Patents by Inventor Jun Naka

Jun Naka 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: 6933253
    Abstract: An alkali-free glass applicable to a light transparent glass substrate in a liquid crystal display essentially consists, by weight, of basic elements of 40-70% SiO2, 6-25% Al2O3, 5-20% B2O3, 0-10% MgO, 0-15% CaO, 0-30% BaO, 0-10% SrO, and 0-10% ZnO, and a fining agent of a combination of 0.05-3% Sb2O3 and at least one of 0.05-2% SnO2 and 0.005-1% Cl2, which fining agent makes the resultant glass free from bubbles without the use of toxic As2O3 which has been known as the fining agent in the art.
    Type: Grant
    Filed: November 18, 2002
    Date of Patent: August 23, 2005
    Assignee: Nippon Electric Glass Co., Ltd.
    Inventors: Jun Naka, Toshiharu Narita, Shinkichi Miwa, Shigeru Yamamoto
  • Publication number: 20030121288
    Abstract: An alkali-free glass applicable to a light transparent glass substrate in a liquid crystal display essentially consists, by weight, of basic elements of 40-70% SiO2, 6-25% Al2O3, 5-20% B2O3, 0-10% MgO, 0-15% CaO, 0-30% BaO, 0-10% SrO, and 0-10% ZnO, and a fining agent of a combination of 0.05-3% Sb2O3 and at least one of 0.05-2% SnO2 and 0.005-1% Cl2, which fining agent makes the resultant glass free from bubbles without the use of toxic As2O3 which has been known as the fining agent in the art.
    Type: Application
    Filed: November 18, 2002
    Publication date: July 3, 2003
    Applicant: NIPPON ELECTRIC GLASS CO., LTD.
    Inventors: Jun Naka, Toshiharu Narita, Shinkichi Miwa, Shigeru Yamamoto
  • Patent number: 6546753
    Abstract: An alkali-free glass applicable to a light transparent glass substrate in a liquid crystal display essentially consists, by weight, of basic elements of 40-70% SiO2, 6-25% Al2O3, 5-20% B2O3, 0-10% MgO, 0-15% CaO, 0-30% BaO, 0-10% SrO, and 0-10% ZnO, and a fining agent of a combination of 0.05-3% Sb2O3 and at least one of 0.05-2% SnO2 and 0.005-1% Cl2, which fining agent makes the resultant glass free from bubbles without the use of toxic As2O3 which has been known as the fining agent in the art.
    Type: Grant
    Filed: July 17, 2001
    Date of Patent: April 15, 2003
    Assignee: Nippon Electric Glass Co. Ltd.
    Inventors: Jun Naka, Toshiharu Narita, Shinkichi Miwa, Shigeru Yamamoto
  • Patent number: 6508083
    Abstract: An alkali-free glass applicable to a light transparent glass substrate in a liquid crystal display essentially consists, by weight, of basic elements of 40-70% SiO2, 6-25% Al2O3, 5-20% B2O3, 0-10% MgO, 0-15% CaO, 0-30% BaO, 0-10% SrO, and 0-10% ZnO, and a fining agent of a combination of 0.05-3% Sb2O3 and at least one of 0.05-2% SnO2 and 0.005-1% Cl2, which fining agent makes the resultant glass free from bubbles without the use of toxic As2O3 which has been known as the fining agent in the art.
    Type: Grant
    Filed: August 20, 1997
    Date of Patent: January 21, 2003
    Assignee: Nippon Electric Glass Co., Ltd.
    Inventors: Jun Naka, Toshiharu Narita, Shinkichi Miwa, Shigeru Yamamoto
  • Publication number: 20020011080
    Abstract: An alkali-free glass applicable to a light transparent glass substrate in a liquid crystal display essentially consists, by weight, of basic elements of 40-70% SiO2, 6-25% Al2O3, 5-20% B2O3, 0-10% MgO, 0-15% CaO, 0-30% BaO, 0-10% SrO, and 0-10% ZnO, and a fining agent of a combination of 0.05-3% Sb2O3 and at least one of 0.05-2% SnO2 and 0.005-1% Cl2, which fining agent makes the resultant glass free from bubbles without the use of toxic As2O3 which has been known as the fining agent in the art.
    Type: Application
    Filed: July 17, 2001
    Publication date: January 31, 2002
    Applicant: NIPPON ELECTRIC GLASS CO., LTD.
    Inventors: Jun Naka, Toshiharu Narita, Shinkichi Miwa, Shigeru Yamamoto
  • Patent number: 5407872
    Abstract: A glass fiber forming composition exhibits a remarkably high dielectric constant .epsilon..sub..GAMMA. as well as superior chemical resistance, yet it is readily spun into glass fibers. The composition is characterized to show a devitrification temperature which is lower than a spinning temperature at which the glass composition exhibits a viscosity of 10.sup.2.5 poise, so as to be readily spun into corresponding glass fibers. The composition consists essentially of 40 to 65 mol % of SiO.sub.2 ; 20 to 45 mol % of at least one component selected from the group consisting of MgO, CaO, SrO and BaO; 5 to 25 mol % of at least one component selected from the group consisting of TiO.sub.2 and ZrO.sub.2 ; and 0.5 to 15 mol % of NbO.sub.5/2 as calculated from an incorporated amount of Nb.sub.2 O.sub.5. Alternately, the composition consist essentially of 40 to 65 mol % of SiO.sub.
    Type: Grant
    Filed: November 8, 1993
    Date of Patent: April 18, 1995
    Assignees: Matsushita Electric Works Ltd., Nippon Electric Glass Co. Ltd.
    Inventors: Kiyotaka Komori, Seishiro Yamakawa, Shigeru Yamamoto, Jun Naka, Tadashi Kokubo
  • Patent number: 5334645
    Abstract: A glass fiber forming composition exhibits a remarkably high dielectric constant .epsilon..sub.r as well as superior chemical resistance, yet it is readily spun into glass fibers. The composition is characterized to show a devitrification temperature which is lower than a spinning temperature at which the glass composition exhibits a viscosity of 10.sup.2.5 poise, so as to be readily spun into corresponding glass fibers. The composition consists essentially of 40 to 65 mol % of SiO.sub.2 ; 20 to 45 mol % of at least one component selected from the group consisting of MgO, CaO, SrO and BaO; 5 to 25 mol % of at least one component selected from the group consisting of TiO.sub.2 and ZrO.sub.2 ; and 0.5 to 15 mol % of NbO.sub.5/2 as calculated from an incorporated amount of Nb.sub.2 O.sub.5. Alternately, the composition consist essentially of 40 to 65 mol % of SiO.sub.
    Type: Grant
    Filed: November 8, 1993
    Date of Patent: August 2, 1994
    Assignees: Matsushita Electric Works, Ltd., Nippon Electric Glass Co., Ltd.
    Inventors: Kiyotaka Komori, Seishiro Yamakawa, Shigeru Yamamoto, Jun Naka, Tadashi Kokubo
  • Patent number: 5284807
    Abstract: A glass fiber forming composition exhibits a remarkably high dielectric constant .epsilon..sub.r as well as superior chemical resistance, yet it is readily spun into glass fibers. The composition is characterized to show a devitrification temperature which is lower than a spinning temperature at which the glass composition exhibits a viscosity of 10.sup.2.5 poise, so as to be readily spun into corresponding glass fibers. The composition consists essentially of 40 to 65 mol % of SiO.sub.2 ; 20 to 45 mol % of at least one component selected from the group consisting of MgO, CaO, SrO and BaO; 5 to 25 mol % of at least one component selected from the group consisting of TiO.sub.2 and ZrO.sub.2 ; and 0.5 to 15 mol % of NbO.sub.5/2 as calculated from an incorporated amount of Nb.sub.2 O.sub.5. Alternately, the composition consist essentially of 40 to 65 mol % of SiO.sub.
    Type: Grant
    Filed: February 7, 1992
    Date of Patent: February 8, 1994
    Assignees: Matsushita Electric Works, Ltd., Nippon Electric Glass Co., Ltd.
    Inventors: Kiyotaka Komori, Seishiro Yamakawa, Shigeru Yamamoto, Jun Naka, Tadashi Kukubo