Patents by Inventor Yukari Ishikawa

Yukari Ishikawa 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).

  • Production method of SiC crystal
    Patent number: 9903047
    Abstract: A method for producing an SiC crystal, comprising supplying a raw material gas containing Si, C and N to vapor-grow an N-doped SiC crystal on an SiC substrate, wherein the SiC substrate is an SiC substrate on which La, Ce or Ti is deposited in part or whole of the surface or an SiC substrate in which La, Ce or Ti ion is implanted into part or whole of the surface.
    Type: Grant
    Filed: June 17, 2016
    Date of Patent: February 27, 2018
    Assignees: TOYOTA JIDOSHA KABUSHIKI KAISHA, JAPAN FINE CERAMICS CENTER
    Inventors: Akinori Seki, Yukari Ishikawa
  • PRODUCTION METHOD OF SiC CRYSTAL
    Publication number: 20160369424
    Abstract: A method for producing an SiC crystal, comprising supplying a raw material gas containing Si, C and N to vapor-grow an N-doped SiC crystal on an SiC substrate, wherein the SiC substrate is an SiC substrate on which La, Ce or Ti is deposited in part or whole of the surface or an SiC substrate in which La, Ce or Ti ion is implanted into part or whole of the surface.
    Type: Application
    Filed: June 17, 2016
    Publication date: December 22, 2016
    Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, JAPAN FINE CERAMICS CENTER
    Inventors: Akinori SEKI, Yukari ISHIKAWA
  • Recording medium for ink jet printers
    Patent number: 6815021
    Abstract: The present invention provides a recording medium for ink jet printers in which superior image recording quality and color stability are exhibited. In a recording medium for ink jet printers in which an ink receiving layer contained at least pigment and binder resin is provided on a supporting material, partially saponified PVA having a degree of saponification of 85.0 to 73.0 mol % and a degree of polymerization of 300 to 1500, is contained in the ink receiving layer as a color stability improving component.
    Type: Grant
    Filed: March 30, 2000
    Date of Patent: November 9, 2004
    Assignees: Seiko Epson Corporation, Tomoegawa Paper Co., Ltd.
    Inventors: Takayuki Ishikawa, Nobuhiro Kubota, Minoru Tsuchida, Shigeki Asai, Takeshi Yoshimoto, Kiyoshi Iwamoto, Jun Sugiyama, Hiroyuki Onishi, Yukari Ishikawa
  • Ink-jet recording medium
    Patent number: 6656544
    Abstract: A recording medium for ink jet printers having superior effects in preventing recorded image deterioration such as lowering of image clarity, decrease in density, change in color tone, etc., under high temperature and high humidity, is provided. An ink receiving layer is formed on a base material by coating acrylic copolymer containing at least (meth)acrylate having a solubility parameter (&dgr;) of 15.0 to 23.0 MPa½ as a copolymerizing component, and thereby a recording medium for ink jet printers is produced.
    Type: Grant
    Filed: June 26, 2001
    Date of Patent: December 2, 2003
    Assignee: Tomoegawa Paper Co., LTD
    Inventors: Takayuki Ishikawa, Nobuhiro Kubota, Shigeki Asai, Minoru Tsuchida, Kiyoshi Iwamoto, Jun Sugiyama, Hiroyuki Onishi, Yukari Ishikawa
  • Medium for ink-jet recording
    Patent number: 6548150
    Abstract: A recording medium for ink jet printers having superior recording properties for ink jet printers and having superior surface strength in which recorded images are not easily peeled. Acrylic type copolymer in which at least three components of an A component: (metha)acrylate; a B component: hydroxyalkyl (metha)acrylate; and a C component: antioxidation monomer and/or ultraviolet ray absorptivity monomer are copolymerizing components is contained in a coating solution, an ink receiving layer is provided by coating this solution on a base material, whereby a recording medium for ink jet printers is formed.
    Type: Grant
    Filed: September 25, 2000
    Date of Patent: April 15, 2003
    Assignees: Seiko Epson Corporation, Tomoegawa Paper Co., Ltd.
    Inventors: Takayuki Ishikawa, Takeshi Yoshimoto, Nobuhiro Kubota, Shinichiro Kobayashi, Kiyoshi Iwamoto, Jun Sugiyama, Hiroyuki Onishi, Yukari Ishikawa