Polycyclo Ring System Patents (Class 430/71)
  • Patent number: 10266325
    Abstract: 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: Grant
    Filed: June 7, 2016
    Date of Patent: April 23, 2019
    Assignee: International Business Machines Corporation
    Inventors: Brandon M. Kobilka, Joseph Kuczynski, Jacob T. Porter, Jason T. Wertz
  • Patent number: 10216124
    Abstract: 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: Grant
    Filed: October 7, 2016
    Date of Patent: February 26, 2019
    Assignee: XEROX CORPORATION
    Inventors: Qi Zhang, Nan-Xing Hu, Suxia Yang, Sandra J. Gardner, Edward G. Zwartz, Yu Qi
  • Patent number: 9977359
    Abstract: 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: Grant
    Filed: February 1, 2017
    Date of Patent: May 22, 2018
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Takashi Koyanagi, Masaki Yamada, Shohei Urushihara, Hideya Arimura
  • Publication number: 20140356772
    Abstract: 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: Application
    Filed: June 3, 2013
    Publication date: December 4, 2014
    Applicant: Xerox Corporation
    Inventor: Jin Wu
  • Publication number: 20140255837
    Abstract: 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: Application
    Filed: February 26, 2014
    Publication date: September 11, 2014
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Koichi Nakata, Shinji Takagi, Nobuo Kosaka, Koichi Suzuki
  • Publication number: 20140255836
    Abstract: 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: Application
    Filed: February 26, 2014
    Publication date: September 11, 2014
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Koichi Nakata, Shinji Takagi, Nobuo Kosaka, Koichi Suzuki
  • Publication number: 20130330665
    Abstract: 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: Application
    Filed: June 6, 2012
    Publication date: December 12, 2013
    Applicant: Xerox Corporation
    Inventors: 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.
  • Patent number: 8461291
    Abstract: 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: Grant
    Filed: December 17, 2008
    Date of Patent: June 11, 2013
    Assignee: E I du Pont de Nemours and Company
    Inventors: Hong Meng, Dengfu Wang
  • Patent number: 8441003
    Abstract: 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: Grant
    Filed: June 24, 2008
    Date of Patent: May 14, 2013
    Assignee: Showa Denko K.K.
    Inventor: Yoshiaki Takahashi
  • Patent number: 8304514
    Abstract: 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: Grant
    Filed: January 26, 2011
    Date of Patent: November 6, 2012
    Assignee: National Taiwan University of Science & Technology
    Inventor: Der-Jang Liaw
  • Patent number: 8227157
    Abstract: 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: Grant
    Filed: June 17, 2009
    Date of Patent: July 24, 2012
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Koichi Toriyama, Mami Adachi
  • Patent number: 8142967
    Abstract: 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: Grant
    Filed: March 18, 2009
    Date of Patent: March 27, 2012
    Assignee: Xerox Corporation
    Inventors: Yuhua Tong, Edward F. Grabowski, Donald J. Goodman, Kock-Yee Law, Robert C. U. Yu
  • Publication number: 20120017994
    Abstract: 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: Application
    Filed: January 26, 2011
    Publication date: January 26, 2012
    Inventor: Der-Jang LIAW
  • Patent number: 8034519
    Abstract: 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: Grant
    Filed: June 16, 2008
    Date of Patent: October 11, 2011
    Assignee: Konica Minolta Business Technologies, Inc.
    Inventors: Tomoko Sakimura, Toyoko Shibata, Shinichi Hamaguchi
  • Patent number: 7985521
    Abstract: 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: Grant
    Filed: May 30, 2008
    Date of Patent: July 26, 2011
    Assignee: Xerox Corporation
    Inventor: Jin Wu
  • Publication number: 20100055589
    Abstract: 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: Application
    Filed: August 26, 2008
    Publication date: March 4, 2010
    Applicant: XEROX CORPORATION
    Inventors: Yu QI, Nan-Xing HU, Qi ZHANG
  • Publication number: 20080166645
    Abstract: 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: Application
    Filed: October 16, 2007
    Publication date: July 10, 2008
    Applicant: KONICA MINOLTA BUSINESS TECHNOLOGIES, INC.
    Inventors: Toyoko SHIBATA, Tomoko SAKIMURA
  • Patent number: 7344811
    Abstract: 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: Grant
    Filed: October 28, 2004
    Date of Patent: March 18, 2008
    Assignee: Samsung Electronic Co., Ltd.
    Inventors: Asta Michaleviciute, Gintaras Buika, Juozas V. Grazulevicius, Zaimantas Peleckas, Edmundas Montrimas, Jonas Sidaravicius
  • Patent number: 6953957
    Abstract: 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: Grant
    Filed: October 15, 2003
    Date of Patent: October 11, 2005
    Assignees: Merck Patent GmbH, Siemens AG
    Inventors: Iain McCulloch, Marcus Thompson, Mark Giles, Martin Heeney, Steven Tierney, Henning Rost
  • Patent number: 6165661
    Abstract: 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: Grant
    Filed: May 21, 1999
    Date of Patent: December 26, 2000
    Assignee: Xerox Corporation
    Inventors: Cheng-Kuo Hsiao, Ah-Mee Hor, James M. Duff, Giuseppa Baranyi, C. Geoffrey Allen
  • Patent number: 5891594
    Abstract: 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: Grant
    Filed: January 13, 1997
    Date of Patent: April 6, 1999
    Assignee: Xerox Corporation
    Inventors: Huoy-Jen Yuh, John S. Chambers
  • Patent number: 5876891
    Abstract: 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: Grant
    Filed: May 26, 1995
    Date of Patent: March 2, 1999
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Akio Takimoto, Hirofumi Wakemoto, Eiichiro Tanaka, Masanori Watanabe, Junko Asayama, Hisahito Ogawa, Shigehiro Sato, Fumiko Yokotani
  • Patent number: 5759725
    Abstract: Disclosed is a photoconductor comprises, a material containing fullerenes and their derivatives arranged in an amorphous structure.
    Type: Grant
    Filed: November 30, 1995
    Date of Patent: June 2, 1998
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Akiko Hirao, Hirohisa Miyamoto, Hideyuki Nishizawa, Masahiro Hosoya, Masami Sugiuchi
  • Patent number: 5731890
    Abstract: 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: Grant
    Filed: September 10, 1996
    Date of Patent: March 24, 1998
    Assignee: The University of Toledo
    Inventors: James E. Gano, Padmanabhan Sekher
  • Patent number: 5731078
    Abstract: 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: Grant
    Filed: May 30, 1995
    Date of Patent: March 24, 1998
    Assignee: Xerox Corporation
    Inventors: Bing R. Hsieh, Joan R. Ewing, Damodar M. Pai, Kathyrn A. Wallace, Jerry H. Taylor, Francois Soos, Joseph R. Weber
  • Patent number: 5721082
    Abstract: 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: Grant
    Filed: April 27, 1995
    Date of Patent: February 24, 1998
    Assignee: Hodogaya Chemical Co., Ltd.
    Inventors: Atsushi Takesue, Mitsutoshi Anzai, Takanobu Watanabe, Chieko Inayoshi
  • Patent number: 5707768
    Abstract: 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: Grant
    Filed: November 28, 1995
    Date of Patent: January 13, 1998
    Assignee: Hodogaya Chemical Co., Ltd.
    Inventors: Mitsutoshi Anzai, Atsushi Takesue, Takanobu Watanabe, Chieko Inayoshi
  • Patent number: 5683842
    Abstract: 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: Grant
    Filed: February 26, 1997
    Date of Patent: November 4, 1997
    Assignee: Xerox Corporation
    Inventors: James M. Duff, C. Geoffrey Allen, Ah-Mee Hor, Gordon K. Hamer
  • Patent number: 5587263
    Abstract: 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: Grant
    Filed: May 18, 1995
    Date of Patent: December 24, 1996
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Katsumi Nukada, Akira Imai, Ryosaku Igarashi
  • Patent number: 5576132
    Abstract: 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: Grant
    Filed: April 24, 1995
    Date of Patent: November 19, 1996
    Assignee: Ricoh Company, Ltd.
    Inventors: Chiaki Tanaka, Masaomi Sasaki, Tamotsu Aruga, Tomoyuki Shimada, Hiroshi Adachi
  • Patent number: 5492784
    Abstract: 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: Grant
    Filed: August 6, 1993
    Date of Patent: February 20, 1996
    Assignee: Ricoh Company, Ltd.
    Inventors: Masao Yoshikawa, Masayuki Shoshi, Tetsuro Suzuki, Masakatsu Shimoda, Kaoru Teramura, Megumi Kawahara, Akio Kojima, Masaomi Sasaki, Masafumi Ohta
  • Patent number: 5436100
    Abstract: 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: Grant
    Filed: April 7, 1994
    Date of Patent: July 25, 1995
    Assignee: Ricoh Company, Ltd.
    Inventors: Tomoyuki Shimada, Masaomi Sasaki, Tamotsu Aruga, Hiroshi Adachi
  • Patent number: 5411828
    Abstract: 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: Grant
    Filed: February 4, 1993
    Date of Patent: May 2, 1995
    Assignee: Canon Kabushiki Kaisha
    Inventor: Yoshio Kashizaki
  • Patent number: 5389479
    Abstract: 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: Grant
    Filed: August 24, 1993
    Date of Patent: February 14, 1995
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Kiyofumi Morimoto, Akihiro Kondo, Satoshi Machino, Kazuhiro Emoto, Akiko Masuda
  • Patent number: 5376486
    Abstract: 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: Grant
    Filed: June 14, 1993
    Date of Patent: December 27, 1994
    Assignee: Mitsubishi Paper Mills Limited
    Inventors: Akira Itoh, Hideki Nagamura
  • Patent number: 5370954
    Abstract: 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: Grant
    Filed: April 16, 1993
    Date of Patent: December 6, 1994
    Assignee: Ricoh Company, Ltd.
    Inventors: Katsuichi Ohta, Masaomi Sasaki, Mitsuru Hashimoto, Kazuya Ishida, Tomoyuki Shimada
  • Patent number: 5283144
    Abstract: 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: Grant
    Filed: September 2, 1992
    Date of Patent: February 1, 1994
    Assignee: Xerox Corporation
    Inventors: Anthony T. Ward, George Liebermann, Ah-Mee Hor, Giuseppa Baranyi, Donald J. Teney
  • Patent number: 5278013
    Abstract: 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: Grant
    Filed: November 21, 1991
    Date of Patent: January 11, 1994
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yoshio Kashizaki, Koichi Suzuki
  • Patent number: 5268246
    Abstract: 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: Grant
    Filed: April 9, 1991
    Date of Patent: December 7, 1993
    Assignee: Ricoh Company, Ltd.
    Inventors: Tamotsu Aruga, Masaomi Sasaki, Tomoyuki Shimada, Hiroshi Adachi
  • Patent number: 5250377
    Abstract: 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: Grant
    Filed: February 21, 1992
    Date of Patent: October 5, 1993
    Assignee: Ricoh Company, Ltd.
    Inventors: Tomoyuki Shimada, Masaomi Sasaki, Mitsuru Hashimoto
  • Patent number: 5250378
    Abstract: 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: Grant
    Filed: September 30, 1992
    Date of Patent: October 5, 1993
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Ying Wang
  • Patent number: 5246805
    Abstract: 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: Grant
    Filed: May 22, 1991
    Date of Patent: September 21, 1993
    Assignee: Canon Kabushiki Kaisha
    Inventors: Hajime Miyazaki, Toshihiro Kikuchi, Yoshio Kashizaki
  • Patent number: 5192632
    Abstract: 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: Grant
    Filed: July 29, 1991
    Date of Patent: March 9, 1993
    Assignee: Canon Kabushiki Kaisha
    Inventors: Satomi Ohmura, Yoshio Kashizaki
  • Patent number: 5178980
    Abstract: 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: Grant
    Filed: September 3, 1991
    Date of Patent: January 12, 1993
    Assignee: Xerox Corporation
    Inventors: Joseph Mort, Mary A. Machonkin
  • Patent number: 5171373
    Abstract: 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: Grant
    Filed: July 30, 1991
    Date of Patent: December 15, 1992
    Assignee: AT&T Bell Laboratories
    Inventors: Arthur F. Hebard, Barry Miller, Joseph M. Rosamilia, William L. Wilson
  • Patent number: 5168025
    Abstract: 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: Grant
    Filed: September 11, 1991
    Date of Patent: December 1, 1992
    Assignee: Mitsubishi Kasei Corporation
    Inventors: Hitoshi Ono, Atsuo Saita
  • Patent number: 5166016
    Abstract: 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: Grant
    Filed: August 1, 1991
    Date of Patent: November 24, 1992
    Assignee: Xerox Corporation
    Inventors: Santokh S. Badesha, Michael M. Shahin, Damodar M. Pai
  • Patent number: 5158850
    Abstract: 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: Grant
    Filed: December 13, 1990
    Date of Patent: October 27, 1992
    Assignee: Ricoh Company, Ltd.
    Inventors: Masaomi Sasaki, Tamotsu Aruga, Tomoyuki Shimada
  • Patent number: 5137794
    Abstract: 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: Grant
    Filed: June 12, 1991
    Date of Patent: August 11, 1992
    Assignee: Canon Kabushiki Kaisha
    Inventor: Toshihiro Kikuchi
  • Patent number: 5130218
    Abstract: An electrophotographic photoreceptor which employs a photosensitive layer including a binder resin and an organic pigment as a charge generating material which has been subjected to an acid pasting treatment. The sulfur content of the organic pigment is maintained at 500 ppm or less to achieve a stable high chargeability and low dark decay coefficient.
    Type: Grant
    Filed: July 20, 1990
    Date of Patent: July 14, 1992
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Motoko Yokokawa, Seiji Ashiya