Patents by Inventor Tadashige Hirano

Tadashige Hirano 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).

  • Resol phenolic resin for friction material, method for producing the same, adhesive for friction material, and wet friction plate
    Patent number: 10259902
    Abstract: According to the present invention, there is provided a resol phenolic resin for a friction material wherein the resol phenolic resin has a structural unit A represented by Formula (1) and a structural unit B represented by Formula (2): wherein in Formula (1), m represents an integer of 1 or more; in a case where m is 1, R represents a methylol group; and in a case where m is 2 or more, R's independently represent a hydrogen atom or a methylol group and at least one R is a methylol group; and wherein in Formula (2), n represents an integer of 1 or more; in a case where n is 1, R represents a methylol group; and in a case where n is 2 or more, R's independently represent a hydrogen atom or a methylol group and at least one R is a methylol group.
    Type: Grant
    Filed: March 31, 2016
    Date of Patent: April 16, 2019
    Assignee: SUMITOMO BAKELITE COMPANY LIMITED
    Inventors: Hajime Mifuka, Tadashige Hirano, Kenichi Iso
  • RESOL PHENOLIC RESIN FOR FRICTION MATERIAL, METHOD FOR PRODUCING THE SAME, ADHESIVE FOR FRICTION MATERIAL, AND WET FRICTION PLATE
    Publication number: 20160289367
    Abstract: According to the present invention, there is provided a resol phenolic resin for a friction material wherein the resol phenolic resin has a structural unit A represented by Formula (1) and a structural unit B represented by Formula (2): wherein in Formula (1), m represents an integer of 1 or more; in a case where m is 1, R represents a methylol group; and in a case where m is 2 or more, R's independently represent a hydrogen atom or a methylol group and at least one R is a methylol group; and wherein in Formula (2), n represents an integer of 1 or more; in a case where n is 1, R represents a methylol group; and in a case where n is 2 or more, R's independently represent a hydrogen atom or a methylol group and at least one R is a methylol group.
    Type: Application
    Filed: March 31, 2016
    Publication date: October 6, 2016
    Applicants: SUMITOMO BAKELITE CO., LTD., NSK-WARNER K.K.
    Inventors: Hajime Mifuka, Tadashige Hirano, Kenichi Iso