Patents by Inventor Tomonari Ogata

Tomonari Ogata 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).

  • Stabilizer for organic borate salts and photosensitive composition containing the same
    Patent number: 6562543
    Abstract: A stabilizer for thermally stabilizing an organic borate salt represented by formula (1) is disclosed, comprising a compound having one or two nitrogen-containing 5- or 6-membered heterocyclic ring having a double bond within the ring, a compound having a primary, secondary or tertiary amino group, or a compound having a thiol group. Also disclosed are a photosensitive composition comprising the stabilizer, an organic borate salt and if desired, a sensitizing dye or further a bisimidazole compound; a polymerizable composition comprising the photosensitive composition having added thereto at least one monomer having one or more ethylenically unsaturated bond and if desired, a high molecular polymer or further a pigment; and a colored pattern formed by using the polymerizable composition.
    Type: Grant
    Filed: January 22, 2001
    Date of Patent: May 13, 2003
    Assignee: Showa Denko K.K.
    Inventors: Tomonari Ogata, Tsuyoshi Katoh, Tomoe Uematsu, Norihide Arai, Tomoki Okano
  • Color filter and a method for producing a color filter
    Patent number: 6455207
    Abstract: A photopolymerization initiator for producing a color filter including a sensitizer (A) which absorbs light having a wavelength of 300 to 500 nm, an organic boron complex (B), and a thiol-group-containing compound (C); a photosensitive coloring composition including a transparent polymer (D) which is soluble to a solvent or an aqueous alkaline solution, a compound having ethylenic unsaturated bonds (E), a pigment (F), and the photopolymerization initiator; a color filter having a pixel formed by use of the coloring composition on a transparent substrate; and a method for producing the color filter.
    Type: Grant
    Filed: February 28, 2000
    Date of Patent: September 24, 2002
    Assignee: Showa Denko Kabushiki Kaisha
    Inventors: Tsuyoshi Katoh, Tomonari Ogata
  • Stabilizer for organic borate salts and photosensitive composition containing the same
    Publication number: 20010046643
    Abstract: A stabilizer for thermally stabilizing an organic borate salt represented by formula (1) is disclosed, comprising a compound having one or two nitrogen-containing 5- or 6-membered heterocyclic ring having a double bond within the ring, a compound having a primary, secondary or tertiary amino group, or a compound having a thiol group. Also disclosed are a photosensitive composition comprising the stabilizer, an organic borate salt and if desired, a sensitizing dye or further a bisimidazole compound; a polymerizable composition comprising the photosensitive composition having added thereto at least one monomer having one or more ethylenically unsaturated bond and if desired, a high molecular polymer or further a pigment; and a colored pattern formed by using the polymerizable composition.
    Type: Application
    Filed: January 22, 2001
    Publication date: November 29, 2001
    Inventors: Tomonari Ogata, Tsuyoshi Katoh, Tomoe Uematsu, Norihide Arai, Tomoki Okano
  • Stabilizer for organic borate salts and photosensitive composition containing the same
    Patent number: 6218076
    Abstract: A stabilizer for thermally stabilizing an organic borate salt represented by formula (1) is disclosed, comprising a compound having one or two nitrogen-containing 5- or 6-membered heterocyclic ring having a double bond within the ring, a compound having a primary, secondary or tertiary amino group, or a compound having a thiol group. Also disclosed are a photosensitive composition comprising the stabilizer, an organic borate salt and if desired, a sensitizing dye or further a bisimidazole compound; a polymerizable composition comprising the photosensitive composition having added thereto at least one monomer having one or more ethylenically unsaturated bond and if desired, a high molecular polymer or further a pigment; and a colored pattern formed by using the polymerizable composition.
    Type: Grant
    Filed: August 26, 1998
    Date of Patent: April 17, 2001
    Assignee: Showa Denko K.K.
    Inventors: Tomonari Ogata, Tsuyoshi Katoh, Tomoe Uematsu, Norihide Arai, Tomoki Okano