Patents by Inventor Masatoshi Isobe

Masatoshi Isobe 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).

  • Patent number: 9570335
    Abstract: According to the invention, a dicing film, which generates a small amount of scrapes and beard-like burrs during dicing and furthermore has desirable strength and external appearance, is provided. The dicing film according to the invention has an adhesive layer on at least one surface of a base film, wherein the base film contains a copolymer (A) of at least two kinds of alkyl(meth)acrylates and styrene; and a styrene-based elastomer (B). The copolymer (A) of at least two kinds of alkyl(meth)acrylates and styrene is a styrene-alkyl methacrylate-alkyl acrylate copolymer.
    Type: Grant
    Filed: September 13, 2011
    Date of Patent: February 14, 2017
    Assignee: SUMITOMO BAKELITE CO., LTD.
    Inventors: Kazuhiko Maruyama, Masatoshi Isobe
  • Publication number: 20160152831
    Abstract: The present invention relates to a colorant for hair dyeing containing a compound represented by the following general formula (I), a composition for hair dyeing containing the same, and a hair dyeing method: (in the formula, R1, R2 and R3 each independently represent a hydrogen atom, a linear or branched alkyl group having from 1 to 6 carbon atoms, or a linear or branched alkoxy group having from 1 to 6 carbon atoms, and An? represents an inorganic anion or an organic anion).
    Type: Application
    Filed: June 10, 2014
    Publication date: June 2, 2016
    Applicant: HODOGAYA CHEMICAL CO., LTD.
    Inventors: Mitsuhiro AKIBA, Kenichiro SUZUKI, Michihiro GONDA, Masatoshi ISOBE
  • Patent number: 8834579
    Abstract: The present invention relates to an azo dye composition for hair dyeing that has an excellent performance as a dye for hair dyeing and proves negative in the Ames test, and also relates to a method for producing the composition. An object of the present invention is to develop a purification method for a dye composition for hair dyeing mainly containing an azo dye and proving negative in the Ames test, and to provide the dye composition for hair dyeing that is produced by applying the purification method and indicates negative in the Ames test. The dye composition for hair dyeing contains, as a main component, the azo dye having trimethylammonio, and the dye composition for hair dyeing is characterized in that the result of the Ames test is negative.
    Type: Grant
    Filed: March 12, 2013
    Date of Patent: September 16, 2014
    Assignee: Hodogaya Chemical Co., Ltd.
    Inventors: Masatoshi Isobe, Kenichiro Suzuki, Mitsuhiro Akiba
  • Publication number: 20140011026
    Abstract: An object of the present invention is to provide an adhesive tape for processing a semiconductor wafer or the like, which is capable of inhibiting electrical charging in a stable manner. The adhesive tape (dicing tape) (100) for processing a semiconductor wafer or the like includes a base layer (200) and an adhesive layer (300). The adhesive layer (300) is formed on the base layer (200). The adhesive layer (300) contains a curing component that cures the adhesive layer (300). The base layer (200) is composed mainly of a resin. A polymer-type antistatic agent is kneaded into the resin. The polymer-type antistatic agent has an MFR, measured under measurement conditions of 190° C. and 21.18 N in accordance with JIS K7210, of at least 10.0 g/10 min and not more than 15.0 g/10 min.
    Type: Application
    Filed: March 22, 2012
    Publication date: January 9, 2014
    Applicant: SUMITOMO BAKELITE CO., LTD.
    Inventors: Akihiro Ishiba, Masatoshi Isobe
  • Publication number: 20140011025
    Abstract: An object of the present invention is to provide an adhesive tape for processing semiconductor wafers and the like that is able to adequately reduce the amount of adhesive remaining on the surface of an adherend after peeling off the tape. The adhesive tape for semiconductor wafer processing (100) according to the present invention comprises a base material layer (200) and an adhesive layer (300). The adhesive layer (300) is formed on at least one side of the base material layer (200). In addition, the adhesive layer (300) is mainly composed of a carboxyl group-containing polymer. The carboxyl group-containing polymer contains a radiation-polymerizable compound (and particularly, urethane acrylate).
    Type: Application
    Filed: March 27, 2012
    Publication date: January 9, 2014
    Applicant: SUMITOMO BAKELITE CO., LTD.
    Inventors: Akihiro Ishiba, Masatoshi Isobe, Yoshinori Nagao
  • Publication number: 20130340182
    Abstract: The present invention relates to an azo dye composition for hair dyeing that has an excellent performance as a dye for hair dyeing and proves negative in the Ames test, and also relates to a method for producing the composition. An object of the present invention is to develop a purification method for a dye composition for hair dyeing mainly containing an azo dye and proving negative in the Ames test, and to provide the dye composition for hair dyeing that is produced by applying the purification method and indicates negative in the Ames test. The dye composition for hair dyeing contains, as a main component, the azo dye having trimethylammonio, and the dye composition for hair dyeing is characterized in that the result of the Ames test is negative.
    Type: Application
    Filed: March 12, 2013
    Publication date: December 26, 2013
    Applicant: HODOGAYA CHEMICAL CO., LTD.
    Inventors: Masatoshi Isobe, Kenichiro Suzuki, Mitsuhiro Akiba
  • Publication number: 20130171449
    Abstract: According to the invention, a dicing film, which generates a small amount of scrapes and beard-like burrs during dicing and furthermore has desirable strength and external appearance, is provided. The dicing film according to the invention has an adhesive layer on at least one surface of a base film, wherein the base film contains a copolymer (A) of at least two kinds of alkyl(meth)acrylates and styrene; and a styrene-based elastomer (B). The copolymer (A) of at least two kinds of alkyl(meth)acrylates and styrene is a styrene-alkyl methacrylate-alkyl acrylate copolymer.
    Type: Application
    Filed: September 13, 2011
    Publication date: July 4, 2013
    Applicant: SUMITOMO BAKELITE CO., LTD.
    Inventors: Kazuhiko Maruyama, Masatoshi Isobe