Patents by Inventor Koji Obayashi

Koji Obayashi 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).

  • Vacuum degassing method for molten glass flow
    Publication number: 20020033030
    Abstract: When molten glass which is under an atmosphere of pressure P, is fed into a vacuum chamber capable of rendering a pressure to the molten glass to be in a range of 38 [mmHg]-(P-50) [mmHg] to perform degassing to the molten glass, a staying time of the molten glass in the vacuum chamber is in a range of 0.12-4.8 hours, whereby there is obtainable an effective degassing function to the molten glass.
    Type: Application
    Filed: September 20, 2001
    Publication date: March 21, 2002
    Applicant: ASAHI GLASS COMPANY, LIMITED
    Inventors: Toshiyasu Kawaguchi, Koji Obayashi, Misao Okada, Yusuke Takei
  • Vacuum degassing method for molten glass flow
    Patent number: 6332339
    Abstract: When molten glass which is under an atmosphere of pressure P, is fed into a vacuum chamber capable of rendering a pressure to the molten glass to be in a range of 38 [mmHg]-(P-50) [mmHg] to perform degassing to the molten glass, a staying time of the molten glass in the vacuum chamber is in a range of 0.12-4.8 hours, whereby there is obtainable an effective degassing function to the molten glass.
    Type: Grant
    Filed: April 12, 2000
    Date of Patent: December 25, 2001
    Assignee: Asahi Glass Company, Limited
    Inventors: Toshiyasu Kawaguchi, Koji Obayashi, Misao Okada, Yusuke Takei