Patents by Inventor Tomoko Nakagawa

Tomoko Nakagawa 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).

  • Publication number: 20240110071
    Abstract: Provided is a UV-curable water-based ink excellent in coating film performance, especially alcohol resistance and scratch resistance. The UV-curable water-based ink includes at least a UV-curable oligomer, a colorant, and a mercapto compound, in which the UV-curable oligomer has a structural unit derived from a compound represented by the following chemical formula.
    Type: Application
    Filed: October 23, 2023
    Publication date: April 4, 2024
    Applicant: Mitsubishi Chemical Corporation
    Inventors: Tamae Karasawa, Keisuke Inaba, Tomoko Nakagawa, Shuhei Sakatani, Kengo Kasai
  • Publication number: 20240052184
    Abstract: Provided is a UV-curable water-based ink including at least a UV-curable oligomer, a colorant, and a water-soluble polyfunctional (meth)acrylamide compound, in which the UV-curable oligomer has a structural unit derived from a water-soluble compound and a structural unit derived from a compound containing two or more polymerizable unsaturated bonds.
    Type: Application
    Filed: October 23, 2023
    Publication date: February 15, 2024
    Applicant: Mitsubishi Chemical Corporation
    Inventors: Tamae Karasawa, Keisuke Inaba, Tomoko Nakagawa, Shuhei Sakatani, Kengo Kasai
  • Publication number: 20220282106
    Abstract: Provided is an ink for inkjet printing having high environmental safety, well satisfying characteristics required for a printing ink for a commercial inkjet printer such as high image quality performance, high coating performance, high-speed printability, and substrate versatility in a well-balanced manner, and having good pigment dispersion stability. The ultraviolet-curable water-based inkjet-printing ink contains at least an ultraviolet curable oligomer and a colorant. The ultraviolet-curable oligomer includes a structural unit derived from a polyisocyanate compound (A), a structural unit derived from a compound (B?) shown below, and a structural unit derived from a compound (C?) shown below. Compound (B?): a compound having two or more polymerizable unsaturated bonds and capable of bonding with the polyisocyanate compound (A) Compound (C?): a water-soluble compound capable of bonding with the polyisocyanate compound (A).
    Type: Application
    Filed: May 27, 2022
    Publication date: September 8, 2022
    Applicant: Mitsubishi Chemical Corporation
    Inventors: Keisuke Inaba, Tomoko Nakagawa, Tamae Karasawa, Aiko Ito, Tetsuharu Yuge, Atsushi Tsujimoto, Shuhei Sakatani
  • Patent number: 11194261
    Abstract: The present invention relates to an electrostatic charge image developing toner having a ratio of TP2/TP1 of 1.47 to 2.35, wherein a first measurement value of a tan ? maximal value measured in 40° C. to 80° C. by a rheometer is set as the TP1, and a second measurement value of a tan ? maximal value measured in 40° C. to 80° C. by the rheometer is set as the TP2.
    Type: Grant
    Filed: December 16, 2019
    Date of Patent: December 7, 2021
    Assignee: Mitsubishi Chemical Corporation
    Inventors: Masaya Ota, Tomoko Nakagawa, Yuki Narukawa, Masaaki Okamoto
  • Patent number: 10725392
    Abstract: The present invention relates to an electrostatic charge image developing toner, wherein when a tan ? measurement is performed twice by a rheometer, in the first measurement, a tan ? value measured at 130° C. is set as TP1 (130° C.), and a tan ? value measured at 140° C. is set as TP1 (140° C.), in the second measurement, a tan ? value measured at 140° C. is set as TP2 (140° C.), TP2 (140° C.)/TP1(140° C.) is equal to or smaller than 0.95, and TP1 (130° C.) is equal to or greater than 2.5.
    Type: Grant
    Filed: July 19, 2019
    Date of Patent: July 28, 2020
    Assignee: Mitsubishi Chemical Corporation
    Inventors: Kumiko Kameya, Tomoko Nakagawa, Yuki Narukawa, Masaya Ota, Tetsuharu Yuge
  • Publication number: 20200117108
    Abstract: The present invention relates to an electrostatic charge image developing toner having a ratio of TP2/TP1 of 1.47 to 2.35, wherein a first measurement value of a tan ? maximal value measured in 40° C. to 80° C. by a rheometer is set as the TP1, and a second measurement value of a tan ? maximal value measured in 40° C. to 80° C. by the rheometer is set as the TP2.
    Type: Application
    Filed: December 16, 2019
    Publication date: April 16, 2020
    Applicant: Mitsubishi Chemical Corporation
    Inventors: Masaya OTA, Tomoko NAKAGAWA, Yuki NARUKAWA, Masaaki OKAMOTO
  • Patent number: 10551755
    Abstract: The present invention relates to an electrostatic charge image developing toner having a ratio of TP2/TP1 of 1.47 to 2.35, wherein a first measurement value of a tan ? maximal value measured in 40° C. to 80° C. by a rheometer is set as the TP1, and a second measurement value of a tan ? maximal value measured in 40° C. to 80° C. by the rheometer is set as the TP2.
    Type: Grant
    Filed: June 26, 2018
    Date of Patent: February 4, 2020
    Assignee: Mitsubishi Chemical Corporation
    Inventors: Masaya Ota, Tomoko Nakagawa, Yuki Narukawa, Masaaki Okamoto
  • Publication number: 20190339630
    Abstract: The present invention relates to an electrostatic charge image developing toner, wherein when a tan ? measurement is performed twice by a rheometer, in the first measurement, a tan ? value measured at 130° C. is set as TP1 (130° C.), and a tan ? value measured at 140° C. is set as TP1 (140° C.), in the second measurement, a tan ? value measured at 140° C. is set as TP2 (140° C.), TP2 (140° C.)/TP1(140° C.) is equal to or smaller than 0.95, and TP1 (130° C.) is equal to or greater than 2.5.
    Type: Application
    Filed: July 19, 2019
    Publication date: November 7, 2019
    Applicant: Mitsubishi Chemical Corporation
    Inventors: Kumiko KAMEYA, Tomoko Nakagawa, Yuki Narukawa, Masaya Ota, Tetsuharu Yuge
  • Publication number: 20180299800
    Abstract: The present invention relates to an electrostatic charge image developing toner having a ratio of TP2/TP1 of 1.47 to 2.35, wherein a first measurement value of a tan ? maximal value measured in 40° C. to 80° C. by a rheometer is set as the TP1, and a second measurement value of a tan ? maximal value measured in 40° C. to 80° C. by the rheometer is set as the TP2.
    Type: Application
    Filed: June 26, 2018
    Publication date: October 18, 2018
    Applicant: Mitsubishi Chemical Corporation
    Inventors: Masaya OTA, Tomoko NAKAGAWA, Yuki NARUKAWA, Masaaki OKAMOTO
  • Patent number: 9612544
    Abstract: The object of the present invention is to provide an electrostatic image developing toner excellent in providing high image quality and excellent in low-temperature fixation performance and environmental stability. The present invention is an electrostatic image developing toner having a toner base particle containing at least a binder resin and a colorant, and an external additive, wherein the toner base particle has a core-shell structure having a core particle and a shell layer, the toner base particle has a resin coating layer of a water-soluble resin on the surface of the core particle, and has the shell layer on the resin coating layer.
    Type: Grant
    Filed: February 26, 2016
    Date of Patent: April 4, 2017
    Assignee: MITSUBISHI CHEMICAL CORPORATION
    Inventors: Tomoko Nakagawa, Akihiko Yanagibori
  • Publication number: 20160179025
    Abstract: The object of the present invention is to provide an electrostatic image developing toner excellent in providing high image quality and excellent in low-temperature fixation performance and environmental stability. The present invention is an electrostatic image developing toner having a toner base particle containing at least a binder resin and a colorant, and an external additive, wherein the toner base particle has a core-shell structure having a core particle and a shell layer, the toner base particle has a resin coating layer of a water-soluble resin on the surface of the core particle, and has the shell layer on the resin coating layer.
    Type: Application
    Filed: February 26, 2016
    Publication date: June 23, 2016
    Applicant: MITSUBISHI CHEMICAL CORPORATION
    Inventors: Tomoko NAKAGAWA, Akihiko YANAGIBORI
  • Patent number: 8273509
    Abstract: To realize an electrophotographic photoreceptor excellent in abrasion resistance, the photosensitive layer of the photoreceptor comprises a polyester resin containing a repeating structural unit represented by the formula (1) and a hydrazone compound. (In the formula (1), Ar1 to Ar4 each represents, independently of each other, an arylene group which may have a substituent. X1 represents a bivalent group (including a single bond) and X2 represents a bivalent group (including a single bond) with 3 or less atoms.
    Type: Grant
    Filed: January 9, 2007
    Date of Patent: September 25, 2012
    Assignee: Mitsubishi Chemical Corporation
    Inventors: Yuka Nagao, Tadashi Mizushima, Masami Tsurumori, Tomoko Nakagawa, Hiroaki Takamura, Shunichirou Kurihara, Tooru Uenaka, Masayuki Hiroi
  • Publication number: 20090232551
    Abstract: To realize an electrophotographic photoreceptor excellent in abrasion resistance, the photosensitive layer of the photoreceptor comprises a polyester resin containing a repeating structural unit represented by the formula (1) and a hydrazone compound. (In the formula (1), Ar1 to Ar4 each represents, independently of each other, an arylene group which may have a substituent. X1 represents a bivalent group (including a single bond) and X2 represents a bivalent group (including a single bond) with 3 or less atoms.
    Type: Application
    Filed: January 9, 2007
    Publication date: September 17, 2009
    Applicant: MITSUBISHI CHEMICAL CORPORATION
    Inventors: Yuka Nagao, Tadashi Mizushima, Masami Tsurumori, Tomoko Nakagawa, Hiroaki Takamura, Shunichirou Kurihara, Tooru Uenaka, Masayuki Hiroi
  • Publication number: 20080248011
    Abstract: The present invention provides HIDE1 as novel monocyte markers. Since HIDE1 are membrane proteins, monocytes can be specifically detected by using antibodies that bind to HIDE1. Further, HIDE1-positive monocytes can also be collected from peripheral blood or the like using a cell sorter, magnet, or such. Monocytes that can be prepared based on the present invention are useful in cell immunotherapy.
    Type: Application
    Filed: January 25, 2005
    Publication date: October 9, 2008
    Applicant: MEDICAL AND BIOLOGICAL LABORATORIES CO., LTD.
    Inventors: Tomoko Nakagawa, Shunsuke Kurei, Shingo Toji, Ayako Okabe, Motoki Kuhara, Yoshiro Kishi, Ichiro Yahara
  • Patent number: 6785055
    Abstract: A zoom lens system has, in order from an enlargement side, a first lens unit having negative optical power, a second lens unit having positive optical power, a third lens unit having positive optical power, a fourth lens unit having negative optical power, including an aperture stop, a fifth lens unit having positive or negative optical power, and a sixth lens unit having positive optical power. Zooming is achieved by varying the first to fifth variable distances between the lens units. The third and fifth lens units move from the enlargement side to the reduction side during zooming from the telephoto end to the wide-angle end. The zoom lens system is substantially telecentric toward the reduction side.
    Type: Grant
    Filed: May 16, 2002
    Date of Patent: August 31, 2004
    Assignee: Minolta Co. Ltd.
    Inventors: Jun Nishikawa, Tomoko Nakagawa
  • Publication number: 20030103268
    Abstract: A zoom lens system has, from an enlargement side, a first lens unit having a negative optical power, a second lens unit having a positive optical power and disposed on the image side of the first lens unit with a first variable distance secured in between, a third lens unit having a positive optical power and disposed on the image side of the second lens unit with a second variable distance secured in between, a fourth lens unit having a negative optical power, disposed on the image side of the third lens unit with a third variable distance secured in between, and including an aperture stop, a fifth lens unit having a positive or negative optical power and disposed on the image side of the fourth lens unit with a fourth variable distance secured in between, and a sixth lens unit having a positive optical power and disposed on the image side of the fifth lens unit with a fifth variable distance secured in between. Zooming is achieved by varying the first to fifth variable distances.
    Type: Application
    Filed: May 16, 2002
    Publication date: June 5, 2003
    Inventors: Jun Nishikawa, Tomoko Nakagawa
  • Patent number: 6558007
    Abstract: An illumination optical system has a light source, an integrator for making the intensity distribution of the light from the light source even, and a relay optical system for imaging the light from the integrator on a plane conjugate with the exit surface of the integrator. The relay optical system includes a rear lens unit of which the refractive power is asymmetrical in one direction so that the plane on which the light is imaged is inclined relative to the optical axis of the relay optical system. This makes it possible to direct light to an inclined surface with an even intensity distribution and with minimum loss of the illumination light.
    Type: Grant
    Filed: January 28, 2002
    Date of Patent: May 6, 2003
    Assignee: Minolta Co., Ltd.
    Inventors: Tomoko Nakagawa, Shigeru Sawamura, Katsuhiro Takamoto
  • Publication number: 20020149939
    Abstract: An illumination optical system has a light source, an integrator for making the intensity distribution of the light from the light source even, and a relay optical system for imaging the light from the integrator on a plane conjugate with the exit surface of the integrator. The relay optical system includes a rear lens unit of which the refractive power is asymmetrical in one direction so that the plane on which the light is imaged is inclined relative to the optical axis of the relay optical system. This makes it possible to direct light to an inclined surface with an even intensity distribution and with minimum loss of the illumination light.
    Type: Application
    Filed: January 28, 2002
    Publication date: October 17, 2002
    Applicant: Minolta Co., Ltd
    Inventors: Tomoko Nakagawa, Shigeru Sawamura, Katsuhiro Takamoto
  • Patent number: D652842
    Type: Grant
    Filed: February 16, 2010
    Date of Patent: January 24, 2012
    Assignee: Panasonic Corporation
    Inventors: Tomoko Obama, Takanori Ogawa, Tomoko Nakagawa