Patents by Inventor Toshihiro Ohashi

Toshihiro Ohashi 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).

  • Glass forming mold
    Patent number: 6868699
    Abstract: A glass forming mold comprising a mold having a molding surface, a chromium coating film formed on the molding surface and a silicon oxide film formed on the surface of the chromium coating film.
    Type: Grant
    Filed: May 28, 2002
    Date of Patent: March 22, 2005
    Assignee: Asahi Glass Company, Limited
    Inventors: Hiroyuki Oiwa, Toshihiro Ohashi, Yuichi Yamamoto, Atsuyoshi Takenaka
  • Glass bulb for a cathode ray tube and cathode ray tube
    Patent number: 6597102
    Abstract: A glass bulb for a cathode ray tube comprising a panel portion having a substantially rectangular face portion and a funnel portion having a neck portion, wherein when the glass bulb is used for a cathode ray tube, the glass bulb at least regionally suffers from a tensile stress resulting from the atmospheric pressure on the outer surface of the glass bulb having a vacuum inside, at least part of the face portion of the panel portion where the tensile stress over the face portion has a maximum value &sgr;VP has a compressive stress layer formed by chemical tempering on the outer surface, and the &sgr;VP, the magnitude of the compressive stress on the compressive stress layer &sgr;C MPa, and the thickness of the compressive stress layer tC &mgr;m satisfy the following relationship: 120/tC≧(1−|&sgr;VP/&sgr;C|)>30/tC provided that &sgr;VP≧20 MPa.
    Type: Grant
    Filed: April 11, 2002
    Date of Patent: July 22, 2003
    Assignee: Asahi Glass Company, Limited
    Inventors: Tsunehiko Sugawara, Mikio Miyamoto, Toshihiro Ohashi, Takahiro Murakami
  • Glass bulb for a cathode ray tube and cathode ray tube
    Publication number: 20030038582
    Abstract: A glass bulb for a cathode ray tube comprising a panel portion having a substantially rectangular face portion and a funnel portion having a neck portion, wherein when the glass bulb is used for a cathode ray tube, the glass bulb at least regionally suffers from a tensile stress resulting from the atmospheric pressure on the outer surface of the glass bulb having a vacuum inside, at least part of the face portion of the panel portion where the tensile stress over the face portion has a maximum value &sgr;VP has a compressive stress layer formed by chemical tempering on the outer surface, and the &sgr;VP, the magnitude of the compressive stress on the compressive stress layer &sgr;C MPa, and the thickness of the compressive stress layer tC &mgr;m satisfy the following relationship:
    Type: Application
    Filed: April 11, 2002
    Publication date: February 27, 2003
    Applicant: ASAHI GLASS COMPANY, LIMITED
    Inventors: Tsunehiko Sugawara, Mikio Miyamoto, Toshihiro Ohashi, Takahiro Murakami
  • Glass forming mold and process for its production, and method for producing a glass product for a cathode ray tube
    Publication number: 20030005725
    Abstract: A glass forming mold comprising a mold having a molding surface, a chromium coating film formed on the molding surface and a silicon oxide film formed on the surface of the chromium coating film.
    Type: Application
    Filed: May 28, 2002
    Publication date: January 9, 2003
    Applicant: Asahi Glass Company, Limited
    Inventors: Hiroyuki Oiwa, Toshihiro Ohashi, Yuichi Yamamoto, Atsuyoshi Takenaka
  • Mold for forming glass and method for forming glass
    Patent number: 5964916
    Abstract: A mold for forming glass, which comprises a mold body made of stainless steel and having a mold surface comprising a sidewall portion and a face portion continuous from the sidewall portion, a coating film of ductile material formed on the sidewall portion, and a coating film of high hardness material having oxidation resistance, formed on the face portion.
    Type: Grant
    Filed: April 30, 1998
    Date of Patent: October 12, 1999
    Assignee: Asahi Glass Company Ltd.
    Inventors: Yutaka Segawa, Toshihiro Ohashi
  • Method for forming a glass product for a cathode ray tube
    Patent number: 5628807
    Abstract: A glass forming mold which comprises a substrate made of stainless steel and a coating comprising the following components formed as the outermost surface coating on the substrate: (1) from 40 to 94 wt % of nickel and/or cobalt as component A; (2) from 5 to 59 wt % of tungsten as component B; and (3) from 0.5 to 40 wt % of at least one transition element having a melting point of at least 2,200.degree. C. as component C.
    Type: Grant
    Filed: August 3, 1995
    Date of Patent: May 13, 1997
    Assignee: Asahi Glass Company Ltd.
    Inventors: Masaru Yoshitake, Eiji Yanagisawa, Naoki Yoshida, Masuo Sugisaki, Atsuyoshi Takenaka, Yutaka Segawa, Toshihiro Ohashi, Hiroshi Wakatsuki