Patents by Inventor Daisuke Yamashita

Daisuke Yamashita 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).

  • Method for producing toner
    Patent number: 10216106
    Abstract: A method for producing a toner includes a step (1) of forming resin microparticles in an aqueous medium in the presence of a surfactant, a step (2) of aggregating the resin microparticles to form aggregated particles, and a step (3) of heating and the aggregated particles and allowing the aggregated particles to coalesce to form toner particles, in which a resin component in the resin microparticles contains an olefinic copolymer and resin A, the resin A has an acid value of 1 mgKOH/g or more and 50 mgKOH/g or less, the resin A has a SP value of 19.0 (J/cm3)0.5 or more and 21.0 (J/cm3)0.5 or less, and the resin component has an olefinic copolymer content of 50% by mass or more with respect to the total mass of the resin component.
    Type: Grant
    Filed: May 23, 2016
    Date of Patent: February 26, 2019
    Assignee: Canon Kabushiki Kaisha
    Inventors: Tomoyo Miyakai, Junichi Tamura, Hayato Ida, Takaho Shibata, Kouichirou Ochi, Yuya Chimoto, Ryuji Murayama, Daisuke Yamashita, Akemi Watanabe, Takashi Hirasa
  • Toner and method for producing toner
    Patent number: 10203619
    Abstract: A toner including: a binder resin containing an ethylene-vinyl acetate copolymer; a polysiloxane derivative A represented by structural formula 1; and a polysiloxane derivative B represented by structural formula 2: (in structural formula 1, R1 to R10 each independently represent a methyl group or a phenyl group, and l, m and n each independently represent an integer of at least 1) (in structural formula 2, at least one of R11 to R20 is an organic group having a C4-30 alkyl group, a C4-30 alkoxy group, an acrylic group, an amino group, a methacrylic group or a carboxyl group, the remaining groups among R11 to R20 each independently represent a methyl group or a phenyl group, and p, q and r each independently represent an integer of at least 1).
    Type: Grant
    Filed: August 28, 2017
    Date of Patent: February 12, 2019
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Daisuke Yamashita, Takashi Hirasa, Hayato Ida, Junichi Tamura, Takaho Shibata, Ryuji Murayama, Kouichirou Ochi, Yuya Chimoto, Tomoyo Miyakai
  • Method of reusing core sand
    Patent number: 10183322
    Abstract: A method of reusing core sand includes: crushing a core used for casting into granules; heating the granules at a temperature of 300° C. to 550° C.; causing the heated granules to collide against each other such that water glass used as a binder detaches from the core sand; and blowing air into a mixture of the water glass and the core sand, which are detached from each other, such that the core sand is separated and collected from the mixture due to a difference in specific gravity between the water glass and the core sand.
    Type: Grant
    Filed: October 6, 2016
    Date of Patent: January 22, 2019
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Daisuke Yamashita, Hirotsune Watanabe, Masashi Morikawa
  • POSITIVE ELECTRODE ACTIVE MATERIAL FOR LITHIUM SECONDARY BATTERIES, METHOD OF PRODUCING POSITIVE ELECTRODE ACTIVE MATERIAL FOR LITHIUM SECONDARY BATTERIES, POSITIVE ELECTRODE FOR LITHIUM SECONDARY BATTERIES, AND LITHIUM SECONDARY BATTERY
    Publication number: 20180316008
    Abstract: A positive electrode active material for lithium secondary batteries which is able to doped/undoped with lithium ions and contains at least Ni, in which a ratio P/Q (atom %/mass %) of a concentration P (atom %) of sulfur atoms being present in a surface of the positive electrode active material to a concentration Q (mass %) of sulfuric acid radicals being present in the whole positive electrode active material is more than 0.8 and less than 5.0, and the Q (mass %) is 0.01 or more and 2.0 or less.
    Type: Application
    Filed: November 4, 2016
    Publication date: November 1, 2018
    Inventors: Takashi ARIMURA, Jun-ichi KAGEURA, Kenji TAKAMORI, Kimiyasu NAKAO, Daisuke YAMASHITA, Yusuke MAEDA
  • Toner and method for producing toner
    Patent number: 10088765
    Abstract: A toner comprising a toner particle including a resin component, wherein the resin component includes an olefin resin and an olefin copolymer including a hydroxyl group, the olefin resin has a specific monomer unit Y1, the olefin copolymer including a hydroxyl group has a specific monomer unit Z1 and Z2, a hydroxyl value of the olefin resin is not more than 10 mg KOH/g, a hydroxyl value of the olefin copolymer including a hydroxyl group is at least 20 mg KOH/g and not more than 250 mg KOH/g, and a content of the olefin resin in the resin component is more than 50 mass % with respect to a total mass of the resin component.
    Type: Grant
    Filed: October 11, 2017
    Date of Patent: October 2, 2018
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Tomoyo Miyakai, Hayato Ida, Takaho Shibata, Junichi Tamura, Ryuji Murayama, Daisuke Yamashita, Takashi Hirasa
  • Toner and method for producing toner
    Patent number: 10078281
    Abstract: A toner having a toner particle containing a resin component, wherein the resin component contains an olefin copolymer having ester group and the like, which has a unit (1), and a unit Y2 that is at least one selected from (2) and (3), the content of the copolymer in the resin component is at least 50 mass % with respect to the total mass of the resin component, and the content of the monomer unit Y2 is 3 to 35 mass % with respect to the total mass of the copolymer; in formulas (1) to (3), R1, R2 and R4 each independently represent H or CH3, and R3 and R5 each independently represent CH3 or C2H5.
    Type: Grant
    Filed: September 1, 2017
    Date of Patent: September 18, 2018
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Hayato Ida, Junichi Tamura, Ryuji Murayama, Takaho Shibata, Daisuke Yamashita, Takashi Hirasa
  • PIPERAZINE DERIVATIVE
    Publication number: 20180230131
    Abstract: [Problem] To provide a compound which can be used as an MC4 receptor agonist. [Means for Solution] The present inventors have investigated MC4 receptor agonists, and have found that a piperazine derivative has an action related to the agonists, thereby completing the present invention. That is, the piperazine derivative of the present invention has an MC4 receptor agonistic action, and can be used as an agent for preventing or treating bladder and/or urinary tract diseases, in particular, underactive bladder, hypotonic bladder, acontractile bladder, detrusor underactivity, neurogenic bladder, urethral relaxation failure, detrusor-external urethral sphincter dyssynergia, and voiding dysfunctions in benign prostatic hyperplasia.
    Type: Application
    Filed: August 2, 2016
    Publication date: August 16, 2018
    Applicant: Astellas Pharma Inc.
    Inventors: Takashi SUGANE, Takuya MAKINO, Daisuke YAMASHITA, Yasuhiro YONETOKU, Daisuke TANABE, Hisashi MIHARA, Norio ASAI, Kazuhiro OSODA, Takafumi SHIMIZU, Hiroyuki MORITOMO, Keizo SUGASAWA, Kyoichi MAENO, Naomi HOSAGAI
  • METHOD OF REUSING CORE SAND
    Publication number: 20180221939
    Abstract: A method of reusing core sand includes crushing a core used for casting into granules; heating the granules at a temperature of 300° C. to 550° C.; causing the heated granules to collide against each other such that water glass used as a binder detaches from the core sand; and blowing air into a mixture of the water glass and the core sand, which are detached from each other, such that the core sand is separated and collected from the mixture due to a difference in specific gravity between the water glass and the core sand.
    Type: Application
    Filed: April 10, 2018
    Publication date: August 9, 2018
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Daisuke YAMASHITA, Hirotsune WATANABE, Masashi MORIKAWA
  • TONER
    Publication number: 20180203370
    Abstract: A toner comprising a toner particle that contains a hybrid resin A and a crystalline polyester resin B, wherein the hybrid resin A has a polyester segment, and a polypropylene glycol segment that has a number-average molecular weight of at least 300, the polyester segment has a structure derived from a condensation reaction between a dicarboxylic acid and a diol, and has an aromatic ring in at least one of the dicarboxylic acid and the diol, and the following condition is satisfied: |SPh?SPc|?|SPp?SPc|<1 where, SPh is SP value of the polyester segment of the hybrid resin A, SPc is SP value of the crystalline polyester resin B, and SPp is SP value of the polypropylene glycol segment of the hybrid resin A.
    Type: Application
    Filed: January 17, 2018
    Publication date: July 19, 2018
    Inventors: Junichi Tamura, Hayato Ida, Takaho Shibata, Yuya Chimoto, Kouichirou Ochi, Ryuji Murayama, Daisuke Yamashita, Tomoyo Miyakai, Takashi Hirasa
  • POSITIVE-ELECTRODE ACTIVE MATERIAL FOR LITHIUM SECONDARY CELL, POSITIVE ELECTRODE FOR LITHIUM SECONDARY CELL, AND LITHIUM SECONDARY CELL
    Publication number: 20180159127
    Abstract: A positive electrode active material for a lithium secondary cell, having a layered structure and comprising at least nickel, cobalt and manganese, the positive electrode active material satisfying requirements (1), (2) and (3) below: (1) a composition represented by a composition formula: Li[Lix(Ni?Co?Mn?M?)1-x]O2, wherein 0?x?0.10, 0.30<??0.34, 0.30<??0.34, 0.32??<0.40, 0???0.10, ?<?, ?+?+?+?=1, M represents at least one metal selected from the group consisting of Fe, Cu, Ti, Mg, Al, W, Zn, Sn, Zr, Ga and V; (2) a secondary particle diameter of 2 ?m or more and 10 ?m or less; and (3) a maximum peak value in a pore diameter range of 90 nm to 150 nm in a pore diameter distribution determined by mercury porosimetry.
    Type: Application
    Filed: June 2, 2016
    Publication date: June 7, 2018
    Applicants: Sumitomo Chemical Company Limited, Tanaka Chemical Corporation
    Inventors: Hiroyuki KURITA, Jun-ichi KAGEURA, Yuichiro IMANARI, Yasutaka IIDA, Daisuke YAMASHITA, Takaaki MASUKAWA, Hiroyuki ITO
  • METHOD FOR PRODUCING TONER
    Publication number: 20180143547
    Abstract: A method for producing a toner includes a step (1) of forming resin microparticles in an aqueous medium in the presence of a surfactant, a step (2) of aggregating the resin microparticles to form aggregated particles, and a step (3) of heating and the aggregated particles and allowing the aggregated particles to coalesce to form toner particles, in which a resin component in the resin microparticles contains an olefinic copolymer and resin A, the resin A has an acid value of 1 mgKOH/g or more and 50 mgKOH/g or less, the resin A has a SP value of 19.0 (J/cm3)0.5 or more and 21.0 (J/cm3)0.5 or less, and the resin component has an olefinic copolymer content of 50% by mass or more with respect to the total mass of the resin component.
    Type: Application
    Filed: May 23, 2016
    Publication date: May 24, 2018
    Inventors: Tomoyo Miyakai, Junichi Tamura, Hayato Ida, Takaho Shibata, Kouichirou Ochi, Yuya Chimoto, Ryuji Murayama, Daisuke Yamashita, Akemi Watanabe, Takashi Hirasa
  • Toner
    Patent number: 9958800
    Abstract: A toner includes a toner particle containing a resin component. The resin component contains an ester group-containing olefin copolymer and an acid group-containing olefin copolymer. For example, the ester group-containing olefin copolymer is an ethylene-vinyl acetate copolymer, and the acid group-containing olefin copolymer is an ethylene-methacrylic acid copolymer. The acid group-containing olefin copolymer has an acid value of 50 to 300 mg KOH/g. The content of the ester group-containing olefin copolymer in the resin component is 50 mass % or more based on the total mass of the resin component. The content of the unit derived from the vinyl acetate is 3 mass % or more and 35 mass % or less based on the total mass of the ester group-containing olefin copolymer.
    Type: Grant
    Filed: April 25, 2017
    Date of Patent: May 1, 2018
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Yuya Chimoto, Hayato Ida, Takaho Shibata, Junichi Tamura, Kouichirou Ochi, Ryuji Murayama, Daisuke Yamashita, Tomoyo Miyakai, Takashi Hirasa, Kentaro Kamae
  • TONER AND METHOD FOR PRODUCING TONER
    Publication number: 20180107128
    Abstract: A toner comprising a toner particle including a resin component, wherein the resin component includes an olefin resin and an olefin copolymer including a hydroxyl group, the olefin resin has a specific monomer unit Y1, the olefin copolymer including a hydroxyl group has a specific monomer unit Z1 and Z2, a hydroxyl value of the olefin resin is not more than 10 mg KOH/g, a hydroxyl value of the olefin copolymer including a hydroxyl group is at least 20 mg KOH/g and not more than 250 mg KOH/g, and a content of the olefin resin in the resin component is more than 50 mass % with respect to a total mass of the resin component.
    Type: Application
    Filed: October 11, 2017
    Publication date: April 19, 2018
    Inventors: Tomoyo Miyakai, Hayato Ida, Takaho Shibata, Junich Tamura, Ryuji Murayama, Daisuke Yamashita, Takashi Hirasa
  • TONER AND METHOD OF PRODUCING TONER
    Publication number: 20180088478
    Abstract: A toner includes a toner particle containing a resin component containing an olefin copolymer, wherein the olefin copolymer includes a specific monomer unit Y1 and a specific monomer unit Y2, and the content of the olefin copolymer in the resin component is more than 50 mass % based on the total mass of the resin component, and the olefin copolymer has a melting point of 80° C. or more and 150° C. or less.
    Type: Application
    Filed: September 25, 2017
    Publication date: March 29, 2018
    Inventors: Hayato Ida, Junichi Tamura, Ryuji Murayama, Takaho Shibata, Daisuke Yamashita, Takashi Hirasa
  • MONITORING DEVICE AND METHOD OF OPERATING THE SAME
    Publication number: 20180084982
    Abstract: A device for radiating pulsed light toward a thrombus in a blood vessel includes a light source configured to output monitoring light to be radiated into the blood vessel, a light detector configured to detect returned light of the monitoring light and output a detection signal, and a computer configured to acquire a time waveform, which is a change in an intensity of the returned light over time, based on the detection signal, wherein the computer is configured to obtain a parameter on the basis of the time waveform and evaluates a reaction in the blood vessel according to the radiation of the pulsed light on the basis of the parameter.
    Type: Application
    Filed: September 25, 2017
    Publication date: March 29, 2018
    Applicant: HAMAMATSU PHOTONICS K.K.
    Inventors: Daisuke YAMASHITA, Yutaka YAMASHITA, Yukio UEDA, Yoshinori TAMAOKI
  • TONER AND METHOD FOR PRODUCING TONER
    Publication number: 20180067410
    Abstract: A toner including: a binder resin containing an ethylene-vinyl acetate copolymer; a polysiloxane derivative A represented by structural formula 1; and a polysiloxane derivative B represented by structural formula 2: (in structural formula 1, R1 to R10 each independently represent a methyl group or a phenyl group, and l, m and n each independently represent an integer of at least 1) (in structural formula 2, at least one of R11 to R20 is an organic group having a C4-30 alkyl group, a C4-30 alkoxy group, an acrylic group, an amino group, a methacrylic group or a carboxyl group, the remaining groups among R11 to R20 each independently represent a methyl group or a phenyl group, and p, q and r each independently represent an integer of at least 1).
    Type: Application
    Filed: August 28, 2017
    Publication date: March 8, 2018
    Inventors: Daisuke Yamashita, Takashi Hirasa, Hayato Ida, Junichi Tamura, Takaho Shibata, Ryuji Murayama, Kouichirou Ochi, Yuya Chimoto, Tomoyo Miyakai
  • TONER AND METHOD FOR PRODUCING TONER
    Publication number: 20180067411
    Abstract: A toner having a toner particle containing a resin component, wherein the resin component contains an olefin copolymer having ester group and the like, which has a unit (1), and a unit Y2 that is at least one selected from (2) and (3), the content of the copolymer in the resin component is at least 50 mass % with respect to the total mass of the resin component, and the content of the monomer unit Y2 is 3 to 35 mass % with respect to the total mass of the copolymer; in formulas (1) to (3), R1, R2 and R4 each independently represent H or CH3, and R3 and R5 each independently represent CH3 or C2H5.
    Type: Application
    Filed: September 1, 2017
    Publication date: March 8, 2018
    Inventors: Hayato Ida, Junichi Tamura, Ryuji Murayama, Takaho Shibata, Daisuke Yamashita, Takashi Hirasa
  • TONER AND METHOD FOR MANUFACTURING THE SAME
    Publication number: 20180031991
    Abstract: A toner in which the content of polysiloxane is 1% by mass or more and 15% by mass or less based on the total mass of toner particles, the polysiloxane is present in the toner as a domain of 10 nm or more and 500 nm or less, and Siloxane index (Ge)/Siloxane index (D) of the toner particles is 1.0 or less.
    Type: Application
    Filed: July 25, 2017
    Publication date: February 1, 2018
    Inventors: Daisuke Yamashita, Takaho Shibata, Hayato Ida, Junichi Tamura, Akemi Watanabe
  • Device and method of controlling lock and unlock modes of display of computer
    Patent number: 9846477
    Abstract: A method of controlling a computer including a display screen, the computer having a plurality of modes with respect to the display screen, includes: determining that the computer is set to a first lock mode after inactivity during a non-lock mode over a first time period before a second lock mode is set, the first lock mode, the second lock mode, and the non-lock mode being from among the plurality of modes; switching the computer from the first lock mode to the second lock mode when after inactivity over a second time period subsequent to the first time period; and returning, by a processor in the computer, the computer from the first lock mode to the non-lock mode when an input designating a position included in a certain area of the display screen is detected within the second time period.
    Type: Grant
    Filed: November 26, 2014
    Date of Patent: December 19, 2017
    Assignee: FUJITSU LIMITED
    Inventors: Hiroyasu Sugano, Tatsuro Matsumoto, Daisuke Yamashita
  • Mammography device
    Patent number: 9833147
    Abstract: A mammography device is disclosed. The mammography device includes a container configured to surround the breast and a plurality of optical fibers attached to be directed inward in the container and configured to perform radiation and detection of light. The container has a base member having an opening, a plurality of annular members continuously disposed to come in communication with the opening, and a bottom member disposed inside the annular member spaced the farthest distance from the base member. The annular members and the bottom member are configured to relatively displace the adjacent annular member on the side of the base member or the base member in a communication direction. Some of the plurality of optical fibers is attached to the plurality of annular members.
    Type: Grant
    Filed: November 9, 2012
    Date of Patent: December 5, 2017
    Assignee: HAMAMATSU PHOTONICS K.K.
    Inventors: Toshihiko Suzuki, Yutaka Yamashita, Yukio Ueda, Etsuko Yamaki, Daisuke Yamashita, Kenji Yoshimoto, Harumi Sakahara, Hiroyuki Ogura, Hatsuko Nasu