Patents by Inventor Akira Tsukada

Akira Tsukada 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: 10340579
    Abstract: An attachment instrument for an electronic device (10) includes a first angle adjustment part (30) configured to adjust an orientation of an antenna included in the electronic device (10) by two arc-shaped long holes (31a, 31b) formed in a plane and two axes (32a, 32b) moving inside the two long (31a, 31b), respectively. The first angle adjustment part (30) makes the adjustment by the axis (32a) inside one of the long holes (31a) being fixed and the axis (32b) inside the other one of the long holes (31b) being allowed to move.
    Type: Grant
    Filed: January 6, 2016
    Date of Patent: July 2, 2019
    Assignee: NEC CORPORATION
    Inventor: Akira Tsukada
  • Patent number: 10266628
    Abstract: A nitrile copolymer rubber composition including a nitrile copolymer rubber (A) containing 35 to 80 wt % of ?,?-ethylenically unsaturated nitrile monomer units (a1), 19.5 to 64.5 wt % of conjugated diene monomer units (a2), and 0.5 to 20 wt % of ?,?-ethylenically unsaturated carboxylic acid monomer units (a3) and an inorganic filler (B) with an aspect ratio of 30 to 2,000, wherein a content of the inorganic filler (B) with respect to 100 parts by weight of the nitrile copolymer rubber (A) is 1 to 200 parts by weight is provided.
    Type: Grant
    Filed: March 24, 2015
    Date of Patent: April 23, 2019
    Assignee: ZEON CORPORATION
    Inventors: Akira Tsukada, Tadashi Nakamura
  • Patent number: 10005895
    Abstract: A cross-linked rubber product for a fuel seal is obtained by cross-linking a nitrile rubber composition including a nitrile rubber (A) containing 25 to 80% by weight of ?,?-ethylenically unsaturated nitrile monomer units (a1), 20 to 75% by weight of conjugated diene monomer units (a2), and 0 to 30% by weight of cationic monomer units and/or monomer units capable of forming a cation (a3), and having a compression set ratio of 20% or less after being compressed in an atmosphere of 100° C. for 70 hours, and an inorganic filler (B) having an aspect ratio of 30 to 2,000. The content of the inorganic filler (B) is from 1 to 200 parts by weight with respect to 100 parts by weight of the nitrile rubber (A). The cross-linked rubber product is obtained by subjecting the nitrile rubber composition to secondary vulcanization at 100 to 150° C. for 1 to 24 hours.
    Type: Grant
    Filed: February 10, 2016
    Date of Patent: June 26, 2018
    Assignee: ZEON CORPORATION
    Inventor: Akira Tsukada
  • Publication number: 20180115047
    Abstract: An attachment instrument for an electronic device (10) includes a first angle adjustment part (30) configured to adjust an orientation of an antenna included in the electronic device (10) by two arc-shaped long holes (31a, 31b) formed in a plane and two axes (32a, 32b) moving inside the two long (31a, 31b), respectively. The first angle adjustment part (30) makes the adjustment by the axis (32a) inside one of the long holes (31a) being fixed and the axis (32b) inside the other one of the long holes (31b) being allowed to move.
    Type: Application
    Filed: January 6, 2016
    Publication date: April 26, 2018
    Applicant: NEC Corporation
    Inventor: Akira TSUKADA
  • Patent number: 9926445
    Abstract: A nitrile copolymer rubber composition containing a nitrile copolymer rubber (A) which contains ?,?-ethylenically unsaturated nitrile monomer units (a1) 15 to 80 wt %, conjugated diene monomer units (a2) 20 to 85 wt %, and cationic monomer units and/or monomer units able to form cations (a3) 0 to 30 wt %, and flat cellulose particles (B) with an aspect ratio of 30 to 600, wherein a content of the flat cellulose particles (B) is 1 to 200 parts by weight with respect to 100 parts by weight of the nitrile copolymer rubber (A) is provided.
    Type: Grant
    Filed: December 19, 2013
    Date of Patent: March 27, 2018
    Assignee: ZEON CORPORATION
    Inventor: Akira Tsukada
  • Publication number: 20180016423
    Abstract: A cross-linked rubber product for a fuel seal is obtained by cross-linking a nitrile rubber composition including a nitrile rubber (A) containing 25 to 80% by weight of ?,?-ethylenically unsaturated nitrile monomer units (a1), 20 to 75% by weight of conjugated diene monomer units (a2), and 0 to 30% by weight of cationic monomer units and/or monomer units capable of forming a cation (a3), and having a compression set ratio of 20% or less after being compressed in an atmosphere of 100° C. for 70 hours, and an inorganic filler (B) having an aspect ratio of 30 to 2,000. The content of the inorganic filler (B) is from 1 to 200 parts by weight with respect to 100 parts by weight of the nitrile rubber (A). The cross-linked rubber product is obtained by subjecting the nitrile rubber composition to secondary vulcanization at 100 to 150° C. for 1 to 24 hours.
    Type: Application
    Filed: February 10, 2016
    Publication date: January 18, 2018
    Applicant: ZEON CORPORATION
    Inventor: Akira TSUKADA
  • Publication number: 20170101498
    Abstract: A nitrile copolymer rubber composition including a nitrile copolymer rubber (A) containing 35 to 80 wt % of ?,?-ethylenically unsaturated nitrile monomer units (a1), 19.5 to 64.5 wt % of conjugated diene monomer units (a2), and 0.5 to 20 wt % of ?,?-ethylenically unsaturated carboxylic acid monomer units (a3) and an inorganic filler (B) with an aspect ratio of 30 to 2,000, wherein a content of the inorganic filler (B) with respect to 100 parts by weight of the nitrile copolymer rubber (A) is 1 to 200 parts by weight is provided.
    Type: Application
    Filed: March 24, 2015
    Publication date: April 13, 2017
    Applicant: ZEON CORPORATION
    Inventors: Akira TSUKADA, Tadashi NAKAMURA
  • Publication number: 20150322254
    Abstract: A nitrile copolymer rubber composition containing a nitrile copolymer rubber (A) which contains ?,?-ethylenically unsaturated nitrile monomer units (a1) 15 to 80 wt %, conjugated diene monomer units (a2) 20 to 85 wt %, and cationic monomer units and/or monomer units able to form cations (a3) 0 to 30 wt %, and flat cellulose particles (B) with an aspect ratio of 30 to 600, wherein a content of the flat cellulose particles (B) is 1 to 200 parts by weight with respect to 100 parts by weight of the nitrile copolymer rubber (A) is provided.
    Type: Application
    Filed: December 19, 2013
    Publication date: November 12, 2015
    Inventor: Akira TSUKADA
  • Publication number: 20150099841
    Abstract: A method of production of a nitrile copolymer rubber composition which contains a nitrile copolymer rubber, layered inorganic filler, vinyl chloride resin, and plasticizer including the steps of adding, to an aqueous dispersion of a vinyl chloride resin, 10 to 100 wt % of the total amount of plasticizer which is used and 0 to 100 wt % of the total amount of layered inorganic filler which is used to prepare an aqueous dispersion of a vinyl chloride resin which contains a plasticizer (A) and mixing an aqueous dispersion of a nitrile copolymer rubber (B) which may contain a plasticizer and/or layered inorganic filler and the aqueous dispersion of a vinyl chloride resin (A), then causing them to coagulate to form crumbs and filtering and drying the same is provided.
    Type: Application
    Filed: March 7, 2013
    Publication date: April 9, 2015
    Inventors: Akira Tsukada, Tomoyuki Shibuya, Yoshihisa Takeyama, Tadashi Nakamura
  • Patent number: 8927640
    Abstract: A nitrile copolymer latex composition containing a latex of a nitrile copolymer rubber (A) having ?,?-ethylenically unsaturated nitrile monomer units in 10 to 75 wt %, conjugated diene monomer units in 5 to 89.9 wt %, and cationic monomer units and/or monomer units able to form cations in 0.1 to 20 wt %, an inorganic filler (B) having an aspect ratio of 30 to 2,000, and a plasticizer (C) having an SP value by the HOY method of 8 to 10.2 (cal/cm3)1/2, wherein a content of said plasticizer (C) is 0.1 to 200 parts by weight with respect to said nitrile copolymer rubber (A) as 100 parts by weight is provided.
    Type: Grant
    Filed: December 12, 2013
    Date of Patent: January 6, 2015
    Assignee: Zeon Corporation
    Inventors: Akira Tsukada, Kazuhiro Ejiri, Chikara Katano
  • Publication number: 20140296404
    Abstract: A crosslinkable rubber composition comprising 0.2 to 10 parts by weight of an aromatic secondary amine-based anti-aging agent and 0.5 to 20 parts by weight of a polyamine-based crosslinking agent with respect to 100 parts by weight of a nitrile rubber including an ?,?-ethylenically unsaturated nitrile unit and an ?,?-ethylenically unsaturated dicarboxylic acid monoester unit, and with iodine value of 120 or less. The present invention can provide a crosslinkable rubber composition, providable of a cross-linked rubber excellent in a variety of properties such as mechanical strength and small in compression set, and a cross-linked rubber obtained by cross-linking the rubber composition.
    Type: Application
    Filed: June 17, 2014
    Publication date: October 2, 2014
    Inventors: Hiroyasu NAGAMORI, Shigeru FUJITA, Kiyonori UMETSU, SR., Akira TSUKADA
  • Publication number: 20140220279
    Abstract: A nitrile copolymer rubber composition containing a nitrile copolymer rubber (A) which contains ?,?-ethylenically unsaturated nitrile monomer units (a1) 35 to 85 wt %, conjugated diene monomer units which may be at least partially hydrogenated (a2) 15 to 65 wt %, cationic monomer units (a3) 0 to 30 wt %, and aromatic vinyl monomer units (a4) 0 to 50 wt %, the total content of the ?,?-ethylenically unsaturated nitrile monomer units (a1) and the aromatic vinyl monomer units (a4) being 35 to 85 wt %, a vinyl chloride resin (B), and a plasticizer (C) with a specific structure is provided.
    Type: Application
    Filed: September 21, 2012
    Publication date: August 7, 2014
    Inventors: Akira Tsukada, Yoshihisa Takeyama
  • Patent number: 8785530
    Abstract: A crosslinkable rubber composition comprising 0.2 to 10 parts by weight of an aromatic secondary amine-based anti-aging agent and 0.5 to 20 parts by weight of a polyamine-based crosslinking agent with respect to 100 parts by weight of a nitrile rubber including an ?,?-ethylenically unsaturated nitrile unit and an ?,?-ethylenically unsaturated dicarboxylic acid monoester unit, and with iodine value of 120 or less. The present invention can provide a crosslinkable rubber composition, providable of a cross-linked rubber excellent in a variety of properties such as mechanical strength and small in compression set, and a cross-linked rubber obtained by cross-linking the rubber composition.
    Type: Grant
    Filed: December 14, 2012
    Date of Patent: July 22, 2014
    Assignee: Zeon Corporation
    Inventors: Hiroyasu Nagamori, Shigeru Fujita, Kiyonori Umetsu, Akira Tsukada
  • Publication number: 20140100315
    Abstract: A nitrile copolymer latex composition containing a latex of a nitrile copolymer rubber (A) having ?,?-ethylenically unsaturated nitrile monomer units in 10 to 75 wt %, conjugated diene monomer units in 5 to 89.9 wt %, and cationic monomer units and/or monomer units able to form cations in 0.1 to 20 wt %, an inorganic filler (B) having an aspect ratio of 30 to 2,000, and a plasticizer (C) having an SP value by the HOY method of 8 to 10.2 (cal/cm3)1/2, wherein a content of said plasticizer (C) is 0.1 to 200 parts by weight with respect to said nitrile copolymer rubber (A) as 100 parts by weight is provided.
    Type: Application
    Filed: December 12, 2013
    Publication date: April 10, 2014
    Applicant: ZEON CORPORATION
    Inventors: Akira TSUKADA, Kazuhiro EJIRI, Chikara KATANO
  • Patent number: 8648137
    Abstract: A nitrile copolymer latex composition containing a latex of a nitrile copolymer rubber (A) having ?,?-ethylenically unsaturated nitrile monomer units in 10 to 75 wt %, conjugated diene monomer units in 5 to 89.9 wt %, and cationic monomer units and/or monomer units able to form cations in 0.1 to 20 wt %, an inorganic filler (B) having an aspect ratio of 30 to 2,000, and a plasticizer (C) having an SP value by the HOY method of 8 to 10.2 (cal/cm3)1/2, wherein a content of said plasticizer (C) is 0.1 to 200 parts by weight with respect to said nitrile copolymer rubber (A) as 100 parts by weight is provided.
    Type: Grant
    Filed: January 29, 2009
    Date of Patent: February 11, 2014
    Assignee: Zeon Corporation
    Inventors: Akira Tsukada, Kazuhiro Ejiri, Chikara Katano
  • Patent number: 8362121
    Abstract: A crosslinkable rubber composition comprising 0.2 to 10 parts by weight of an aromatic secondary amine-based anti-aging agent and 0.5 to 20 parts by weight of a polyamine-based crosslinking agent with respect to 100 parts by weight of a nitrile rubber including an ?,?-ethylenically unsaturated nitrile unit and an ?,?-ethylenically unsaturated dicarboxylic acid monoester unit, and with iodine value of 120 or less. The present invention can provide a crosslinkable rubber composition, providable of a cross-linked rubber excellent in a variety of properties such as mechanical strength and small in compression set, and a cross-linked rubber obtained by cross-linking the rubber composition.
    Type: Grant
    Filed: March 5, 2012
    Date of Patent: January 29, 2013
    Assignee: Zeon Corporation
    Inventors: Hiroyasu Nagamori, Shigeru Fujita, Kiyonori Umetsu, Akira Tsukada
  • Publication number: 20120172509
    Abstract: A crosslinkable rubber composition comprising 0.2 to 10 parts by weight of an aromatic secondary amine-based anti-aging agent and 0.5 to 20 parts by weight of a polyamine-based crosslinking agent with respect to 100 parts by weight of a nitrile rubber including an ?,?-ethylenically unsaturated nitrile unit and an ?,?-ethylenically unsaturated dicarboxylic acid monoester unit, and with iodine value of 120 or less. The present invention can provide a crosslinkable rubber composition, providable of a cross-linked rubber excellent in a variety of properties such as mechanical strength and small in compression set, and a cross-linked rubber obtained by cross-linking the rubber composition.
    Type: Application
    Filed: March 5, 2012
    Publication date: July 5, 2012
    Inventors: Hiroyasu NAGAMORI, Schigeru Fujita, Kiyonori Umetsu, Akira Tsukada
  • Patent number: 8153712
    Abstract: A crosslinkable rubber composition comprising 0.2 to 10 parts by weight of an aromatic secondary amine-based anti-aging agent and 0.5 to 20 parts by weight of a polyamine-based crosslinking agent with respect to 100 parts by weight of a nitrile rubber including an ?,?-ethylenically unsaturated nitrile unit and an ?,?-ethylenically unsaturated dicarboxylic acid monoester unit, and with iodine value of 120 or less. The present invention can provide a crosslinkable rubber composition, providable of a cross-linked rubber excellent in a variety of properties such as mechanical strength and small in compression set, and a cross-linked rubber obtained by cross-linking the rubber composition.
    Type: Grant
    Filed: December 21, 2006
    Date of Patent: April 10, 2012
    Assignee: Zeon Corporation
    Inventors: Hiroyasu Nagamori, Shigeru Fujita, Kiyonori Umetsu, Akira Tsukada
  • Patent number: 8044147
    Abstract: A nitrile group-containing copolymer rubber comprising 10 to 40 wt % of ?,?-ethylenically unsaturated nitrile unit (a), 10 to 60 wt % of ?,?-ethylenically unsaturated carboxylic acid ester unit (b), and 20 to 70 wt % in total of conjugated diene unit (c) and saturated conjugated diene unit (d), wherein a content ratio “x” of a conjugated diene unit (c) based on the total content of said conjugated diene unit (c) and said saturated conjugated diene unit (d) is 0.08 or smaller, and “x·A” defined as a product of said ratio “x” and a content ratio “A” (%) of said ?,?-ethylenically unsaturated nitrile unit (a) is 1.5 or smaller. According to the present invention, a nitrile group-containing copolymer rubber capable to provide a rubber vulcanizate highly balanced in mechanical strength, heat aging resistance, oil resistance, cold resistance and ozone resistance, and a vulcanizable rubber composition using the rubber can be provided.
    Type: Grant
    Filed: February 22, 2006
    Date of Patent: October 25, 2011
    Assignee: Zeon Corporation
    Inventors: Hiroyasu Nagamori, Akira Tsukada, Takafumi Kawanaka
  • Publication number: 20100330319
    Abstract: A nitrile copolymer latex composition containing a latex of a nitrile copolymer rubber (A) having ?,?-ethylenically unsaturated nitrile monomer units in 10 to 75 wt %, conjugated diene monomer units in 5 to 89.9 wt %, and cationic monomer units and/or monomer units able to form cations in 0.1 to 20 wt %, an inorganic filler (B) having an aspect ratio of 30 to 2,000, and a plasticizer (C) having an SP value by the HOY method of 8 to 10.2 (cal/cm3)1/2, wherein a content of said plasticizer (C) is 0.1 to 200 parts by weight with respect to said nitrile copolymer rubber (A) as 100 parts by weight is provided.
    Type: Application
    Filed: January 29, 2009
    Publication date: December 30, 2010
    Inventors: Akira Tsukada, Kazuhiro Ejiri, Chikara Katano