Patents by Inventor Keito Sekine

Keito Sekine 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).

  • Process for producing a glass for cathode ray tubes
    Patent number: 7000432
    Abstract: A process for producing a glass for cathode ray tubes, having a Sb2O3 content of from 0 to 0.19% as represented by mass percentage and containing H2O, which process comprises a step of melting a raw material in an atmosphere under a pressure of P0 to obtain a molten glass, and a step of vacuum degassing the molten glass in an atmosphere under a pressure PA which is lower than P0, wherein the pressure P of the molten glass is made to be at most (6.1 W+0.06) atm in the vacuum degassing step, wherein W is the content of said H2O as represented by mass percentage.
    Type: Grant
    Filed: March 7, 2002
    Date of Patent: February 21, 2006
    Assignee: Asahi Glass Company, Limited
    Inventors: Hajime Itoh, Rei Kitamura, Mitsuyoshi Sakai, Keito Sekine, Misao Okada
  • Process for producing a glass for cathode ray tubes
    Publication number: 20020193232
    Abstract: A process for producing a glass for cathode ray tubes, having a Sb2O3 content of from 0 to 0.19% as represented by mass percentage and containing H2O, which process comprises a step of melting a raw material in an atmosphere under a pressure of P0 to obtain a molten glass, and a step of vacuum degassing the molten glass in an atmosphere under a pressure PA which is lower than P0, wherein the pressure P of the molten glass is made to be at most (6.1 W+0.06) atm in the vacuum degassing step, wherein W is the content of said H2O as represented by mass percentage.
    Type: Application
    Filed: March 7, 2002
    Publication date: December 19, 2002
    Applicant: ASAHI GLASS COMPANY, LIMITED
    Inventors: Hajime Itoh, Rei Kitamura, Mitsuyoshi Sakai, Keito Sekine, Misao Okada