenn Black, Ronald Harold Levin, Dat Quoc Nguyen, Bradford Lee Taylor, Vincent Wen-Hwa Ting, Franklin Dilworth Zartman
  • Publication number: 20030219662
    Abstract: 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: Application
    Filed: May 30, 2003
    Publication date: November 27, 2003
    Applicant: SAMSUNG Electronics Co. Ltd.
    Inventors: Nusrallah Jubran, Zbigniew Tokarski, Kam Law, Vytautas Getautis, Jonas Sidaravicius, Osvaldas Paliulis, Valentas Gaidelis, Vygintas Jankauskas
  • Patent number: 6645686
    Abstract: 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: Grant
    Filed: July 23, 2002
    Date of Patent: November 11, 2003
    Assignee: Xerox Corporation
    Inventors: Min-Hong Fu, Colleen A. Helbig, Kent J. Evans, Kathleen M. Carmichael, June E. Schneider, David M. Skinner, Alfred H. Willnow