Patents by Inventor Takeshi Takada

Takeshi Takada 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: 10534297
    Abstract: Provided is an electrophotographic rotatable pressing member having further durability. The electrophotographic rotatable pressing member includes: a substrate; and an elastic layer formed on the substrate, the elastic layer containing a silicone rubber and a needle-shaped filler dispersed in the silicone rubber and having hollow parts, wherein, when cutting the elastic layer along a cross section including a center axis of the substrate in a longitudinal direction of the electrophotographic rotatable pressing member, and a total of each sectional area of the hollow parts in a unit area A2 of a cross-sectional surface is defined as A1, a standard deviation of an area ratio A1/A2 is 0.08 or less.
    Type: Grant
    Filed: May 30, 2019
    Date of Patent: January 14, 2020
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Jun Miura, Yutaka Arai, Takeshi Suzuki, Akeshi Asaka, Shigeaki Takada, Masaaki Takahashi, Yo Imaizumi
  • Publication number: 20190278202
    Abstract: Provided is an electrophotographic rotatable pressing member having further durability. The electrophotographic rotatable pressing member includes: a substrate; and an elastic layer formed on the substrate, the elastic layer containing a silicone rubber and a needle-shaped filler dispersed in the silicone rubber and having hollow parts, wherein, when cutting the elastic layer along a cross section including a center axis of the substrate in a longitudinal direction of the electrophotographic rotatable pressing member, and a total of each sectional area of the hollow parts in a unit area A2 of a cross-sectional surface is defined as A1, a standard deviation of an area ratio A1/A2 is 0.08 or less.
    Type: Application
    Filed: May 30, 2019
    Publication date: September 12, 2019
    Inventors: Jun Miura, Yutaka Arai, Takeshi Suzuki, Akeshi Asaka, Shigeaki Takada, Masaaki Takahashi, Yo Imaizumi
  • Patent number: 10353330
    Abstract: Provided is an electrophotographic rotatable pressing member having further durability. The electrophotographic rotatable pressing member includes: a substrate; and an elastic layer formed on the substrate, the elastic layer containing a silicone rubber and a needle-shaped filler dispersed in the silicone rubber and having hollow parts, wherein, when cutting the elastic layer along a cross section including a center axis of the substrate in a longitudinal direction of the electrophotographic rotatable pressing member, and a total of each sectional area of the hollow parts in a unit area A2 of a cross-sectional surface is defined as A1, a standard deviation of an area ratio A1/A2 is 0.08 or less.
    Type: Grant
    Filed: March 20, 2018
    Date of Patent: July 16, 2019
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Jun Miura, Yutaka Arai, Takeshi Suzuki, Akeshi Asaka, Shigeaki Takada, Masaaki Takahashi, Yo Imaizumi
  • Patent number: 8552182
    Abstract: A method for producing a 3-(substituted oxy)-4-pyridazinol compound represented by the following general formula (I): comprising reacting a compound represented by the following general formula (III): with a compound represented by the following general formula (IV): MO—R2??(IV). The compound represented by the general formula (I) can be reacted with a compound represented by the following general formula (VI): to provide a compound of general formula (V): Each of the groups in the formulas is defined. The compounds of general formulas (I) and (V) can be obtained in a high yield and with high selectivity at a low cost, and therefore various functional and active substances can be advantageously synthesized using the compounds as a medicine, an agricultural chemical, a functional material, or an intermediate thereof.
    Type: Grant
    Filed: September 29, 2010
    Date of Patent: October 8, 2013
    Assignee: Mitsui Chemicals Agro, Inc.
    Inventors: Hideaki Ikishima, Nobuhiro Kondo, Takeshi Takada, Yoshihisa Tsukamoto, Hidetake Yoshitomi, Haruko Mita
  • Patent number: 8263297
    Abstract: An electrophotographic photoconductor including a conductive support and a photosensitive layer, wherein the photosensitive layer contains a charge generation agent, a charge transport agent and a binder resin, and wherein the charge generation agent contains an asymmetric disazo pigment represented by General Formula (I), the charge transport agent contains a triphenylamine compound represented General Formula (IX), and the mass ratio of the charge transport agent to the binder resin is 0.3 to 2.0, where R1 and R2 each represent a substituted or unsubstituted alkyl group, alkoxy group, aryl group or heterocyclic group, provided that R1 and R2 are different, where R3 to R5 each represent hydrogen, a halogen atom, an alkyl group having 1 to 6 carbon atoms, which may have a substituent, an alkoxy group having 1 to 6 carbon atoms, which may have a substituent, or a substituted or unsubstituted aryl group having 6 to 12 carbon atoms.
    Type: Grant
    Filed: November 25, 2008
    Date of Patent: September 11, 2012
    Assignees: Ricoh Company, Ltd., Yamanashi Electronics Co., Ltd.
    Inventors: Takaaki Ikegami, Takeshi Takada, Toshihiko Koizumi, Hideki Nakamura, Hajime Suzuki, Keisuke Shimoyama, Kohsuke Yamamoto, Eiji Kurimoto
  • Publication number: 20120184736
    Abstract: Disclosed is a method for producing a 3-(substituted oxy)-4-pyridazinol derivative represented by the general formula (I), which comprises reacting a compound represented by the general formula (III) with a compound represented by the general formula (IV) in the presence or absence of a base and in the presence or absence of a solvent. According to the present invention, a 3-(substituted oxy)-4-pyridazinol derivative represented by the general formula (I) can be produced in high yield and with high selectivity.
    Type: Application
    Filed: September 29, 2010
    Publication date: July 19, 2012
    Applicant: MITSUI CHEMICALS AGRO, INC
    Inventors: Hideaki Ikishima, Nobuhiro Kondo, Takeshi Takada, Yoshihisa Tsukamoto, Hidetake Yoshitomi, Haruko Mita
  • Patent number: 8097393
    Abstract: An image forming apparatus at least containing an electrophotographic photoconductor, a latent electrostatic image forming unit, a developing unit, a transferring unit, and a fixing unit, wherein a glass transition temperature of an outermost layer of the electrophotographic photoconductor is 100° C. or more, wherein the toner is obtained by dissolving and/or dispersing the toner material containing at least an active hydrogen group-containing compound and a polymer reactive with the active hydrogen group-containing compound in an organic solvent to form a solution and/or a dispersion, emulsifying and/or dispersing the solution and/or the dispersion in an aqueous medium containing resin fine particles, allowing the active hydrogen group-containing compound and the polymer reactive with the active hydrogen group-containing compound to react in the aqueous medium, and removing the organic solvent, wherein a glass transition temperature of the resin fine particles is 65° C. to 85° C.
    Type: Grant
    Filed: April 3, 2007
    Date of Patent: January 17, 2012
    Assignee: Ricoh Company, Ltd.
    Inventors: Takeshi Takada, Takaaki Ikegami
  • Patent number: 8007972
    Abstract: An object of the present invention is to provide an image forming apparatus containing an electrophotographic photoconductor, a charging unit, an exposing unit, a developing unit, a transfer unit and a cleaning unit, wherein the electrophotographic photoconductor contains a support and at least a photosensitive layer disposed on the support, wherein the photosensitive layer contains a charge generating material and a compound expressed by the following Structural Formula (1), and wherein, in the Structural Formula (1), “R1” and “R2” may be identical to each other or different, and represent any one of hydrogen atom, alkyl group which may be substituted, cycloalkyl group which may be substituted and aralkyl group which may be substituted.
    Type: Grant
    Filed: September 15, 2006
    Date of Patent: August 30, 2011
    Assignee: Ricoh Company, Ltd.
    Inventors: Eiji Kurimoto, Keisuke Shimoyama, Michio Kimura, Shinichi Kawamura, Takeshi Takada, Yasuyuki Yamashita, Naohiro Toda, Hideo Nakamori
  • Publication number: 20110036776
    Abstract: A processing method of liquid includes: decomposing a resin in liquid by allowing ozone gas to contact the liquid containing a water-soluble carbonyl compound and the resin; and removing organic acid generated by decomposing the resin in the decomposing step from the liquid by performing on the liquid after being subjected to the decomposing step an ion exchange process using an ion exchange resin. The liquid to be subjected to the ion exchange process contains water.
    Type: Application
    Filed: August 10, 2010
    Publication date: February 17, 2011
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Hirohisa Fujita, Masashi Miyagawa, Takeshi Takada, Kouji Inoue
  • Patent number: 7851114
    Abstract: An electrostatic latent image bearing member is provided including a substrate and a photosensitive layer located overlying the substrate, wherein the outermost layer of the electrostatic latent image bearing member includes a cross-linked resin formed from a cross-linking reaction between a charge transport polyol having a specific formula and an isocyanate compound; and the use of the electrostatic latent image bearing member in an image forming apparatus, a process cartridge, and an image forming method.
    Type: Grant
    Filed: November 21, 2006
    Date of Patent: December 14, 2010
    Assignee: Ricoh Company Limited
    Inventors: Akihiro Sugino, Takaaki Ikegami, Takeshi Takada, Kazukiyo Nagai
  • Patent number: 7781134
    Abstract: A photoreceptor is provided having an electroconductive substrate and a photosensitive layer located overlying the electroconductive substrate, wherein an outermost layer of the photoreceptor contains a binder resin, wherein the binder resin solution satisfies the following relationship 2?(T0?T400)/C wherein T0 represents a initial transmittance (%) at 400 nm of the binder resin solution; T400 represents a transmittance (%) at 400 nm of the binder resin solution which has been allowed to settle for 400 hours under conditions of 23° C. and 40% RH; and C represents the concentration of the binder resin solution; and an image forming method, an image forming apparatus and a process cartridge including the photoreceptor.
    Type: Grant
    Filed: December 27, 2005
    Date of Patent: August 24, 2010
    Assignee: Ricoh Company, Ltd.
    Inventors: Takeshi Takada, Takaaki Ikegami, Akihiro Sugino
  • Patent number: 7694466
    Abstract: An apparatus for holding a plurality of solar cell units includes a mounting member to be fixed onto a roof, a plurality of fixtures, and a frame member having to-be-sandwiched portions to be sandwiched and fixed between the mounting member and the fixtures, and grooves that support the ends of the plate-shaped solar cell units. The to-be-sandwiched portions of the frame members are positioned inside projection plane regions that project the solar cell units and the grooves immediately below, whereby the distance between adjacent solar cell units reduces.
    Type: Grant
    Filed: August 12, 2004
    Date of Patent: April 13, 2010
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Shinsuke Miyamoto, Hiroyoshi Takikawa, Naoki Ito, Takeshi Takada, Kouji Shimasaki
  • Patent number: 7629494
    Abstract: A process for producing a cyclopropylphenol represented by of formula (10): wherein R1, R2, R3 and R4 each may represent a hydrogen; Z represents a hydrogen, alkyl, alkenyl, alkynyl, cycloalkyl or phenyl; and Y1, Y2 and Y3 each may represent a hydrogen; by reacting a compound of formula (7): wherein X represents a halogen; and V represents a hydrogen or —W—R5, with a metal, metal salt or organometallic compound of formula (8): M2 to obtain a compound of formula (9): and obtaining a compound of formula (10) by hydrolysis in the case wherein V represents —W—R5, wherein W is CO, SO or SO2 and R5 is alkyl, haloalkyl, cycloalkyl, alkenyl, alkynyl, phenyl, alkoxy or haloalkoxy.
    Type: Grant
    Filed: March 31, 2006
    Date of Patent: December 8, 2009
    Assignee: Mitsui Chemicals Agro, Inc.
    Inventors: Yoshihisa Tsukamoto, Hiroyuki Komai, Toshio Kaneko, Takeshi Takada
  • Publication number: 20090136260
    Abstract: An electrophotographic photoconductor including a conductive support and a photosensitive layer, wherein the photosensitive layer contains a charge generation agent, a charge transport agent and a binder resin, and wherein the charge generation agent contains an asymmetric disazo pigment represented by General Formula (I), the charge transport agent contains a triphenylamine compound represented General Formula (IX), and the mass ratio of the charge transport agent to the binder resin is 0.3 to 2.0, where R1 and R2 each represent a substituted or unsubstituted alkyl group, alkoxy group, aryl group or heterocyclic group, provided that R1 and R2 are different, where R3 to R5 each represent hydrogen, a halogen atom, an alkyl group having 1 to 6 carbon atoms, which may have a substituent, an alkoxy group having 1 to 6 carbon atoms, which may have a substituent, or a substituted or unsubstituted aryl group having 6 to 12 carbon atoms.
    Type: Application
    Filed: November 25, 2008
    Publication date: May 28, 2009
    Applicants: RICOH COMPANY, LTD,, YAMANASHI ELECTRONICS CO., LTD.
    Inventors: Takaaki IKEGAMI, Takeshi Takada, Toshihiko Koizumi, Hideki Nakamura, Hajime Suzuki, Keisuke Shimoyama, Kohsuke Yamamoto, Eiji Kurimoto
  • Patent number: 7531278
    Abstract: An electrostatic latent image bearer, comprising a substrate; a photosensitive layer overlying the substrate; and a protective layer overlying the photosensitive layer, wherein the protective layer includes a binder resin comprising a polyol, a polyisocyanate and an organic silicon compound having a hydroxyl or a hydrolyzable group.
    Type: Grant
    Filed: July 14, 2006
    Date of Patent: May 12, 2009
    Assignee: Ricoh Company, Ltd.
    Inventors: Akihiro Sugino, Takaai Ikegami, Takeshi Takada
  • Publication number: 20090054681
    Abstract: A process for producing a cyclopropylphenol represented by of formula (10): wherein R1, R2, R3 and R4 each may represent a hydrogen; Z represents a hydrogen, alkyl, alkenyl, alkynyl, cycloalkyl or phenyl; and Y1, Y2 and Y3 each may represent a hydrogen; by reacting a compound of formula (7): wherein X represents a halogen; and V represents a hydrogen or —W—R5, with a metal, metal salt or organometallic compound of formula (8): M2 to obtain a compound of formula (9): and obtaining a compound represented by general of formula (10) by hydrolysis in the case wherein V represents —W—R5, wherein W is CO, SO or SO2 and R5 is alkyl, haloalkyl, cycloalkyl, alkenyl, alkynyl, phenyl, alkoxy or haloalkoxy.
    Type: Application
    Filed: March 31, 2006
    Publication date: February 26, 2009
    Applicant: SANKYO AGRO COMPANY, LIMITED
    Inventors: Yoshihisa Tsukamoto, Hiroyuki Komai, Toshio Kaneko, Takeshi Takada
  • Patent number: 7432439
    Abstract: A terminal box of an output part of a solar cell module, including a case and an outer lid that are molded with a thermoplastic resin and an removal cable cover that is of a knockout type and is arranged in the case includes an inner lid that covers to close an electric circuit that is housed in the case.
    Type: Grant
    Filed: March 12, 2004
    Date of Patent: October 7, 2008
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Takeshi Takada, Akihiro Takami
  • Publication number: 20080169018
    Abstract: An apparatus for holding a plurality of solar cell units includes a mounting member to be fixed onto a roof, a plurality of fixtures, and a frame member having to-be-sandwiched portions to be sandwiched and fixed between the mounting member and the fixtures, and grooves that support the ends of the plate-shaped solar cell units. The to-be-sandwiched portions of the frame members are positioned inside projection plane regions that project the solar cell units and the grooves immediately below, whereby the distance between adjacent solar cell units reduces.
    Type: Application
    Filed: August 12, 2004
    Publication date: July 17, 2008
    Applicant: MITSUBISHI DENKI KABUSHIKI KAISHA
    Inventors: Shinsuke Miyamoto, Hiroyoshi Takikawa, Naoki Ito, Takeshi Takada, Kouji Shimasaki
  • Patent number: 7391994
    Abstract: Disclosed is an image forming apparatus for lowering friction coefficient and lowering surface energy of photoconductor surface in particular, which comprises an electrophotographic photoconductor, charging unit, light exposure unit, developing unit, transferring unit, and fixing unit, the electrophotographic photoconductor comprises a photosensitive layer on a conductive support and fluoropolymer fine particles at the outermost layer, a part of the fluoropolymer fine particles are exposed above the surface of the outermost layer in configurations of primary particles and secondary particles formed by flocculation of plural primary particles, and sum of area ratios of particles in the configurations of the primary particles and the secondary particles, each particles having an average diameter D of 0.15 ?m?D?3.
    Type: Grant
    Filed: December 8, 2004
    Date of Patent: June 24, 2008
    Assignee: Ricoh Company, Ltd.
    Inventors: Takeshi Takada, Takaaki Ikegami, Akihiro Sugino
  • Patent number: 7374848
    Abstract: A toner including a binder; a colorant; and a wax, wherein the binder includes a polyester resin; and a reaction product of a polymer having a group capable of reacting with an active hydrogen with a compound having an active hydrogen, wherein the polyester resin includes tetrahydrofuran(THF)-soluble resin components in an amount of from 50 to 85% by weight; and chloroform-insoluble components in an amount of from 0 to 30% by weight, and wherein the toner satisfies the following relationship (1): 5% by weight<(C1-C2)<60% by weight ??(1) wherein C1 represents a content of chloroform-insoluble components in the toner in units of % by weight and C2 represents a content of the colorant therein in units of % by weight.
    Type: Grant
    Filed: June 22, 2004
    Date of Patent: May 20, 2008
    Assignee: Ricoh Company, Limited
    Inventors: Sonoh Matsuoka, Ryohta Inoue, Masahiro Ohki, Takeshi Takada, Chiaki Tanaka, Naohiro Watanabe, Masahide Yamada