Patents by Inventor Takuya Tsunemasu

Takuya Tsunemasu 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).

  • Phenol resin for wet friction material, phenol resin composition, and wet friction material
    Patent number: 11512754
    Abstract: A phenol resin for a wet friction material of the invention contains a resol-type phenol resin having, in one molecule, a structural unit A which is derived from a phenol compound having one phenolic hydroxyl group and a structural unit B which is derived from a polyfunctional phenol compound having two phenolic hydroxyl groups.
    Type: Grant
    Filed: February 26, 2020
    Date of Patent: November 29, 2022
    Assignees: NSK-Warner K.K., SUMITOMO BAKELITE CO., LTD.
    Inventors: Takuya Tsunemasu, Takao Kunimi
  • PHENOL RESIN FOR WET FRICTION MATERIAL, PHENOL RESIN COMPOSITION, AND WET FRICTION MATERIAL
    Publication number: 20200271177
    Abstract: A phenol resin for a wet friction material of the invention contains a resol-type phenol resin having, in one molecule, a structural unit A which is derived from a phenol compound having one phenolic hydroxyl group and a structural unit B which is derived from a polyfunctional phenol compound having two phenolic hydroxyl groups.
    Type: Application
    Filed: February 26, 2020
    Publication date: August 27, 2020
    Applicants: NSK-WARNER K.K., SUMITOMO BAKELITE CO., LTD.
    Inventors: Takuya Tsunemasu, Takao Kunimi