Patents by Inventor Masaru Kitagawa

Masaru Kitagawa 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: 11851548
    Abstract: A latex composition has a latex of a carboxyl group-containing conjugated diene rubber (A), and a plasticizer (B) having a SP value of 15 (cal/cm3)1/2 or less, wherein the content of a plasticizer (B) is 0.1 to 15 parts by weight based on 100 parts by weight of the carboxyl group-containing conjugated diene rubber (A) included in the latex.
    Type: Grant
    Filed: February 14, 2018
    Date of Patent: December 26, 2023
    Assignee: ZEON CORPORATION
    Inventors: Misa Yamamoto, Masaru Kitagawa
  • Patent number: 11236218
    Abstract: A latex composition has a latex of a carboxyl group-containing conjugated diene rubber and a metal compound including a trivalent or higher metal, wherein a content of the metal compound is 0.1 to 1.5 parts by weight, based on 100 parts by weight of the carboxyl group-containing conjugated diene rubber.
    Type: Grant
    Filed: February 24, 2017
    Date of Patent: February 1, 2022
    Assignee: ZEON CORPORATION
    Inventors: Naohiro Igari, Misa Yamamoto, Masaru Kitagawa, Shinji Kato
  • Patent number: 11065788
    Abstract: A method for producing a glove includes a step of forming a dip-molded layer by dip-molding a latex composition containing a latex of a carboxyl group-containing conjugated diene rubber (A) that does not have an isoprene-derived monomer unit, and a metal compound (B) including a divalent or higher metal, and a step of irradiating the dip-molded layer with radiation.
    Type: Grant
    Filed: February 24, 2017
    Date of Patent: July 20, 2021
    Assignee: ZEON CORPORATION
    Inventors: Misa Yamamoto, Masaru Kitagawa
  • Patent number: 11058162
    Abstract: A method for producing a glove, including a step of forming a dip-molded layer by dip-molding a latex composition containing a latex of a carboxyl group-containing conjugated diene rubber (A) and a metal compound (B) including a divalent or higher metal, and is substantially free from sulfur and/or a sulfur-containing compound as a cross-linking agent, and a step of irradiating the dip-molded layer with radiation.
    Type: Grant
    Filed: February 24, 2017
    Date of Patent: July 13, 2021
    Assignee: ZEON CORPORATION
    Inventors: Masaru Kitagawa, Misa Yamamoto
  • Patent number: 11013281
    Abstract: A method for producing a glove, including a step of forming a dip-molded layer by dip-molding a latex composition containing a latex of a carboxyl group-containing conjugated diene rubber (A) and a metal compound (B) including a divalent or higher metal, and is substantially free from sulfur and/or a sulfur-containing compound as a cross-linking agent, and a step of irradiating the dip-molded layer with radiation.
    Type: Grant
    Filed: February 24, 2017
    Date of Patent: May 25, 2021
    Assignee: ZEON CORPORATION
    Inventors: Masaru Kitagawa, Misa Yamamoto
  • Patent number: 11014270
    Abstract: A method for producing a glove includes a step of forming a dip-molded layer by dip-molding a latex composition containing a latex of a carboxyl group-containing conjugated diene rubber (A) that does not have an isoprene-derived monomer unit, and a metal compound (B) including a divalent or higher metal, and a step of irradiating the dip-molded layer with radiation.
    Type: Grant
    Filed: February 24, 2017
    Date of Patent: May 25, 2021
    Assignee: ZEON CORPORATION
    Inventors: Misa Yamamoto, Masaru Kitagawa
  • Patent number: 10899048
    Abstract: A method for producing a glove includes a step of forming a dip-molded layer by dip-molding a latex composition containing a latex of a carboxyl group-containing conjugated diene rubber (A) that does not have an isoprene-derived monomer unit, and a metal compound (B) including a divalent or higher metal, and a step of irradiating the dip-molded layer with radiation.
    Type: Grant
    Filed: February 24, 2017
    Date of Patent: January 26, 2021
    Assignee: ZEON CORPORATION
    Inventors: Misa Yamamoto, Masaru Kitagawa
  • Patent number: 10897945
    Abstract: A method for producing a glove, including a step of forming a dip-molded layer by dip-molding a latex composition containing a latex of a carboxyl group-containing conjugated diene rubber (A) and a metal compound (B) including a divalent or higher metal, and is substantially free from sulfur and/or a sulfur-containing compound as a cross-linking agent, and a step of irradiating the dip-molded layer with radiation.
    Type: Grant
    Filed: February 24, 2017
    Date of Patent: January 26, 2021
    Assignee: ZEON CORPORATION
    Inventors: Masaru Kitagawa, Misa Yamamoto
  • Publication number: 20210002453
    Abstract: A latex composition including a latex of a carboxyl group-containing conjugated diene-based rubber (A), a water-soluble metal compound (B), and a water-insoluble metal compound (C) including a transition metal of Group IV of the periodic table, wherein the metal compound (C) is present in an amount of 0.5 to 4 parts by weight relative to 100 parts by weight of the carboxyl group-containing conjugated diene-based rubber (A).
    Type: Application
    Filed: February 6, 2019
    Publication date: January 7, 2021
    Applicant: ZEON CORPORATION
    Inventor: Masaru KITAGAWA
  • Publication number: 20210001521
    Abstract: A method for producing a dip-molded article, including a dip-molding step of dip-molding a latex composition containing a latex of a carboxyl group-containing conjugated diene-based rubber (A) and a water-soluble metal compound (B) using a dip mold to form a dip-molded layer on the surface of the dip mold; a moisture content adjustment step of adjusting the moisture content of the dip-molded layer formed on the surface of the dip mold to 1 to 30 wt %; and a beading step of performing beading after the adjusting of the moisture content, the beading including peeling a portion of the dip-molded layer formed on the surface of the dip mold from the dip mold.
    Type: Application
    Filed: February 6, 2019
    Publication date: January 7, 2021
    Applicant: ZEON CORPORATION
    Inventor: Masaru KITAGAWA
  • Publication number: 20200157314
    Abstract: A latex composition has a latex of a carboxyl group-containing conjugated diene rubber (A), and a plasticizer (B) having a SP value of 15 (cal/cm3)1/2 or less, wherein the content of a plasticizer (B) is 0.1 to 15 parts by weight based on 100 parts by weight of the carboxyl group-containing conjugated diene rubber (A) included in the latex.
    Type: Application
    Filed: February 14, 2018
    Publication date: May 21, 2020
    Applicant: ZEON CORPORATION
    Inventors: Misa YAMAMOTO, Masaru KITAGAWA
  • Patent number: 10476209
    Abstract: A shield connector includes a first housing and a second housing, a first shield shell configured to cover the first housing, and a second shield shell configured to cover the second housing. The first shield shell includes a first connecting portion and the second shield shell includes a second connecting portion. An electrically conductive fastening member electrically connects the first connecting portion and the second connecting portion to each other. The first housing includes a first fixing portion, and the second housing includes a second fixing portion. The first fixing portion and the second fixing portion are held together by the fastening member in a state in which the first fixing portion and the second fixing portion are interposed between the first connecting portion and the second connecting portion.
    Type: Grant
    Filed: May 12, 2017
    Date of Patent: November 12, 2019
    Assignee: SUMITOMO WIRING SYSTEMS, LTD.
    Inventors: Masaru Kitagawa, Shinyu Nagashima, Masaki Okamoto, Yasuhiro Kudo
  • Publication number: 20190296494
    Abstract: A shield connector includes a first housing and a second housing, a first shield shell configured to cover the first housing, and a second shield shell configured to cover the second housing. The first shield shell includes a first connecting portion and the second shield shell includes a second connecting portion. An electrically conductive fastening member electrically connects the first connecting portion and the second connecting portion to each other. The first housing includes a first fixing portion, and the second housing includes a second fixing portion. The first fixing portion and the second fixing portion are held together by the fastening member in a state in which the first fixing portion and the second fixing portion are interposed between the first connecting portion and the second connecting portion.
    Type: Application
    Filed: May 12, 2017
    Publication date: September 26, 2019
    Applicant: SUMITOMO WIRING SYSTEMS, LTD.
    Inventors: Masaru KITAGAWA, Shinyu NAGASHIMA, Masaki OKAMOTO, Yasuhiro KUDO
  • Publication number: 20190177517
    Abstract: A latex composition has a latex of a carboxyl group-containing conjugated diene rubber and a metal compound including a trivalent or higher metal, wherein a content of the metal compound is 0.1 to 1.5 parts by weight, based on 100 parts by weight of the carboxyl group-containing conjugated diene rubber.
    Type: Application
    Filed: February 24, 2017
    Publication date: June 13, 2019
    Applicant: ZEON CORPORATION
    Inventors: Naohiro IGARI, Misa YAMAMOTO, Masaru KITAGAWA, Shinji KATO
  • Publication number: 20190091898
    Abstract: A method for producing a glove includes a step of forming a dip-molded layer by dip-molding a latex composition containing a latex of a carboxyl group-containing conjugated diene rubber (A) that does not have an isoprene-derived monomer unit, and a metal compound (B) including a divalent or higher metal, and a step of irradiating the dip-molded layer with radiation.
    Type: Application
    Filed: February 24, 2017
    Publication date: March 28, 2019
    Applicant: ZEON CORPORATION
    Inventors: Misa YAMAMOTO, Masaru KITAGAWA
  • Publication number: 20190045863
    Abstract: A method for producing a glove, including a step of forming a dip-molded layer by dip-molding a latex composition containing a latex of a carboxyl group-containing conjugated diene rubber (A) and a metal compound (B) including a divalent or higher metal, and is substantially free from sulfur and/or a sulfur-containing compound as a cross-linking agent, and a step of irradiating the dip-molded layer with radiation.
    Type: Application
    Filed: February 24, 2017
    Publication date: February 14, 2019
    Applicant: ZEON CORPORATION
    Inventors: Masaru KITAGAWA, Misa YAMAMOTO
  • Publication number: 20180291561
    Abstract: A method includes: forming core polymer particles by copolymerizing a monomer mixture (a); forming a first shell layer substantially surrounding the particles and not swollen by a base by copolymerizing a monomer mixture (b) in the presence of the particles; swelling the particles with a base to an aqueous dispersion containing the particles on which the layer has been formed in an amount of 0.1-30 parts by weight; and swelling the layer with a monomer mixture (c) to an aqueous dispersion containing the particles on which the layer has been formed in an amount of 0.1-45 parts by weight, in which a difference in water contents represented by (a water content in the particles on which the layer has been formed after swelling the shell)?(a water content in the particles on which the layer has been formed before swelling the shell) is 1 to 45%.
    Type: Application
    Filed: October 20, 2016
    Publication date: October 11, 2018
    Applicant: ZEON CORPORATION
    Inventor: Masaru KITAGAWA
  • Patent number: 10062974
    Abstract: A connector 10 disclosed by this specification is a connector 10 to be mounted on a casing 1 of a device by being inserted into a mounting hole 2 provided in the casing 1 and includes a terminal 40 connected to a wire W, a housing 20 having the terminal 40 mounted therein, and an intermediate terminal 30 made of metal, mounted in the housing 20 and disposed between the terminal 40 and a mating terminal 4 in the casing 1. A fastened component (nut 5) disposed in the casing 1 and to be fastened to a fastening component (bolt B), the mating terminal 4, the intermediate terminal 30 and the terminal 40 are arranged side by side in a fastening direction, and the terminal 40 and the mating terminal 4 are connected via the intermediate terminal 30 by being collectively fastened by the fastening component and the fastened component.
    Type: Grant
    Filed: April 6, 2016
    Date of Patent: August 28, 2018
    Assignee: Sumitomo Wiring Systems, Ltd
    Inventors: Masaki Okamoto, Masaaki Kobayashi, Yasushi Okayasu, Masaru Kitagawa
  • Publication number: 20180237548
    Abstract: A method for producing an aqueous dispersion of hollow polymer particles including: a core formation step wherein core polymer particles are formed by copolymerizing a monomer mixture; a first shell layer formation step wherein first shell layers that cover the particles are formed by copolymerizing a monomer mixture in the presence of the particles; a core swelling step wherein the particles are swelled by adding a base into an aqueous dispersion containing the particles, which have been provided with the first shell layers, and setting the pH of the aqueous dispersion to 7 or more; a polymerization stopping step wherein the polymerization is stopped after the core swelling step; and a shell swelling step wherein the first shell layers are swelled by adding a monomer mixture into the aqueous dispersion containing the particles, which have been provided with the first shell layers and swelled, after the polymerization stopping step.
    Type: Application
    Filed: August 18, 2016
    Publication date: August 23, 2018
    Applicant: ZEON CORPORATION
    Inventor: Masaru KITAGAWA
  • Publication number: 20180076534
    Abstract: A connector 10 disclosed by this specification is a connector 10 to be mounted on a casing 1 of a device by being inserted into a mounting hole 2 provided in the casing 1 and includes a terminal 40 connected to a wire W, a housing 20 having the terminal 40 mounted therein, and an intermediate terminal 30 made of metal, mounted in the housing 20 and disposed between the terminal 40 and a mating terminal 4 in the casing 1. A fastened component (nut 5) disposed in the casing 1 and to be fastened to a fastening component (bolt B), the mating terminal 4, the intermediate terminal 30 and the terminal 40 are arranged side by side in a fastening direction, and the terminal 40 and the mating terminal 4 are connected via the intermediate terminal 30 by being collectively fastened by the fastening component and the fastened component.
    Type: Application
    Filed: April 6, 2016
    Publication date: March 15, 2018
    Inventors: Masaki Okamoto, Masaaki Kobayashi, Yasushi Okayasu, Masaru Kitagawa