Patents by Inventor Hiroyuki Danjyo

Hiroyuki Danjyo 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).

  • Unshaped refractories
    Patent number: 4292082
    Abstract: Unshaped refractories are disclosed which have incorporated therein granules comprising fine powder refractory and carbonaceous material. The fine powder refractory may be the refractories of magnesia clinker, dolomite, magnesia-dolomite, high alumina, recovered materials of such refractories recovered after use, and mixtures of two or more thereof. The carbonaceous material may be any one of: thermosetting resin, a thermoplastic resin to which has been added pitch and hardening agent, other resins, or mixtures of two or more thereof.
    Type: Grant
    Filed: January 31, 1980
    Date of Patent: September 29, 1981
    Assignee: Shinagawa Refractories Co. Ltd.
    Inventors: Hiroyuki Danjyo, Shigeru Okuda, Eiichi Yorita
  • Method for the repair of runner for molten metal
    Patent number: 4279844
    Abstract: A method for the repair of runner lining for molten metal comprising the steps of setting an inner molding former provided with a vibrating mechanism, in a repairing runner for molten metal, filling up under vibration the void space formed between the former and the existing lining, with a runner material containing less water, and curing the filled-up material under heating.
    Type: Grant
    Filed: February 15, 1979
    Date of Patent: July 21, 1981
    Assignee: Shinagawa Refractories Co., Ltd.
    Inventors: Hiroyuki Danjyo, Masashi Mori
  • Gunning refractories
    Patent number: 4261752
    Abstract: A gunning refractory of the mean particle diameter in the range 1-10 mm, characterized in that a molten liquid of pitch having softening point higher than 100.degree. C. is mixed with refractory inorganic fine particles where the proportion to the total weight is in the range 5-85% by weight, and thereafter the mixture is hardened.
    Type: Grant
    Filed: May 15, 1979
    Date of Patent: April 14, 1981
    Assignee: Shinagawa Refractories Co., Ltd.
    Inventors: Hiroyuki Danjyo, Eiichi Yorita, Shojiro Sawada, Fumiyoshi Hashimoto