Patents by Inventor Yumi SAKAGUCHI

Yumi SAKAGUCHI 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).

  • METHOD OF QUANTIFICATION OF FREE SULFUR
    Publication number: 20230273181
    Abstract: Provided is a method of quantification of free sulfur that can accurately measure the free sulfur content of a rubber composition. The present disclosure relates to a method of quantification of free sulfur in a rubber composition, the method including extracting the free sulfur in the rubber composition with toluene.
    Type: Application
    Filed: February 6, 2023
    Publication date: August 31, 2023
    Applicant: SUMITOMO RUBBER INDUSTRIES, LTD.
    Inventors: Yuko IWASAKI, Yumi SAKAGUCHI, Hiroaki YAMADA
  • Tires
    Patent number: 11459448
    Abstract: Provided are tires that are excellent in tire properties such as fuel economy, abrasion resistance, wet grip performance, snow and ice performance, fracture resistance, and flex crack growth resistance. Included is a tire containing a rubber composition containing a natural rubber derived from Taraxacum kok-saghyz having a weight average molecular weight (Mw) of 5,000,000 or more and including polymers having a radius of gyration (Rz) of 130 nm or larger, wherein the Mw and Rz values are measured by FFF-MALS.
    Type: Grant
    Filed: May 28, 2020
    Date of Patent: October 4, 2022
    Assignee: SUMITOMO RUBBER INDUSTRIES, LTD.
    Inventors: Toshifumi Haba, Tatsuhiro Tanaka, Yumi Sakaguchi, Yukino Inoue, Kazuhisa Fushihara
  • TIRES
    Publication number: 20200377698
    Abstract: Provided are tires that are excellent in tire properties such as fuel economy, abrasion resistance, wet grip performance, snow and ice performance, fracture resistance, and flex crack growth resistance. Included is a tire containing a rubber composition containing a natural rubber derived from Taraxacum kok-saghyz having a weight average molecular weight (Mw) of 5,000,000 or more and including polymers having a radius of gyration (Rz) of 130 nm or larger, wherein the Mw and Rz values are measured by FFF-MALS.
    Type: Application
    Filed: May 28, 2020
    Publication date: December 3, 2020
    Applicant: SUMITOMO RUBBER INDUSTRIES, LTD.
    Inventors: Toshifumi HABA, Tatsuhiro TANAKA, Yumi SAKAGUCHI, Yukino INOUE, Kazuhisa FUSHIHARA