Patents by Inventor Shogo HIRAO

Shogo HIRAO 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).

  • RUBBER COMPOSITION AND PNEUMATIC TIRE
    Publication number: 20220220287
    Abstract: The purpose is to provide rubber compositions and pneumatic tires which have reduced changes in tan ? over time. The present invention relates to rubber compositions containing at least one copolymer obtained by copolymerizing an aromatic vinyl compound and a conjugated diene compound, the rubber compositions having a heat aging resistance index defined by equation (1) of 2.0 or less.
    Type: Application
    Filed: October 15, 2019
    Publication date: July 14, 2022
    Applicant: Sumitomo Rubber Industries, Ltd.
    Inventors: Ryota KITAGO, Rie YASUDA, Shogo HIRAO
  • RUBBER COMPOSITION AND PNEUMATIC TIRE
    Publication number: 20220119626
    Abstract: The purpose is to provide rubber compositions and pneumatic tires which have reduced changes in complex modulus E* over time. The present invention relates to rubber compositions containing at least one copolymer obtained by copolymerizing an aromatic vinyl compound and a conjugated diene compound, the rubber compositions having a heat aging resistance index defined by equation (1) of 27 or less.
    Type: Application
    Filed: October 15, 2019
    Publication date: April 21, 2022
    Applicant: Sumitomo Rubber Industries, Ltd.
    Inventors: Ryota KITAGO, Rie YASUDA, Shogo HIRAO
  • RUBBER COMPOSITION AND PNEUMATIC TIRE
    Publication number: 20220017729
    Abstract: The purpose is to provide rubber compositions and pneumatic tires which have reduced changes in hardness over time. The present invention relates to a rubber composition containing a copolymer obtained by copolymerizing an aromatic vinyl compound and a conjugated diene compound, the rubber composition having a heat aging resistance index defined by equation (1) of 10 or less.
    Type: Application
    Filed: October 15, 2019
    Publication date: January 20, 2022
    Applicant: Sumitomo Rubber Industries, Ltd.
    Inventors: Ryota KITAGO, Rie YASUDA, Shogo HIRAO
  • RUBBER COMPOSITION AND PNEUMATIC TIRE
    Publication number: 20210371628
    Abstract: The purpose is to provide rubber compositions and pneumatic tires which have reduced changes in tan ? peak temperature over time. The present invention relates to rubber compositions containing at least one copolymer obtained by copolymerizing an aromatic vinyl compound and a conjugated diene compound, the rubber compositions having a heat aging resistance index defined by equation (1) of 0.45 or less.
    Type: Application
    Filed: October 15, 2019
    Publication date: December 2, 2021
    Applicant: Sumitomo Rubber Industries, Ltd.
    Inventors: Ryota KITAGO, Rie YASUDA, Shogo HIRAO