Patents by Inventor Mieko Seki

Mieko Seki 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).

  • Patent number: 10031394
    Abstract: There is provided an electrophoretic particle which contains a core material particle formed of a composition containing a resin, a nitrogen-containing heterocyclic compound having any one of an imino group, a methylol group and an alkoxymethyl group in the molecule and a heterocyclic ring having a nitrogen atom, and a coloring agent.
    Type: Grant
    Filed: December 19, 2012
    Date of Patent: July 24, 2018
    Assignee: E Ink Corporation
    Inventors: Daisuke Nakayama, Yasuo Yamamoto, Naoki Hiji, Mieko Seki, Ryota Mizutani, Chikara Manabe, Cao Jun, Toshihide Aoshima
  • Patent number: 9874829
    Abstract: Provided is a dispersant for liquid development represented by general formula (1): where R1 represents a monovalent organic group having a polar group, A1 and A2 each represent an oxygen or sulfur atom, L1 and L2 each represent a divalent organic linking group, X represents a (m+n)-valent organic linking group having an alkyleneoxy group, P1 represents a polymer chain containing a unit represented by general formula (2), and m and n each represent a number of 1 to 9, with m+n being an integer of 2 to 10: where R2 and R3 each represent a hydrogen atom or a methyl group, L3 represents a carbonyloxy, oxycarbonyl, carbonyl, or phenylene group, and R4 represents a monovalent organic group having at least one selected from a carboxy group, a polyoxyalkylene group, an amino group, a sulfo group, and derivatives of the foregoing.
    Type: Grant
    Filed: July 29, 2016
    Date of Patent: January 23, 2018
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Mieko Seki, Yasuo Yamamoto
  • Publication number: 20170277055
    Abstract: Provided is a dispersant for liquid development represented by general formula (1): where R1 represents a monovalent organic group having a polar group, A1 and A2 each represent an oxygen or sulfur atom, L1 and L2 each represent a divalent organic linking group, X represents a (m+n)-valent organic linking group having an alkyleneoxy group, P1 represents a polymer chain containing a unit represented by general formula (2), and m and n each represent a number of 1 to 9, with m+n being an integer of 2 to 10: where R2 and R3 each represent a hydrogen atom or a methyl group, L3 represents a carbonyloxy, oxycarbonyl, carbonyl, or phenylene group, and R4 represents a monovalent organic group having at least one selected from a carboxy group, a polyoxyalkylene group, an amino group, a sulfo group, and derivatives of the foregoing.
    Type: Application
    Filed: July 29, 2016
    Publication date: September 28, 2017
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Mieko SEKI, Yasuo YAMAMOTO
  • Patent number: 9152005
    Abstract: A particle dispersion for display includes color particles for display that move in response to an electric field and include first color particles and second color particles; and a dispersion medium that disperses the color particles for display, in which the second color particles have a larger particle diameter than a particle diameter of the first color particles and the same charging characteristic as a charging characteristic of the first color particles, and in the color particles for display, a ratio (Cs/Cl) of a charge amount Cs of the first color particles per unit area of display to a charge amount Cl of the second color particles per unit area of display is less than or equal to 5.
    Type: Grant
    Filed: April 26, 2013
    Date of Patent: October 6, 2015
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Takashi Morikawa, Naoki Hiji, Yasuo Yamamoto, Daisuke Nakayama, Mieko Seki, Hiroaki Moriyama, Ryota Mizutani, Masaaki Abe, Nami Tokunaga, Chikara Manabe, Jun Cao
  • Publication number: 20140104675
    Abstract: A particle dispersion for display includes color particles for display that move in response to an electric field and include first color particles and second color particles; and a dispersion medium that disperses the color particles for display, in which the second color particles have a larger particle diameter than a particle diameter of the first color particles and the same charging characteristic as a charging characteristic of the first color particles, and in the color particles for display, a ratio (Cs/Cl) of a charge amount Cs of the first color particles per unit area of display to a charge amount Cl of the second color particles per unit area of display is less than or equal to 5.
    Type: Application
    Filed: April 26, 2013
    Publication date: April 17, 2014
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Takashi Morikawa, Naoki Hiji, Yasuo Yamamoto, Daisuke Nakayama, Mieko Seki, Hiroaki Moriyama, Ryota Mizutani, Masaaki Abe, Nami Tokunaga, Chikara Manabe, Jun Cao
  • Patent number: 8435646
    Abstract: An organic electroluminescent device, having an organic compound layer including two or more layers including at least a buffer layer and an emitting layer, wherein at least one of the organic compound layers other than the buffer layer contains at least one charge-transporting polyester represented by Formula (I-1) or (I-2), and the buffer layer is formed in contact with an anode and contains a crosslinked compound formed by using at least one charge injection material containing a substituted silicon group and represented by Formula (III).
    Type: Grant
    Filed: October 24, 2007
    Date of Patent: May 7, 2013
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Daisuke Okuda, Katsuhiro Sato, Kiyokazu Mashimo, Takeshi Agata, Toru Ishii, Akira Imai, Tadayoshi Ozaki, Hidekazu Hirose, Hirohito Yoneyama, Mieko Seki, Yohei Nishino, Koji Horiba
  • Patent number: 8264140
    Abstract: An organic electroluminescence element includes a pair of electrodes composed of an anode and a cathode, at least one of which is transparent or semitransparent, and one or more organic compound layers disposed between the pair of electrodes, wherein at least one of the organic compound layers comprises at least one charge-transporting polyester consisting of repeating units containing, as a partial structure, at least one structure represented by the following formula (I-1).
    Type: Grant
    Filed: March 19, 2008
    Date of Patent: September 11, 2012
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Koji Horiba, Hidekazu Hirose, Tadayoshi Ozaki, Yohei Nishino, Mieko Seki, Takeshi Agata, Akira Imai, Katsuhiro Sato, Kiyokazu Mashimo, Hirohito Yoneyama, Toru Ishii, Daisuke Okuda
  • Patent number: 8120719
    Abstract: A photo-addressable display medium is provided, the photo-addressable display medium including: a pair of electrodes having transparency; a photoconductive layer disposed between the pair of electrodes and having a laminated structure of a first charge generation layer, a charge transport layer and a second charge generation layer in this order from an exposing light irradiation side; and a liquid crystal layer disposed between an electrode of the inverse side to the exposing light irradiation side and the second charge generation layer and having memory performance, wherein the first charge generation layer and the second charge generation layer contain a phthalocyanine compound, and the charge transport layer contains a stilbene compound represented by the following formula (1): wherein, R1 to R4 each independently represents a hydrogen atom, a methyl group or an ethyl group.
    Type: Grant
    Filed: March 30, 2010
    Date of Patent: February 21, 2012
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Mieko Seki, Hiroe Okuyama, Yasuhiro Yamaguchi, Tomozumi Uesaka, Hideo Kobayashi
  • Patent number: 7948567
    Abstract: An optically writable display medium includes an optical switching element and a display element. The optical switching element includes a charge transport layer sandwiched between an upper charge generating layer and a lower charge generating layer. The display element includes a display layer having memory properties and is provided on the optical switching element. The absorption wavelength region of the upper charge generating layer and the absorption wavelength region of the lower charge generating layer are substantially different from each other.
    Type: Grant
    Filed: October 14, 2008
    Date of Patent: May 24, 2011
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Hideo Kobayashi, Yasuhiro Yamaguchi, Tomozumi Uesaka, Mieko Seki, Hiroe Okuyama, Masaaki Araki
  • Patent number: 7910748
    Abstract: An organic electroluminescent device with a pair of electrodes having an anode and a cathode, and one or more organic compound layers disposed therebetween. One of the anode or the cathode is transparent or semitransparent.
    Type: Grant
    Filed: November 27, 2009
    Date of Patent: March 22, 2011
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Yoshihiro Ohba, Kazuaki Sato, Mieko Seki, Hidekazu Hirose, Takeshi Agata, Koji Horiba, Akira Imai, Tadayoshi Ozaki, Yohei Nishino, Hirohito Yoneyama, Daisuke Okuda, Toru Ishii, Kiyokazu Mashimo, Katsuhiro Sato
  • Patent number: 7902382
    Abstract: A thiophene-containing compound polymer represented by Y represents a bivalent hydrocarbon group; R5 represents a hydrogen atom; Z represents a bivalent hydrocarbon group; m represents 1; p represents an integer of 5 to 5,000; B and B? each represent OCH2CH2OH, and A represents a group represented by the following formula (X-III): Ar1 is a substituted or unsubstituted monovalent aromatic group; R1 to R3 each independently represent a hydrogen atom, a substituted or unsubstituted alkyl group, a substituted or unsubstituted aryl group, or a substituted or unsubstituted aralkyl group; and n representing an integer of 1 to 5.
    Type: Grant
    Filed: November 27, 2009
    Date of Patent: March 8, 2011
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Yoshihiro Ohba, Kazuaki Sato, Mieko Seki, Hidekazu Hirose, Takeshi Agata, Koji Horiba, Akira Imai, Tadayoshi Ozaki, Yohei Nishino, Hirohito Yoneyama, Daisuke Okuda, Toru Ishii, Kiyokazu Mashimo, Katsuhiro Sato
  • Publication number: 20110051024
    Abstract: A photo-addressable display medium is provided, the photo-addressable display medium including: a pair of electrodes having transparency; a photoconductive layer disposed between the pair of electrodes and having a laminated structure of a first charge generation layer, a charge transport layer and a second charge generation layer in this order from an exposing light irradiation side; and a liquid crystal layer disposed between an electrode of the inverse side to the exposing light irradiation side and the second charge generation layer and having memory performance, wherein the first charge generation layer and the second charge generation layer contain a phthalocyanine compound, and the charge transport layer contains a stilbene compound represented by the following formula (1): wherein, R1 to R4 each independently represents a hydrogen atom, a methyl group or an ethyl group.
    Type: Application
    Filed: March 30, 2010
    Publication date: March 3, 2011
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Mieko SEKI, Hiroe OKUYAMA, Yasuhiro YAMAGUCHI, Tomozumi UESAKA, Hideo KOBAYASHI
  • Publication number: 20100225837
    Abstract: The invention provides a display medium including: a first electrode; a second electrode; a liquid crystal layer provided between the first electrode and the second electrode; a photoconductive layer provided between the second electrode and the liquid crystal layer, the photoconductive layer absorbing light of a predetermined wavelength used for writing, and thereby exhibiting an electrical characteristic corresponding to the intensity distribution of the light used for writing; a first light absorption layer provided between the liquid crystal layer and the photoconductive layer, the first light absorption layer absorbing light transmitted through the liquid crystal layer; a second light absorption layer provided at the side of the second electrode not facing the photoconductive layer, the second light absorption layer allowing transmission of the light used for writing and having an absorbance of 1 or more with respect to light of any wavelength in a range of from 300 nm to 550 nm.
    Type: Application
    Filed: December 17, 2009
    Publication date: September 9, 2010
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Mieko SEKI, Yasuhiro YAMAGUCHI, Tomozumi UESAKA, Hideo KOBAYASHI, Hiroe OKUYAMA, Masaaki ARAKI, Motohiko SAKAMAKI
  • Patent number: 7749618
    Abstract: An organic electroluminescent device having a pair of electrodes including a positive electrode and a negative electrode at least one of which is transparent or translucent, and one or more organic compound layers interposed between the pair of electrodes, at least one layer of the organic compound layers containing at least one charge transporting polyester having a repeating unit that contains at least one structure selected from structures represented by the following formula (I-1) as a partial structure.
    Type: Grant
    Filed: May 8, 2007
    Date of Patent: July 6, 2010
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Koji Horiba, Hidekazu Hirose, Mieko Seki, Akira Imai, Tadayoshi Ozaki, Takeshi Agata, Katsuhiro Sato, Hirohito Yoneyama, Yohei Nishino, Kiyokazu Mashimo, Daisuke Okuda, Toru Ishii
  • Publication number: 20100133995
    Abstract: An organic electroluminescent device with a pair of electrodes having an anode and a cathode, and one or more organic compound layers disposed therebetween. One of the anode or the cathode is transparent or semitransparent.
    Type: Application
    Filed: November 27, 2009
    Publication date: June 3, 2010
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Yoshihiro Ohba, Kazuaki Sato, Mieko Seki, Hidekazu Hirose, Takeshi Agata, Koji Horiba, Akira Imai, Tadayoshi Ozaki, Yohei Nishino, Hirohito Yoneyama, Daisuke Okuda, Toru Ishii, Kiyokazu Mashimo, Katsuhiro Sato
  • Publication number: 20100137553
    Abstract: A thiophene-containing compound polymer represented by Y represents a bivalent hydrocarbon group; R5 represents a hydrogen atom; Z represents a bivalent hydrocarbon group; m represents 1; p represents an integer of 5 to 5,000; B and B? each represent OCH2CH2OH, and A represents a group represented by the following formula (X-III): Ar1 is a substituted or unsubstituted monovalent aromatic group; R1 to R3 each independently represent a hydrogen atom, a substituted or unsubstituted alkyl group, a substituted or unsubstituted aryl group, or a substituted or unsubstituted aralkyl group; and n representing an integer of 1 to 5.
    Type: Application
    Filed: November 27, 2009
    Publication date: June 3, 2010
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Yoshihiro Ohba, Kazuaki Sato, Mieko Seki, Hidekazu Hirose, Takeshi Agata, Koji Horiba, Akira Imai, Tadayoshi Ozaki, Yohei Nishino, Hirohito Yoneyama, Daisuke Okuda, Toru Ishii, Kiyokazu Mashimo, Katsuhiro Sato
  • Patent number: 7705114
    Abstract: A method for producing a polymer organic electronic material comprising: synthesizing a polymer organic electronic material by condensing a precursor monomer for the polymer organic electronic material in the presence of a metal catalyst, preparing a polymer organic electronic material solution by dissolving the polymer organic electronic material in an organic solvent, and removing metal ions, which originate from the metal catalyst, from the polymer organic electronic material solution by using an ion exchange resin; a polymer organic electronic material which can be obtained by the method; and an organic electroluminescent device which uses the polymer organic electronic material.
    Type: Grant
    Filed: February 10, 2006
    Date of Patent: April 27, 2010
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Tadayoshi Ozaki, Mieko Seki, Yohei Nishino, Koji Horiba, Hirohito Yoneyama, Daisuke Okuda, Hidekazu Hirose, Takeshi Agata, Toru Ishii, Kiyokazu Mashimo, Katsuhiro Sato, Hiroaki Moriyama
  • Patent number: 7659410
    Abstract: Provided are a thiophene-containing compound represented by the following formula (X-1), and an organic electroluminescent device that includes a pair of electrodes and an organic compound layer disposed therebetween. The organic compound layer includes a charge-transporting polyester having a repeating structure containing at least one structure selected from the structures represented by the following formulae (I-1) and (I-2) as its partial structure. In formula (X-1), Ar1 represents a substituted or unsubstituted monovalent aromatic group; and R1 to R4 each independently represent a hydrogen atom, a substituted or unsubstituted alkyl group, a substituted or unsubstituted aryl group, or a substituted or unsubstituted aralkyl group; and n? is an integer of 1 to 5.
    Type: Grant
    Filed: December 12, 2006
    Date of Patent: February 9, 2010
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Yoshihiro Ohba, Kazuaki Sato, Mieko Seki, Hidekazu Hirose, Takeshi Agata, Koji Horiba, Akira Imai, Tadayoshi Ozaki, Yohei Nishino, Hirohito Yoneyama, Daisuke Okuda, Toru Ishii, Kiyokazu Mashimo, Katsuhiro Sato
  • Patent number: 7589166
    Abstract: The present invention provides a thiophene-containing compound represented by Formula (I) and a thiophene-containing compound polymer using the thiophene-containing compound. In Formula (I), Ar1 represents a substituted or unsubstituted monovalent aromatic group; X represents a divalent straight-chain hydrocarbon group having 1 to 6 carbon atoms, a divalent branched-chain hydrocarbon group having 2 to 10 carbon atoms, or a substituted or unsubstituted divalent aromatic group; R1 to R5 each independently represent a hydrogen atom, an alkyl group, a cyano group, a halogen group, a substituted amino group, a substituted or unsubstituted aryl group, or a substituted or unsubstituted aralkyl group; 1 represents an integer from 1 to 5; and m and k each independently represent 0 or 1.
    Type: Grant
    Filed: April 14, 2006
    Date of Patent: September 15, 2009
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Yoshihiro Ohba, Kazuaki Sato, Yohei Nishino, Mieko Seki, Takeshi Agata, Kiyokazu Mashimo, Katsuhiro Sato, Hirohito Yoneyama, Daisuke Okuda, Hidekazu Hirose, Toru Ishii
  • Publication number: 20090195716
    Abstract: An optically writable display medium includes an optical switching element and a display element. The optical switching element includes a charge transport layer sandwiched between an upper charge generating layer and a lower charge generating layer. The display element includes a display layer having memory properties and is provided on the optical switching element. The absorption wavelength region of the upper charge generating layer and the absorption wavelength region of the lower charge generating layer are substantially different from each other.
    Type: Application
    Filed: October 14, 2008
    Publication date: August 6, 2009
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Hideo KOBAYASHI, Yasuhiro YAMAGUCHI, Tomozumi UESAKA, Mieko SEKI, Hiroe OKUYAMA, Masaaki ARAKI