Patents by Inventor Yasuhiro Kadota

Yasuhiro Kadota 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: 20210008917
    Abstract: Provided is a thermosensitive recording medium including: a transparent base material; a thermosensitive recording layer over the transparent base material; and a barrier layer over the thermosensitive recording layer, wherein the barrier layer contains hollow particles and a binder resin, and wherein when thermal energy is applied to the thermosensitive recording layer from a surface of the thermosensitive recording layer having the transparent base material, the thermosensitive recording layer develops a color. Also provided is a thermosensitive recording medium producing method including: a step of forming a thermosensitive recording layer over a transparent base material; and a step of forming a barrier layer containing hollow particles and a binder resin over the thermosensitive recording layer.
    Type: Application
    Filed: December 21, 2018
    Publication date: January 14, 2021
    Inventors: Gaku KOHARA, Yasuhiro KADOTA
  • Publication number: 20190152248
    Abstract: Provided is a thermosensitive recording medium including a support, and a thermosensitive recording layer provided over at least one surface of the support and containing a leuco dye and a developer, wherein the developer includes 4-hydroxy-4?-benzyloxydiphenylsulfone and a diphenylsulfone compound represented by general formula (1), and wherein a content of the diphenylsulfone compound represented by general formula (1) is less than 3.0 parts by mass relative to 1.0 part by mass of the 4-hydroxy-4?-benzyloxydiphenylsulfone.
    Type: Application
    Filed: June 26, 2017
    Publication date: May 23, 2019
    Inventors: Kazumasa NODA, Kenji SHIMIZU, Yasuhiro KADOTA
  • Patent number: 8298653
    Abstract: A recording medium contains a support, and an antistatic agent-containing layer, and the antistatic agent-containing layer contains a binder resin and tin oxide-coated titanium oxide particles.
    Type: Grant
    Filed: September 15, 2009
    Date of Patent: October 30, 2012
    Assignee: Ricoh Company, Ltd.
    Inventors: Hiroki Kuboyama, Yasuhiro Kadota
  • Publication number: 20100068426
    Abstract: A recording medium contains a support, and an antistatic agent-containing layer, and the antistatic agent-containing layer contains a binder resin and tin oxide-coated titanium oxide particles.
    Type: Application
    Filed: September 15, 2009
    Publication date: March 18, 2010
    Applicant: RICOH COMPANY, LTD.
    Inventors: Hiroki Kuboyama, Yasuhiro Kadota
  • Patent number: 7425522
    Abstract: The present invention aims to provide thermosensitive recording materials that allow excellent stampability, prevent sticking, represent less image-density decrease due to image-shielding by protective layers, and generate less printing residual matters on heads. Specifically, the present invention provided thermosensitive recording materials that comprises a protective layer, a thermosensitive recording layer and a support in this order, wherein the thermosensitive recording layer develops a color by heating, the protective layer comprises a binder resin and an inorganic filler, the volume average particle diameter of the inorganic filler is 0.6 to 5.0 ?m, the content of the inorganic filler is 150 to 400% by mass based on the binder resin, and the protective layer comprises crosslinked polymethylmethacrylate particles.
    Type: Grant
    Filed: January 16, 2007
    Date of Patent: September 16, 2008
    Assignee: Ricoh Company, Ltd.
    Inventors: Yasuhiro Kadota, Toshiaki Ikeda
  • Patent number: 7419935
    Abstract: A heat-sensitive recording material comprising on one surface of a substrate a heat-sensitive coloring layer comprising a leuco dye and a color developer, wherein the heat-sensitive recording material comprises a layer which comprises a copolymer of a (meth)acryloyloxyalkylammonium salt and styrene; and the layer which comprises the copolymer of the (meth)acryloyloxyalkylammonium salt and styrene is at least any one of a back layer, an under layer and a protective layer.
    Type: Grant
    Filed: March 13, 2006
    Date of Patent: September 2, 2008
    Assignee: Ricoh Company, Ltd.
    Inventors: Yasuhiro Kadota, Takeshi Kajikawa, Kunihiko Hada
  • Publication number: 20080090725
    Abstract: The present invention aims to provide thermosensitive recording materials that allow excellent stampability, prevent sticking, represent less image-density decrease due to image-shielding by protective layers, and generate less printing residual matters on heads. Specifically, the present invention provided thermosensitive recording materials that comprises a protective layer, a thermosensitive recording layer and a support in this order, wherein the thermosensitive recording layer develops a color by heating, the protective layer comprises a binder resin and an inorganic filler, the volume average particle diameter of the inorganic filler is 0.6 to 5.0 ?m, the content of the inorganic filler is 150 to 400% by mass based on the binder resin, and the protective layer comprises crosslinked polymethylmethacrylate particles.
    Type: Application
    Filed: January 16, 2007
    Publication date: April 17, 2008
    Inventors: Yasuhiro Kadota, Toshiaki Ikeda
  • Publication number: 20060205593
    Abstract: A heat-sensitive recording material comprising on one surface of a substrate a heat-sensitive coloring layer comprising a leuco dye and a color developer, wherein the heat-sensitive recording material comprises a layer which comprises a copolymer of a (meth)acryloyloxyalkylammonium salt and styrene; and the layer which comprises the copolymer of the (meth)acryloyloxyalkylammonium salt and styrene is at least any one of a back layer, an under layer and a protective layer.
    Type: Application
    Filed: March 13, 2006
    Publication date: September 14, 2006
    Inventors: Yasuhiro Kadota, Takeshi Kajikawa, Kunihiko Hada
  • Patent number: 5516842
    Abstract: A polycarbonate resin composition is given as a mixture of (A) 97-50 wt. % of a polycarbonate resin, and (B) 3-50 wt. % of a graft copolymer. The graft copolymer is obtained by graft-polymerizing 50-95 wt. parts of a monomer selected from (b1) a monomer mixture comprising 60-90 wt. % of an aromatic vinyl monomer, 40-10 wt. % of a vinyl cyanide monomer, and 0-30 wt. % of a monomer copolymerizable with the monomers and (b2) an alkyl methacrylate having an alkyl group including 1-4 carbon atoms in the presence of a latex containing 5-50 wt. parts of a rubber polymer with respect to the total of the monomer and the rubber polymer as 100 wt. parts. The graft copolymer includes a graft-polymerized component having a weight-average molecular weight 50.times.10.sup.4 -300.times.10.sup.4. The polycarbonate resin composition shows a good extrudability and provides a sheet product which exhibits good thermoforming characteristics, such as suppressed drawdown and good deep drawability.
    Type: Grant
    Filed: November 4, 1994
    Date of Patent: May 14, 1996
    Assignees: Kureha Kagaku Kogyo Kabushiki Kaisha, Tsutsunaka Plastic Kogyo Kabushiki Kaisha
    Inventors: Mitsuru Hoshino, Takeo Ogihara, Yasuhiro Kadota, Kazuaki Maruyama