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| Number | Title | Issue Date |
| 8076047 | Electrophotographic photoreceptor and image formation device provided with the same An electrophotographic photoreceptor comprising at least a photosensitive layer formed by laminating a charge generation layer containing a charge generation material and a charge transport layer containing a charge transport material in this order, on a conductive ... | 12/13/2011 |
| 7947417 | Processes for the preparation of high sensitivity titanium phthalocyanines photogenerating pigments A process for preparing a high sensitivity titanyl phthalocyanine (TiOPc) pigment includes dissolving a Type I TiOPc in a suitable solvent, precipitating an intermediate TiOPc pigment by quenching the solution comprising the dissolved Type I TiOPc in a solvent syste... | 05/24/2011 |
| 7923186 | Imaging member exhibiting lateral charge migration resistance 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 ... | 04/12/2011 |
| 7824830 | Coating liquid and electrophotographic photoreceptor prepared using the coating liquid A coating liquid including an N-alkoxymethylated nylon and a solvent, wherein the N-alkoxymethylated nylon includes one or more ions in an amount of from 200 to 500 ppm based on a weight of the N-alkoxymethylated nylon or one or more alkylamines in an amount of from... | 11/02/2010 |
| 7670739 | Single layered photoconductors A photoconductor that includes a supporting substrate, and an active layer in contact with the substrate, and which layer contains at least one photogenerating pigment, at least one charge transport component, and a mixture of a metal oxide and a chelating agent of ... | 03/02/2010 |
| 7655371 | Photoconductive imaging members A photoconductive imaging member including at least a substrate, an optional thick undercoat layer, a charge generating layer comprising a high sensitivity pigment and a low sensitivity pigment, and a charge transport layer. ... | 02/02/2010 |
| 7553593 | Titanyl phthalocyanine photoconductors A photoconductor containing an optional supporting substrate, a photogenerating layer, and at least one charge transport layer, and wherein the photogenerating layer contains a titanyl phthalocyanine prepared, for example, by dissolving a Type I titanyl phthalocyani... | 06/30/2009 |
| 7550239 | Alkyltriol titanyl phthalocyanine photoconductors A photoconductor containing an optional supporting substrate, a photogenerating layer, and at least one charge transport layer, and wherein the photogenerating layer contains an alkyltriol, such as glycerol, and a photogenerating pigment, such as a Type V titanyl ph... | 06/23/2009 |
| 7537872 | Image bearing member with charge blocking layer and moire prevention layer, and image forming apparatus and process cartridge using the same An image bearing member including an electroconductive substrate, a charge blocking layer disposed overlying the electroconductive substrate, a moire prevention layer disposed overlying the charge blocking layer, and a photosensitive layer disposed overlying the moi... | 05/26/2009 |
| 7449270 | Electrophotographic photoreceptor containing naphthalenetetracarboxylic acid diimide derivatives as electron transport materials in charge generating layer and the electrophotographic imaging apparatus using the photoreceptor A two-layered electrophotographic photoreceptor is formed. The two-layered electrophotographic photoreceptor includes an electrically conductive substrate and a charge generating layer and a charge transporting layer form on the electrically conductive substrate, wh... | 11/11/2008 |
| 7419751 | Titanylphthalocyanine crystal and method of producing the titanylphthalocyanine crystal, and electrophotographic photoreceptor, method, apparatus and process cartridge using the titanylphthalocyanine crystal A titanylphthalocyanine crystal having an X-ray diffraction spectrum having plural diffraction peaks and a primary particle diameter not greater than 0.2 μm, wherein a maximum diffraction peak is observed at a Bragg (2θ) angle of 27.2±0.2°; main peaks are observ... | 09/02/2008 |
| 7399564 | Electrophotographic photoconductor An electrophotographic photoconductor where generation of cracks, crystallization of a photosensitive layer, and the like occur infrequently by sticking of finger oil. An electrophotographic photoconductor includes a conductive substrate on which a photosensitive la... | 07/15/2008 |
| 7378204 | Photoconductive member A photoconductive imaging member containing a photogenerating layer, and a charge transport layer, and wherein the charge transport layer is comprised of an arylamine containing a moiety that minimizes oxidation. ... | 05/27/2008 |
| 7371491 | Electrophotographic photoreceptor, method for manufacturing the electrophotographic photoreceptor, and image forming apparatus and process cartridge using the electrophotographic photoreceptor A photoreceptor including an electroconductive substrate; and a charge blocking layer; a moiré preventing layer; and a photosensitive layer, which are overlaid overlying the substrate in this order, wherein the photosensitive layer includes a titanyl phthalocyanine... | 05/13/2008 |
| 7371490 | Photoconductor, image forming apparatus, image forming process, and process cartridge The object of the present invention is to provide a photoconductor that is highly sensitive, stable in image quality under repeated usages, and affords prolonged life. In order attain the object, a photoconductor is provided that comprises a charge generating... | 05/13/2008 |
| 7371497 | Electrophotographic image forming method An electrophotographic image forming apparatus comprising: an electrophotographic photoreceptor comprising: an electroconductive substrate; a charge generation layer; and ... | 05/13/2008 |
| 7354686 | Electrophotographic photoconductor and process for manufacturing the same, and image forming apparatus and process cartridge containing the same An electrophotographic photoconductor includes an electroconductive substrate, a charge generation layer, and a charge transport layer formed by using a halogen-free solvent, arranged in this order, in which the charge generation layer contains a charge generation m... | 04/08/2008 |
| 7270926 | Imaging member A process for preparing a charge generating layer comprising dispersing photoconductive phthalocyanine particles in a polymer matrix, the matrix comprising a polymeric film-forming reaction product of vinyl chloride, vinyl acetate, maleic acid, and hydroxyalkyl acry... | 09/18/2007 |
| 7252781 | Solutions of polymer semiconductors The present invention relates to a process for producing particle-free solutions of polymeric semiconductors and to their use for producing layers of polymeric semiconductors in polymeric organic light-emitting diodes (PLEDs), organic integrated circuits (O-ICs), or... | 08/07/2007 |
| 7211700 | Non-halogenated phenyl substituted phenols, antimicrobial compositions containing the same, and methods of using the same A antimicrobial compound, compositions containing the same, and method of using the same for reducing the presence of microorganism on a substrate or in a fluid environment comprising an antimicrobial effective carrier and at least one antimicrobial compounds includ... | 05/01/2007 |
| 7186490 | Photosensitive material, electrophotographic photoreceptor using the material, and electrophotographic image forming method and apparatus using the photoreceptor A titanyl phthalocyanine crystal having an X-ray diffraction spectrum having a plurality of diffraction peaks in which a maximum diffraction peak is observed at a Bragg (2 θ) angle of 27.2°±0.2° and a diffraction peak is observed at a lowest Bragg (2θ) angle of... | 03/06/2007 |
| 7163772 | Organic electrophotographic photo-receptor The present invention provides an organic electrophotographic photo-receptor having a conductive substrate and a photosensitive layer laid on the conductive substrate, wherein the photosensitive layer contains at least one μ-oxo bridged heterometal compound as a ch... | 01/16/2007 |
| 7129012 | Electrophotographic photosensitive member, process cartridge, and electrophotographic apparatus An electrophotographic photosensitive member which has VA, VB, and d satisfying an expression (|−600−VA|−|−600−VB|)/d=0.13 and VC satisfying an expression −5=−(−450−VC)=2 provides an... | 10/31/2006 |
| 7065316 | Cleaning unit, process cartridge, image forming apparatus, and toner A cleaning unit is equipped with a cleaning blade that is in contact with a surface of a photosensitive drum and cleans the surface. A peak temperature of a loss tangent (tan δ) is in a range of 2° C. to −30° C. when a sine-wave vibration of 10 Hz is applied to... | 06/20/2006 |
| 7049038 | Photoconductive imaging members having pyrolized polyacrylonitrile hole blocking layer A photoconductive imaging member comprised of an optional supporting substrate, a hole blocking layer thereover, a photogenerating layer, and a charge transport layer, and wherein the hole blocking layer is comprised of a pyrolyzed polyacrylonitrile. ... | 05/23/2006 |
| 7041419 | Organic photoreceptor unit The present invention relates to an organic photoreceptor unit that has a conductive base unit, a charge generating layer formed on the conductive base unit, a first charge transport layer that is formed on the charge generating layer and contains a first bonding re... | 05/09/2006 |
| 7037631 | Photoconductive imaging members A photoconductive imaging member including a supporting substrate, a hole blocking layer thereover, a crosslinked photogenerating layer and a charge transport layer, and wherein the photogenerating layer includes a photogenerating component and a vinyl chloride, all... | 05/02/2006 |
| 7033716 | Two-stage milling process for preparing cocrystals of titanyl fluorophthalocyanine and titanyl phthalocyanine, and electrophotographic element containing same An amorphous mixture consisting essentially of TiOFPc and TiOPc and containing more than 75 weight percent of substantially chlorine-free TiOPc is produced by forming a mixture of crude crystalline TiOFPc and crude crystalline, substantially chlorine-free TiOPc that... | 04/25/2006 |
| 7033715 | Uniform cocrystals of titanyl fluorophthalocyanine and titanyl phthalocyanine formed in trichloroethane, and charge generating layer containing same In a process for forming a nanoparticulate crystalline titanium phthalocyanine pigment composition, a titanium phthalocyanine pigment is contacted with substantially pure 1,1,2-trichloroethane (TCE) under conditions effective to convert the titanium phthalocyanine p... | 04/25/2006 |
| 7029810 | Electrophotographic image forming apparatus An electrophotographic image forming apparatus comprising: an electrophotographic photoreceptor comprising: an electroconductive substrate; a charge generation layer; and ... | 04/18/2006 |
| 7018758 | Photoconductive imaging members A photoconductive imaging member comprised of a hole blocking layer, a photogenerating layer, and a charge transport layer, and wherein the hole blocking layer is generated from a solution of a metal alkyloxide, an amino alkylsilane, an aminoalkoxy silane or an amin... | 03/28/2006 |
| 7018757 | Photoconductor materials based on complex of charge generating material An electrophotographic article having a complex of charge generating material and at least one transfer material selected from the group consisting of electron transfer material and hole transfer material is formed by admixing the charge generating material, at leas... | 03/28/2006 |
| 7011919 | Self-dispersing titanyl phthalocyanine pigment compositions and electrophotographic charge generation layers containing same In a process for forming a self-dispersing crystalline phthalocyanine pigment composition of monodisperse nanoparticles, a mixture containing titanyl fluorophthalocyanines, unsubstituted titanyl phthalocyanine, and an organic monomeric dispersant but substantially f... | 03/14/2006 |
| 7008742 | Heat-induced formation of co-crystalline composition containing titanyl phthalocyanine and titanyl fluorophthalocyanine A process for forming a cocrystalline mixture of titanyl phthalocyanine (TiOPc) and titanyl fluorophthalocyanine (TiOFPc) includes: dry milling a mixture of crude TiOPc and crude TiOFPc, thereby forming an amorphous pigment mixture of TiOPc and TiOFPc; and heating t... | 03/07/2006 |
| 6984479 | Electrophotographic photoconductor and manufacturing method therefore An electrophotographic photoconductor includes a photosensitive layer on a conductive substrate. The photosensitive layer contains a pigment that consists of crystallites composed of molecules having a titanylphthalocyanine structure, wherein a crystallite diameter ... | 01/10/2006 |
| 6968335 | Method and system for parallel processing of database queries A system and methods for parallel processing of queries to one or more databases are described herein. One or more databases may be distributed among a subset of slave nodes of a global-results processing matrix. A query to the database may be generated using a quer... | 11/22/2005 |
| 6949139 | Process for forming cocrystals containing chlorine-free titanyl phthalocyanines and low concentration of titanyl fluorophthalocyanine using organic milling aid In a process for forming an amorphous pigment mixture consisting essentially of TiOPc and TiOFPc and containing more than about 75 weight percent of TiOPc, a mixture of crude crystalline TiOPc and TiOFPc pigments in a weight ratio of at least 75:25 TiOPc:TiOFPc is c... | 09/27/2005 |
| 6913863 | Photoconductive imaging members A photoconductive imaging member including a hole blocking layer, a photogenerating layer, and a charge transport layer, and wherein the hole blocking layer contains, for example, a metal oxide; and a mixture of a phenolic compound and a phenolic resin, and wherein ... | 07/05/2005 |
| 6902857 | Method for forming electrophotographic image and electrographic device A method for forming an electrophotographic image and a device for forming an image on a transfer material by the steps for charging, exposing, developing and transferring, and recovering the toner remained untransferred in the step for cleaning by recovering, where... | 06/07/2005 |
| 6858364 | Electrophotographic photoreceptors The subject application provides for a composition crystal comprising a phthalocyanine compound and an asymmetric phthalocyanine wherein a part of benzene ring in phthalocyanine structure is substituted with naphthalene ring, pyridine or pyrazine ring, is stable aga... | 02/22/2005 |
