Patents by Inventor Hajime Mifuka

Hajime Mifuka 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: 20230228312
    Abstract: Provided is a phenol resin composition for a friction material, including a component (A) of a silicone resin having a softening point of 140° C. or lower and a component (B) of a phenol resin.
    Type: Application
    Filed: May 24, 2021
    Publication date: July 20, 2023
    Applicant: SUMITOMO BAKELITE CO., LTD.
    Inventor: Hajime Mifuka
  • Publication number: 20220213248
    Abstract: According to the present invention, A resin material including a phenolic resin and a dicyandiamide polymer finely dispersed in the phenolic resin; and a method for producing a resin material including a phenolic resin and a dicyandiamide polymer dispersed in the phenolic resin, the method including a step of preparing a resin composition including the phenolic resin and dicyandiamide and a step of heating the resin composition to polymerize the dicyandiamide and form the dicyandiamide polymer are provided.
    Type: Application
    Filed: April 10, 2020
    Publication date: July 7, 2022
    Applicant: SUMITOMO BAKELITE CO., LTD.
    Inventor: Hajime Mifuka
  • 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
  • Publication number: 20180079938
    Abstract: The resol type modified phenol resin composition contains a resol type modified phenol resin having a structural unit A by General Formula (1) which is modified by dimethylphenols and a structural unit B represented by General Formula (2). In Formula (1), m representing an integer of 1 or more, wherein in a case where m is 1, R represents a methylol group; in a case where m is 2 or more, R's independently represent a hydrogen atom or a methylol group, and at least one of R's is a methylol group. In Formula (2), n representing an integer of 1 or more, wherein in a case where n is 1, R represents a methylol group; in a case where n is 2 or more, R's independently represent a hydrogen atom or a methylol group, and at least one of R's is a methylol group.
    Type: Application
    Filed: March 31, 2016
    Publication date: March 22, 2018
    Applicant: SUMITOMO BAKELITE CO., LTD.
    Inventor: Hajime Mifuka
  • Patent number: 9862823
    Abstract: A phenolic resin for a wet friction material of the present invention is a phenolic resin used in a wet friction material and a bisphenol-modified phenolic resin modified with bisphenols. In addition, a wet friction material of the present invention is formed using the phenolic resin for a wet friction material.
    Type: Grant
    Filed: March 26, 2014
    Date of Patent: January 9, 2018
    Assignee: SUMITOMO BAKELITE CO., LTD.
    Inventor: Hajime Mifuka
  • 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
  • Patent number: 9303139
    Abstract: A method of manufacturing a resin molded article includes a step of preparing a resin powder having low dust generation property by adding a liquid paraffin to a thermosetting resin, and a step of obtaining a resin molded article by heating and kneading the resin powder having low dust generation property, in which the step of preparing the resin powder having low dust generation property includes a step in which the thermosetting resin is melted and the liquid paraffin is added to the melted thermosetting resin to be stirred and mixed.
    Type: Grant
    Filed: February 14, 2013
    Date of Patent: April 5, 2016
    Assignee: SUMITOMO BAKELITE CO., LTD.
    Inventors: Masahiko Funabashi, Hajime Mifuka, Shinichi Ozeki, Masakatsu Asami
  • Publication number: 20160060424
    Abstract: A method of manufacturing a resin molded article includes a step of preparing a resin powder having low dust generation property by adding a liquid paraffin to a thermosetting resin, and a step of obtaining a resin molded article by heating and kneading the resin powder having low dust generation property, in which the step of preparing the resin powder having low dust generation property includes a step in which the thermosetting resin is melted and the liquid paraffin is added to the melted thermosetting resin to be stirred and mixed.
    Type: Application
    Filed: November 9, 2015
    Publication date: March 3, 2016
    Applicant: SUMITOMO BAKELITE CO., LTD.
    Inventors: Masahiko Funabashi, Hajime Mifuka, Shinichi Ozeki, Masakatsu Asami
  • Publication number: 20150005445
    Abstract: A method of manufacturing a resin molded article includes a step of preparing a resin powder having low dust generation property by adding a liquid paraffin to a thermosetting resin, and a step of obtaining a resin molded article by heating and kneading the resin powder having low dust generation property, in which the step of preparing the resin powder having low dust generation property includes a step in which the thermosetting resin is melted and the liquid paraffin is added to the melted thermosetting resin to be stirred and mixed.
    Type: Application
    Filed: February 14, 2013
    Publication date: January 1, 2015
    Applicant: SUMITOMO BAKELITE CO., LTD.
    Inventors: Masahiko Funabashi, Hajime Mifuka, Shinichi Ozeki, Masakatsu Asami
  • Publication number: 20140296374
    Abstract: A phenolic resin for a wet friction material of the present invention is a phenolic resin used in a wet friction material and a bisphenol-modified phenolic resin modified with bisphenols. In addition, a wet friction material of the present invention is formed using the phenolic resin for a wet friction material.
    Type: Application
    Filed: March 26, 2014
    Publication date: October 2, 2014
    Applicant: SUMITOMO BAKELITE CO., LTD.
    Inventor: Hajime Mifuka