Patents by Inventor Kazutaka Tsuchida

Kazutaka Tsuchida 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).

  • Publication number: 20230033819
    Abstract: It could be helpful to provide a rubber composition that can achieve both reinforcement property and low loss property at a high level. In order to solve the aforementioned problems, the disclosure is a rubber composition comprising a rubber component, carbon black, and silica, wherein the silica has a CTAB adsorption specific surface area of 250 m2/g or more; the silica has a diameter in the form of aggregates (DCPS) and a primary particle diameter (DI), as measured by disk centrifugal particle size analysis, that satisfy: 700?DCPS3/DI3?300 (1); the rubber component contains at least one selected from natural rubber and polyisoprene rubber, and at least one selected from modified butadiene rubber and modified styrene butadiene rubber; and the carbon black is contained by a mass ratio of 70% or more with respect to the total mass content of the carbon black and the silica.
    Type: Application
    Filed: December 17, 2020
    Publication date: February 2, 2023
    Inventor: Kazutaka TSUCHIDA
  • Publication number: 20130303681
    Abstract: The natural rubber of the present invention is obtained by gelatinizing or multi-coupling a natural rubber latex or a natural rubber and comprises 15% by mass or more of a high molecular weight component, P1, having a molecular weight of 5,000,000 to 50,000,000 and 40% by mass or less of an ultrahigh molecular weight component, P2, having a molecular weight of exceeding 50,000,000, and the relation between mass % of P1 and mass % of P2 is 1.5√ómass % of P1?mass % of P2, each measured by the following measuring method, wherein a measuring method for a rubber molecular weight is measured by means of a field flow fractionation equipment with a multi-angle light scattering detector for a soluble part of a centrifuged rubber solution at a centrifugal acceleration of 10,000 to 1,000,000 G.
    Type: Application
    Filed: May 8, 2013
    Publication date: November 14, 2013
    Applicant: Bridgestone Corporation
    Inventors: Kazutaka TSUCHIDA, Makiko YONEMOTO
  • Patent number: 6558700
    Abstract: A multiple-unit sustained release tablet characterized by consisiting of a granular part and a powdery part, each granule comprising a matrix composed of a water-insoluble polymer and an active ingredient. Another tablet characterized in that each granule is coated with a release-controlling film. The object of the present invention is to provide a multiple-unit sustained release tablet showing little change in dissolution speed caused by the compression in the tableting step.
    Type: Grant
    Filed: October 17, 2000
    Date of Patent: May 6, 2003
    Assignee: Taisho Pharmaceutical Co., Ltd.
    Inventors: Kazutaka Tsuchida, Shinji Aoki