Patents by Inventor Yoshikazu Kaite

Yoshikazu Kaite 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 of performing an ion exchange of optical glass
    Patent number: 5139557
    Abstract: This invention relates to a method of performing an ion exchange of optical glass to produce an axial gradient index material having a good linear distributiion by bringing a glass body containing a monovalent cation component into contact with a medium containing a monovalent cation component and exchanging these cation components under a predetermined condition.
    Type: Grant
    Filed: August 13, 1991
    Date of Patent: August 18, 1992
    Assignee: Nippon Sheet Glass Co., Ltd.
    Inventors: Shigeo Kittaka, Hiroshi Koshi, Yoshikazu Kaite, Minoru Toyama, Noboru Akazawa
  • Ion exchange processing method of glass
    Patent number: 4874414
    Abstract: The essential surface of the glass body to undergo the ion exchange processing is coated with the porous layer, which is formed by drying and sintering inorganic fluid, containing clay for more than 3 weight %, so as to have the ion exchange carried out through the above porous layer.
    Type: Grant
    Filed: September 23, 1988
    Date of Patent: October 17, 1989
    Assignee: Nippon Sheet Glass Co., Ltd.
    Inventors: Yoshikazu Kaite, Takashi Yamagishi
  • Optical glass fiber having cover glass of sodium zinc alumino borosilicate
    Patent number: 4367012
    Abstract: This invention provides a light-transmitting glass having superior weatherability which has the following composition in % by weight:______________________________________ SiO.sub.2 38-70 B.sub.2 O.sub.3 4-22 Na.sub.2 O 8-24 K.sub.2 O 0-15 Li.sub.2 O 0-15 Cs.sub.2 O 0-15 Al.sub.2 O.sub.3 1-22 ZnO 1-16 TiO.sub.2 0-7 ZrO.sub.2 0-7 CaO 0-7 BaO 0-7 MgO 0-7 ______________________________________provided that Na.sub.2 O+K.sub.2 O+Li.sub.2 O+Cs.sub.2 O is 13 to 24, and Al.sub.2 O.sub.3 +ZnO+TiO.sub.2 +ZrO.sub.2 +CaO+BaO+MgO is 2 to 32.The aforesaid multicomponent glass exhibits superior water resistance even when used as a covering ingredient of a light-transmitting glass fiber.
    Type: Grant
    Filed: December 23, 1980
    Date of Patent: January 4, 1983
    Assignee: Nippon Sheet Glass Co., Ltd.
    Inventors: Yoshirou Ikeda, Yoshikazu Kaite, Toshiro Ikuma
  • Step-type light-transmitting body having excellent water resistance
    Patent number: 4265667
    Abstract: A step-type light-transmitting body having excellent water resistance, said light-transmitting body comprising a core material of a glass having the following composition in % by weight: (1) SiO.sub.2 15-40, (2) ZrO.sub.2 8-17, (3) B.sub.2 O.sub.3 5-15, (4) BaO 30-45, (5) Na.sub.2 O 3-15, as essential ingredients, and (6) GeO.sub.2 0-30, TiO.sub.2 0-3, Al.sub.2 O.sub.3 0-5, La.sub.2 O.sub.3 0-5, MgO 0-5, CaO 0-7, ZnO 0-7, SrO 0-5, Li.sub.2 O 0-8, K.sub.2 O 0-10, Rb.sub.2 O 0-5, and Cs.sub.2 O 0-8, as additional ingredients; provided that SiO.sub.2 +GeO.sub.2 15-50, ZrO.sub.2 +BaO 38-55, Na.sub.2 O+Li.sub.2 O+K.sub.2 O+Rb.sub.2 O+Cs.sub.2 O 5-15, and MgO+CaO+ZnO+SrO+TiO.sub.2 +Al.sub.2 O.sub.3 +La.sub.2 O.sub.3 0-12. In the above composition, the amounts of (2) ZrO.sub.2, (3) B.sub.2 O.sub.3, (5) Na.sub.2 O and ZrO.sub.2 + BaO may be changed to 8-15, 7-12, 5-12, and 38-50, respectively.
    Type: Grant
    Filed: April 25, 1980
    Date of Patent: May 5, 1981
    Assignee: Nippon Sheet Glass Co., Ltd.
    Inventors: Yoshirou Ikeda, Yoshikazu Kaite