Patents by Inventor Tsugunobu Murakami

Tsugunobu Murakami 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).

  • METHOD FOR MANUFACTURING GLASS PLATE
    Publication number: 20120125050
    Abstract: A method for manufacturing a glass plate includes preparing an accommodating part made of platinum or a platinum alloy, fining molten glass of a melted feedstock, stirring and homogenizing the molten glass, and supplying the molten glass to a forming apparatus. The fining the molten glass includes causing gas bubbles to float up and out from the molten glass, and causing absorption of the gas component in the molten glass and eliminating gas bubbles. The water vapor partial pressure of an atmosphere in the causing the gas bubbles is lower than the water vapor partial pressure in at least a portion of the causing the absorption of the gas component. A boundary between the causing the gas bubbles and the causing the absorption of the gas component is a temperature lower than the maximum temperature by 30° C. or more after the molten glass has reached the maximum temperature.
    Type: Application
    Filed: September 29, 2011
    Publication date: May 24, 2012
    Applicant: AVANSTRATE INC.
    Inventor: Tsugunobu Murakami
  • Lining material for glass melting furnaces, glass melting furnaces, process for producing glass products, and process for purifying the lining material
    Patent number: 6589475
    Abstract: A lining material for glass melting furnaces comprises platinum or platinum alloy as a base material containing osmium as an impurity in an amount no more than 20 ppm. The lining material is used for that part of the melting furnace which comes into contact with molten glass. The low osmium content prevents the formation of bubbles in molten glass, thereby providing high-quality glass products.
    Type: Grant
    Filed: March 20, 2002
    Date of Patent: July 8, 2003
    Assignee: NH Technoglass Co.
    Inventors: Tsugunobu Murakami, Tadakazu Hidai
  • Lining materials for glass melting furnaces
    Publication number: 20020174688
    Abstract: A lining material for glass melting furnaces comprises platinum or platinum alloy as a base material containing osmium as an impurity in an amount no more than 20 ppm. The lining material is used for that part of the melting furnace which comes into contact with molten glass. The low osmium content prevents the formation of bubbles in molten glass, thereby providing high-quality glass products.
    Type: Application
    Filed: March 20, 2002
    Publication date: November 28, 2002
    Applicant: NH Technoglass Co.
    Inventors: Tsugunobu Murakami, Tadakazu Hidai
  • Lining material for glass melting furnaces, glass melting furnaces, process for producing glass products, and process for purifying the lining material
    Patent number: 6401493
    Abstract: A lining material for glass melting furnaces comprises platinum or platinum alloy as a base material containing osmium as an impurity in an amount no more than 20 ppm. The lining material is used for that part of the melting furnace which comes into contact with molten glass. The low osmium content prevents the formation of bubbles in molten glass, thereby providing high-quality glass products.
    Type: Grant
    Filed: September 7, 1999
    Date of Patent: June 11, 2002
    Assignee: NH Technologies
    Inventors: Tsugunobu Murakami, Tadakazu Hidai
  • Lining material for glass melting furnaces, glass melting furnaces, process for producing glass products, and process for purifying the lining material
    Patent number: 6250111
    Abstract: A lining material for glass melting furnaces comprises platinum or platinum alloy as a base material containing osmium as an impurity in an amount no more than 20 ppm. The lining material is used for that part of the melting furnace which comes into contact with molten glass. The low osmium content prevents the formation of bubbles in molten glass, thereby providing high-quality glass products.
    Type: Grant
    Filed: December 1, 1998
    Date of Patent: June 26, 2001
    Assignee: NH Technoglass Co.
    Inventors: Tsugunobu Murakami, Tadakazu Hidai