Patents by Inventor Eizaburo Okada

Eizaburo Okada 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).

  • Method for improving workability of fresh fiber containing cement mortar and concrete
    Patent number: 4127417
    Abstract: Fiber-containing cement mortar and concrete are improved by adding a salt of a .beta.-naphthalenesulfonic acid-formaldehyde high condensate when the ingredients of the fiber-containing cement mortar or concrete are mixed in order to improve the workability of the fresh fiber-containing cement mortar or concrete whereby the physical properties of the resulting hardened cement mortar or concrete are improved.
    Type: Grant
    Filed: November 21, 1977
    Date of Patent: November 28, 1978
    Assignee: Kao Soap Co., Ltd.
    Inventors: Eizaburo Okada, Kenichi Hattori