Patents by Inventor Chihiro Sakurai

Chihiro Sakurai 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).

  • Ceramic heater and method of manufacturing the same
    Patent number: 6025579
    Abstract: A ceramic heater includes a heating element and a sintered body. The heating element is formed of a material containing one of a refractory metal having a melting point of 2,000.degree. C. or more, and a material including an inorganic conductive material. The sintered body of an insulating ceramics contains one of silicon nitride and silicon carbide materials. The heating element is buried in the sintered body. The insulating ceramics contains at least one kind of nitrides of Groups IIIA, IVA, and VA in the element periodic table at a ratio of 0.01 vol % to 10 vol %. A method of manufacturing the ceramic heater is also disclosed.
    Type: Grant
    Filed: June 14, 1999
    Date of Patent: February 15, 2000
    Assignee: Jidosha Kiki Co., Ltd.
    Inventors: Arihito Tanaka, Chihiro Sakurai
  • Metal member connecting structure, metal member connecting method, ceramic heater, and ceramic heater manufacturing method
    Patent number: 5945019
    Abstract: To join at least two metal members a connecting member made of a green ceramic body or ceramic sintered body having connecting a hole formed therein is used. After at least the two metal members are inserted in the hole of the connecting member to overlap their joining ends, they are sintered.
    Type: Grant
    Filed: January 29, 1998
    Date of Patent: August 31, 1999
    Assignee: Jidosha Kiki Co., Ltd.
    Inventors: Arihito Tanaka, Chihiro Sakurai, Toshitsugu Miura
  • Annealing separator having excellent reactivity for grain-oriented electrical steel sheet and method of use the same
    Patent number: 5685920
    Abstract: Disclosed is an annealing separator for production for grain-oriented electrical steel sheet, containing one or more compound selected from the following general formula;?Mg.sub.1-x M.sup.3+.sub.x !O ?Mg.sub.1-x M.sup.2+.sub.x !O or ?Mg.sub.1-x M.sup.2+.sub.x1 M.sup.3+.sub.x2 !OwhereM.sup.2+ is at least one bivalent element selected from the group consisting of Be, Ca, Ba, Sr, Sn, Mn, Fe, Co, Ni, Cu, Zn;M.sup.3+ is at least one tervalent element selected from the group consisting of Al, Fe, Cr, Co, B, Ti, Sb;0.01.ltoreq.x.ltoreq.0.40; x=x1+x2This annealing separator having a lower melting point and higher degree of reactivity is applied on the decarburization annealed strip, and improves the properties of the glass film, especially uniform film appearance and good sealing effect, and magnetic properties.
    Type: Grant
    Filed: May 12, 1995
    Date of Patent: November 11, 1997
    Assignee: Nippon Steel Corporation
    Inventors: Osamu Tanaka, Maremizu Ishibashi, Tsuyoshi Hamaya, Tsutomu Haratani, Tomoji Kumano, Koji Yamasaki, Akira Sakaida, Chihiro Sakurai, Hotaka Honma
  • Process for preparing zirconia sols and/or zirconia forms
    Patent number: 5238625
    Abstract: Zirconia sols are prepared by hydrolyzing zirconium alkoxides by aqueous hydrogen peroxide in the presence of an acid, evaporating the hydrolysates to dryness, and redispersing the dried hydrolysates in an organic solvent and the sols can be used for the preparation of zirconia forms in a desired shape satisfactorily on a commercial scale with removal of as much residual carbon as possible and without foaming in the gelation and molding steps.
    Type: Grant
    Filed: August 6, 1991
    Date of Patent: August 24, 1993
    Assignee: Colloid Research Institute
    Inventors: Chihiro Sakurai, Masahiko Okuyama