Patents by Inventor by Chieko Shida, executor

by Chieko Shida, executor 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).

  • Ground strengthening/soil-improving material
    Patent number: 5501719
    Abstract: Utilizing exhaust materials from various plants and industrial wastes containing CaO, Al.sub.2 O.sub.3, SiO.sub.2 and Fe.sub.2 O.sub.3 as major components, inexpensive ground-strengthening/soil-improving material is obtained by blending thereinto clay minerals and sintering the resultant mixture. A high unconfined compressive strength is conferred upon the ground-strengthening/soil-improving material upon the addition of alumina.
    Type: Grant
    Filed: July 14, 1994
    Date of Patent: March 26, 1996
    Assignee: Tokiwa Kogyo Co., Ltd.
    Inventors: Yukimori Shida, deceased, by Chieko Shida, executor, by Yoshitaka Shida, executor, by Mutsuho Shida, executor, by Yukie Takarazawa, executor, by Emiko Shida, executor