Patents by Inventor Jingo Shirasaka

Jingo Shirasaka 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).

  • Production method for unvulcanized rubber member and tire
    Publication number: 20050034802
    Abstract: A method of producing an uncured rubber member by separately producing a rubber composition A of a compounding system excluding a vulcanizing agent and a rubber composition B of a compounding system excluding a vulcanization accelerator and shaping the rubber compositions A and B into given forms through a shaping machine and winding on a rotating support does not cause the scorching at the shaping step and is high in the shaping efficiency. Also, the durability and the internal pressure holding property at a run-flat state are simultaneously established in a tire provided with an innerliner in which a rubber component for the innerliner contains at least 10% by mass of diene rubber in a region corresponding to a tire side portion and a ratio of diene rubber in a region corresponding to a tire tread portion is made lower than that in a side portion corresponding region.
    Type: Application
    Filed: October 24, 2002
    Publication date: February 17, 2005
    Inventors: Jingo Shirasaka, Tsuguyoshi Yamada, Ichiro Wada
  • Additive for rubber composition, additive composition for rubber composition, rubber composition and tire
    Patent number: 6806303
    Abstract: An additive for a rubber composition consists essentially of an ester of (i) an aliphatic polyvalent carboxylic acid with (iii) a (poly)oxyalkylene derivative, and having at least one carboxyl group in its molecule, or an ester of (ii) an aromatic polyvalent carboxylic acid with (iii) a (poly)oxyalkylene derivative, and having at least one carboxyl group bonded to an aromatic ring in its molecule. And also, it relates to an additive composition, a rubber composition and a pneumatic tire using such an additive for a rubber composition.
    Type: Grant
    Filed: August 8, 2001
    Date of Patent: October 19, 2004
    Assignees: Bridgestone Corporation, Kao Corporation
    Inventors: Daisuke Nohara, Jingo Shirasaka, Isao Nishi, Masaaki Tsuchihashi, Tetsuo Takano
  • Rubber composition
    Patent number: 6667356
    Abstract: Provided is a rubber composition comprising 100 parts by weight of a rubber component comprising at least one selected from the group consisting of natural rubber and synthetic rubbers and 0.
    Type: Grant
    Filed: November 25, 2002
    Date of Patent: December 23, 2003
    Assignees: Bridgestone Corporation, Otsuka Chemical Co., Ltd.
    Inventors: Daisuke Nohara, Jingo Shirasaka, Akinori Oka, Ken Sonogi, Hiroaki Tokuda
  • Rubber composition
    Publication number: 20030134947
    Abstract: Provided is a rubber composition comprising 100 parts by weight of a rubber component comprising at least one selected from the group consisting of natural rubber and synthetic rubbers and 0.
    Type: Application
    Filed: November 25, 2002
    Publication date: July 17, 2003
    Applicant: BRIDGESTONE CORPORATION, OTSUKA CHEMICAL CO., LTD.
    Inventors: Daisuke Nohara, Jingo Shirasaka, Akinori Oka, Ken Sonogi, Hiroaki Tokuda
  • Reclaimed rubber and process for producing the same
    Patent number: 6576680
    Abstract: Reclaimed rubber which is obtained through devulcanization and has excellent physical properties as a vulcanized material, and a process for producing the same are provided. In the reclaimed rubber obtained by devulcanizing vulcanized rubber, the proportion of sol is 80% or higher, and the peak top molecular weight of sol as determined by gel permeation chromatography (GPC) is 100,000 or less.
    Type: Grant
    Filed: February 27, 2001
    Date of Patent: June 10, 2003
    Assignee: Bridgestone Corporation
    Inventors: Nobumitsu Ohshima, Jingo Shirasaka, Setsuo Akiyama
  • Rubber composition
    Patent number: 6515055
    Abstract: Provided is a rubber composition comprising 100 parts by weight of a rubber component comprising at least one selected from the group consisting of natural rubber and synthetic rubbers and 0.
    Type: Grant
    Filed: November 17, 2000
    Date of Patent: February 4, 2003
    Assignees: Bridgestone Corporation, Otsuka Chemical Co., Ltd.
    Inventors: Daisuke Nohara, Jingo Shirasaka, Akinori Oka, Ken Sonogi, Hiroaki Tokuda
  • Additive for rubber composition, additive composition for rubber composition, rubber composition and tire
    Publication number: 20020042462
    Abstract: An additive for a rubber composition consists essentially of an ester of (i) an aliphatic polyvalent carboxylic acid with (iii) a (poly)oxyalkylene derivative, and having at least one carboxyl group in its molecule, or an ester of (ii) an aromatic polyvalent carboxylic acid with (iii) a (poly)oxyalkylene derivative, and having at least one carboxyl group bonded to an aromatic ring in its molecule. And also, it relates to an additive composition, a rubber composition and a pneumatic tire using such an additive for a rubber composition.
    Type: Application
    Filed: August 8, 2001
    Publication date: April 11, 2002
    Applicant: BRIDGESTONE CORPORATION
    Inventors: Daisuke Nohara, Jingo Shirasaka, Isao Nishi, Masaaki Tsuchihashi, Tetsuo Takano
  • Reclaimed rubber and process for producing the same
    Publication number: 20010025060
    Abstract: Reclaimed rubber which is obtained through devulcanization and has excellent physical properties as a vulcanized material, and a process for producing the same are provided. In the reclaimed rubber obtained by devulcanizing vulcanized rubber, the proportion of sol is 80% or higher, and the peak top molecular weight of sol as determined by gel permeation chromatography (GPC) is 100,000 or less.
    Type: Application
    Filed: February 27, 2001
    Publication date: September 27, 2001
    Inventors: Nobumitsu Ohshima, Jingo Shirasaka, Setsuo Akiyama