Patents by Inventor Takuo Hosaka

Takuo Hosaka 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).

  • Refractory composition for flow casting
    Patent number: 4377413
    Abstract: A refractory composition for flow casting consists essentially of 100 parts by weight of refractory material, 0.1 to 2 parts by weight of sparingly water-soluble aluminum tripolyphosphate, 0.2 to 3 parts by weight of alkali metal silicate, 0.5 to 5 parts by weight of clay, up to 2/5 part by weight of organic binder per amount of clay, and 0.2 to 4 parts by weight of at least one hardening promoting reagent selected from the group consisting of calcium silicate and calcium aluminate.
    Type: Grant
    Filed: July 30, 1981
    Date of Patent: March 22, 1983
    Assignees: Nippon Steel Corporation, Nippon Crucible Company, Ltd.
    Inventors: Mitsuo Nomura, Shigeru Amano, Sho Okubo, Takuo Hosaka, Kunihiko Shiraishi, Ryuzi Adachi
  • Refractory composition for flow casting
    Patent number: 4171984
    Abstract: A refractory composition for flow casting, comprising (1) 100 parts by weight of a refractory material and (2) about 1.15 to 9.4 parts by weight of a binder consisting of an alkali metal silicate, sparingly water-soluble aluminum tripolyphosphate and at least one of an organic paste and a clay, the refractory composition being capable of being kneaded with water prior to use.
    Type: Grant
    Filed: April 7, 1978
    Date of Patent: October 23, 1979
    Assignees: Nippon Crucible Co., Ltd., Teikoku Kako Co., Ltd.
    Inventors: Takuo Hosaka, Kunihiko Shiraishi, Ziro Nakano, Masanori Kinugasa
  • Process for producing powder of .beta.-type silicon carbide
    Patent number: 4117096
    Abstract: A process for producing a powder of .beta.-type silicon carbide, which comprises heating at a temperature of about 800.degree. to about 1,400.degree. C a mixture of a carbon powder having a particle size of about 20 microns or less and a metallic silicon powder with a carbon-to-silicon molar ratio of 1 : 0.6 to 1 : 2 in an oxidizing atmosphere having an oxygen concentration of 0.3 to 35% by volume, thereby to induce a spontaneous continuous reaction between carbon and silicon.
    Type: Grant
    Filed: August 18, 1977
    Date of Patent: September 26, 1978
    Assignee: Nippon Crucible Co., Ltd.
    Inventors: Takuo Hosaka, Tadao Sasaki, Hiroshige Suzuki