Patents by Inventor Yoshiya Narasaki

Yoshiya Narasaki 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: 9902675
    Abstract: A novel vinyl-group-containing fluorene compound and a method for producing the same, a polymerizable monomer and cross-linking agent including this compound, a leaving-group-containing fluorene compound, a monovinyl-group-containing fluorene compound, and methods for producing the same. This vinyl-group-containing fluorene compound is represented by formula (1). In the formula, W1 and W2 represent a group represented by formula (2), a group represented by formula (4), a hydroxyl group, or a (meth)acryloyloxy group, R3a and R3b represent a cyano group, a halogen atom, or a monovalent hydrocarbon, and n1 and n2 are integers of 0-4. In formulas (2) and (4), a ring (Z) is an aromatic hydrocarbon ring, X is a single bond or a group represented by —S—, R1 is a single bond or a C1-4 alkylene group, R2 is a specific substituent group such as a monovalent hydrocarbon, and m is an integer of 0 or greater.
    Type: Grant
    Filed: March 28, 2014
    Date of Patent: February 27, 2018
    Assignees: TOKYO OHKA KOGYO CO., LTD., DAICEL CORPORATION
    Inventors: Dai Shiota, Kunihiro Noda, Hiroki Chisaka, Yasuyuki Akai, Ichiro Takase, Yoshiya Narasaki, Daisuke Tanida, Kyuhei Kitao
  • Publication number: 20180050973
    Abstract: A novel vinyl-group-containing fluorene compound and a method for producing the same, a polymerizable monomer and cross-linking agent including the compound, a leaving-group-containing fluorene compound, a monovinyl-group-containing fluorene compound, and methods for producing the same. The vinyl-group-containing fluorene compound is represented by formula (1) in which W1 and W2 represent a group represented by formula (2), a group represented by formula (4), a hydroxyl group, or a (meth)acryloyloxy group, R3a and R3b represent a cyano group, a halogen atom, or a monovalent hydrocarbon, and n1 and n2 are integers of 0-4. In formulas (2) and (4), (Z) is an aromatic hydrocarbon ring, X is a single bond or a group represented by —S—, R1 is a single bond or a C1-4 alkylene group, R2 is a substituent such as a monovalent hydrocarbon, and m is an integer of 0 or more).
    Type: Application
    Filed: November 1, 2017
    Publication date: February 22, 2018
    Inventors: Dai SHIOTA, Kunihiro NODA, Hiroki CHISAKA, Yasuyuki AKAI, Ichiro TAKASE, Yoshiya NARASAKI, Daisuke TANIDA, Kyuhei KITAO
  • Patent number: 9447013
    Abstract: Provided is a method of oxidizing a substrate with excellent oxidizing power to yield a corresponding oxide. The method can employ a commercially available imide compound as intact as a catalyst and can produce the oxide in a high yield under mild conditions. A method for producing an oxide according to the present invention includes performing oxidation of a substrate in the presence of oxygen and ozone under catalysis of an imide compound to yield a corresponding oxide. The imide compound has a cyclic imide skeleton represented by Formula (I). In the formula, n is selected from 0 and 1; and X is selected from an oxygen atom and an —OR group, where R is selected from hydrogen and a hydroxy-protecting group.
    Type: Grant
    Filed: July 14, 2014
    Date of Patent: September 20, 2016
    Assignee: DAICEL CORPORATION
    Inventors: Yasutaka Ishii, Ichiro Takase, Yoshiya Narasaki, Takamasa Suzuki
  • Publication number: 20160046551
    Abstract: A novel vinyl-group-containing fluorene compound and a method for producing the same, a polymerizable monomer and cross-linking agent including this compound, a leaving-group-containing fluorene compound, a monovinyl-group-containing fluorene compound, and methods for producing the same. This vinyl-group-containing fluorene compound is represented by formula (1). In the formula, W1 and W2 represent a group represented by formula (2), a group represented by formula (4), a hydroxyl group, or a (meth)acryloyloxy group, R3a and R3b represent a cyano group, a halogen atom, or a monovalent hydrocarbon, and n1 and n2 are integers of 0-4. In formulas (2) and (4), a ring (Z) is an aromatic hydrocarbon ring, X is a single bond or a group represented by —S—, R1 is a single bond or a C1-4 alkylene group, R2 is a specific substituent group such as a monovalent hydrocarbon, and m is an integer of 0 or greater.
    Type: Application
    Filed: March 28, 2014
    Publication date: February 18, 2016
    Inventors: Dai Shiota, Kunihiro Noda, Hiroki Chisaka, Yasuyuki Akai, Ichiro Takase, Yoshiya Narasaki, Daisuke Tanida, Kyuhei Kitao