Patents by Inventor Shojiro Sawada

Shojiro Sawada 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).

  • 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