Patents by Inventor Ah-Mee Hor

Ah-Mee Hor has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Image-forming apparatus and process cartridge
    Publication number: 20060013615
    Abstract: The invention provides an image-forming apparatus, having an electrophotographic photoreceptor, a charging unit, a light-exposure unit, a development unit, a transfer unit, and a controller that controls the traveling speed of the peripheral surface of the electrophotographic photoreceptor and that thus makes a period from charging to development variable, wherein: the electrophotographic photoreceptor has an undercoat layer and a photosensitive layer; and the undercoat layer contains metal oxide fine particles with an acceptor compound added thereto; and an image is formed by charging, light exposure, development and transfer while causing the peripheral surface of the electrophotographic photoreceptor to travel in a predetermined direction; and a process cartridge that is detachable from the image forming apparatus.
    Type: Application
    Filed: March 17, 2005
    Publication date: January 19, 2006
    Applicants: FUJI XEROX CO., LTD., XEROS CORPORATION
    Inventors: Hidemi Nukada, Hirofumi Nakamura, Taketoshi Hoshizaki, Yu Qi, Ah-Mee Hor, Nan-Xing Hu
  • Image forming apparatus and process cartridge
    Publication number: 20060013616
    Abstract: An image forming apparatus comprising an electrophotographic photoreceptor, a charging unit, an exposure unit, a development unit, and a transfer unit, wherein the image forming apparatus conducts charging, exposure, development, and transfer while moving a circumferential surface of the electrophotographic photoreceptor in a predetermined direction, the image forming apparatus further comprises a controlling unit which controls a moving velocity of the circumferential surface of the electrophotographic photoreceptor so that a time required for processes from charging to development is changeable, the electrophotographic photoreceptor includes an undercoat layer and a photosensitive layer, and the undercoat layer includes a metal oxide particle and an acceptor compound having a group capable of reacting with the metal oxide particle.
    Type: Application
    Filed: March 18, 2005
    Publication date: January 19, 2006
    Inventors: Hidemi Nukada, Hirofumi Nakamura, Taketoshi Hoshizaki, Yu Qi, Nan-Xing Hu, Ah-Mee Hor
  • Surface grafted metal oxide particles and compositions comprising the same
    Publication number: 20060014020
    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: Application
    Filed: July 16, 2004
    Publication date: January 19, 2006
    Applicant: XEROX CORPORATION
    Inventors: Yu Qi, Nan-Xing Hu, Ah-Mee Hor, Hidemi Nukada, Hirofumi Nakamura
  • Electrophotographic photoreceptor, electrophotographic cartridge and electrophotographic apparatus
    Publication number: 20060014092
    Abstract: An electrophotographic photoreceptor including at least an undercoat layer and a photosensitive layer on a conductive substrate, in which the undercoat layer includes metal oxide fine particles to which an electron acceptor compound is attached.
    Type: Application
    Filed: March 18, 2005
    Publication date: January 19, 2006
    Inventors: Hidemi Nukada, Hirofumi Nakamura, Taketoshi Hoshizaki, Yu Qi, Nan-Xing Hu, Ah-Mee Hor
  • Electrophotographic photoreceptor, process cartridge and electrophotographic apparatus
    Publication number: 20060014090
    Abstract: A multilayer electrophotographic photoreceptor, comprising an electroconductive substrate, and at least an interlayer and a charge-generating layer formed on the substrate, wherein the interlayer comprises fine metal oxide particles and the interlayer and the charge-generating layer comprise anthiaquinone derivative(s), and wherein the interlayer has a volume resistivity in a range of 1.0×108 ?·cm to 1.0×1013 ?·cm when an electric field of 106 V/m is applied thereto at 28° C. and 85% relative humidity. A process cartridge and an image forming apparatus using the multilayer electrophotographic photoreceptor are also provided.
    Type: Application
    Filed: March 18, 2005
    Publication date: January 19, 2006
    Applicants: Fuji Xerox Co., Ltd., Xerox Corporation
    Inventors: Shigeaki Shiino, Makoto Takemoto, Makoto Kusayanagi, Koichi Yasaku, Hirokazu Sakashita, Makoto Nishimura, Yu Qi, Nan-Xing Hu, Ah-Mee Hor
  • Electrophotographic photoreceptor, process cartridge and electrophotographic apparatus
    Publication number: 20060014091
    Abstract: An electrophotographic photoreceptor comprising: an electrophotographic photoreceptor having at least an undercoat layer and a photosensitive layer formed on a conductive substrate, wherein the undercoat layer contains metal oxide fine particles and an electron acceptor compound having a group reactive with the metal oxide fine particles. A process cartridge and an electrophotographic apparatus using the electrophotographic photoreceptor are also provided.
    Type: Application
    Filed: March 17, 2005
    Publication date: January 19, 2006
    Applicants: Fuji Xerox Co., Ltd., Xerox Corporation
    Inventors: Hidemi Nukada, Hirofumi Nakamura, Yu Ql, Nan-Xing Hu, Ah-Mee Hor, Koji Bando
  • Photoconductive imaging members
    Publication number: 20050233231
    Abstract: A photoconductive imaging member comprised of a substrate, a photogenerating layer, and thereover a charge transport layer comprised of a charge transport component or components, a polymer binder and metal oxide particles, wherein said metal oxide particles contain or are attached with or to a silane or a siloxane, or alternatively a polytetrafluoroethylene.
    Type: Application
    Filed: April 14, 2004
    Publication date: October 20, 2005
    Inventors: Yu Qi, Nan-Xing Hu, Ah-Mee Hor, Cheng-Kuo Hsiao, Yvan Gagnon, John Graham, Liang-Bih Lin, Cuong Vong
  • Photoconductive members
    Publication number: 20050233235
    Abstract: A photoconductive member containing, for example, a substrate, a photogenerating layer, a charge transport layer and an overcoat layer wherein the overcoat layer is comprised of a crosslinked siloxane composite containing a caprolactone-siloxane.
    Type: Application
    Filed: April 14, 2004
    Publication date: October 20, 2005
    Inventors: Yu Qi, Nan-Xing Hu, Ah-Mee Hor, Cheng-Kuo Hsiao, Gregory McGuire, H. Goodbrand, Cuong Vong
  • Imaging members
    Patent number: 6946227
    Abstract: A photoconductive imaging member containers of a supporting substrate, and thereover a single layer comprised of a mixture of a photogenerator component, a charge transport component, an electron transport component, and a polymer binder, and wherein the photogenerating component is a pigment.
    Type: Grant
    Filed: November 20, 2002
    Date of Patent: September 20, 2005
    Assignee: Xerox Corporation
    Inventors: Liang-Bih Lin, Richard H. Nealey, Ah-Mee Hor, James M. Duff, Timothy P. Bender, Andrew R. Melnyk, Andronique Ioannidis, Harold F. Hammond, Linda L. Ferrarese, Cindy C. Chen, James M. Markovics, Kenny-Tuan T. Dinh
  • Photoconductive imaging members
    Publication number: 20050175913
    Abstract: 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 at least one copolymer of an aminoalkyltrialkoxysilane and a silane.
    Type: Application
    Filed: February 9, 2004
    Publication date: August 11, 2005
    Inventors: Timothy Bender, John Graham, Ah-Mee Hor, Johann Junginger
  • Photosensitive member having nano-size filler
    Patent number: 6911288
    Abstract: An imaging member having a substrate, a charge transport layer having charge transport materials dispersed therein, and an overcoat layer, wherein at least one of the charge transport layer and the overcoat layer comprise nano-size fillers having a particle size of from about 1 to about 250 nanometers.
    Type: Grant
    Filed: May 15, 2003
    Date of Patent: June 28, 2005
    Assignee: Xerox Corporation
    Inventors: H. Bruce Goodbrand, Nan-Xing Hu, Ah-Mee Hor, Cheng-Kuo Hsiao, Yvan Gagnon, Cuong Vong
  • Electroluminescent (EL) devices
    Patent number: 6821643
    Abstract: An electroluminescent device comprised of an anode and a cathode, and situated therebetween said anode and said cathode at least one electron transport layer comprised of a triazine of the formula wherein A is a monovalent or a multi-valent aromatic group which contains at least two conjugate-linked or at least two fused aromatic rings; Ar1 and Ar2 are each independently aryl or aliphatic; and m represents the number of repeating segments.
    Type: Grant
    Filed: January 21, 2000
    Date of Patent: November 23, 2004
    Assignee: Xerox Corporation
    Inventors: Nan-Xing Hu, Mohammad Esteghamatian, Zoran D. Popovic, Beng S. Ong, Ah-Mee Hor
  • Photosensitive member having nano-size filler
    Publication number: 20040229141
    Abstract: An imaging member having a substrate, a charge transport layer having charge transport materials dispersed therein, and an overcoat layer, wherein at least one of the charge transport layer and the overcoat layer comprise nano-size fillers having a particle size of from about 1 to about 250 nanometers.
    Type: Application
    Filed: May 15, 2003
    Publication date: November 18, 2004
    Applicant: Xerox Corporation
    Inventors: H. Bruce Goodbrand, Nan-Xing Hu, Ah-Mee Hor, Cheng-Kuo Hsiao, Yvan Gagnon, Cuong Vong
  • Organic light emitting device (OLED) with thick (100 to 250 nanometers) porphyrin buffer layer
    Patent number: 6811896
    Abstract: An organic light emitting device (OLED) has a thick (100 to 250 nanometers) porphyrin buffer layer between the anode and the luminescent region. The thick porphyrin buffer layer in the OLED results in a small increase in device operating voltage, reduces the possibility of OLED shorting and can improve color purity in blue emitting OLEDs due to its significant optical absorption in the red range.
    Type: Grant
    Filed: July 29, 2002
    Date of Patent: November 2, 2004
    Assignee: Xerox Corporation
    Inventors: Hany Aziz, Zoran D. Popovic, Nan-Xing Hu, Ah-Mee Hor
  • Imaging members
    Publication number: 20040197685
    Abstract: A photoconductive imaging member comprised of a supporting substrate, and thereover a single layer comprised of a mixture of a photogenerator component, charge transport components, and a certain electron transport component, and a certain polymer binder.
    Type: Application
    Filed: April 4, 2003
    Publication date: October 7, 2004
    Applicant: Xerox Corporation
    Inventors: Andronique loannidis, Nancy L. Belknap, Cindy C. Chen, Lanhui Zhang, Timothy P. Bender, John F. Graham, Ah-Mee Hor, James M. Duff
  • Green organic light emitting devices
    Patent number: 6773830
    Abstract: A device containing a number of layers with one of the layers containing a green emitting component.
    Type: Grant
    Filed: November 8, 2001
    Date of Patent: August 10, 2004
    Assignee: Xerox Corporation
    Inventors: Hany Aziz, Cuong Vong, Nan-Xing Hu, Zoran D. Popovic, Ah-Mee Hor
  • Photoconductive members
    Publication number: 20040151996
    Abstract: A photoconductive imaging member comprised of a supporting substrate, and thereover a single photoactive layer comprised of a mixture of a photogenerator component, an electron transport component, a transport component, and a polymeric binder; and wherein said photogenerating component is comprised of a mixture of a metal free phthalocyanine and a hydroxygallium phthalocyanine.
    Type: Application
    Filed: January 30, 2003
    Publication date: August 5, 2004
    Applicant: Xerox Corporation
    Inventors: Cuong Vong, John F. Graham, Ah-Mee Hor, James M. Duff
  • Organic devices
    Patent number: 6759146
    Abstract: An electroluminescent device containing a number of layers with a mixed region of a hole transport compound, and an electron transport compound, and hole and electron transport regions.
    Type: Grant
    Filed: November 8, 2001
    Date of Patent: July 6, 2004
    Assignee: Xerox Corporation
    Inventors: Hany Aziz, Nan-Xing Hu, Ah-Mee Hor, Zoran D. Popovic
  • Organic light emitting devices
    Patent number: 6753098
    Abstract: An electroluminescence (EL) device containing a number of layers, including two electrodes and positioned between the electrodes a mixed region, a hole transport region, and an electron transport region, wherein the mixed region contains, for example, biphenyl TPD, an electron transport compound and a luminescent compound.
    Type: Grant
    Filed: November 8, 2001
    Date of Patent: June 22, 2004
    Assignee: Xerox Corporation
    Inventors: Hany Aziz, Nan-Xing Hu, Cuong Vong, Ah-Mee Hor, Zoran D. Popovic
  • Organic light emitting devices
    Patent number: 6740429
    Abstract: An organic light emitting device containing (i) an anode or a first electrode; (ii) a hole transport layer containing, for example, a mixture of a porphyrin and a hole transport material (iii) a mixed region containing a mixture of (1) a hole transport material, and (2) an electron transport material; (iv) a cathode or second electrode, and wherein the organic light emitting device may further contain at least one of (v) an electron transport region interposed between the mixed region and the cathode; and (vi) a thermal protective element coated on one of the anode and cathode.
    Type: Grant
    Filed: November 8, 2001
    Date of Patent: May 25, 2004
    Assignee: Xerox Corporation
    Inventors: Hany Aziz, Cuong Vong, Nan-Xing Hu, Zoran D. Popovic, Ah-Mee Hor