Patents by Inventor Hideziro Ichimura

Hideziro Ichimura 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 of production of a sheet material having a superior durability and a sponge structure
    Patent number: 4088616
    Abstract: In accordance with the present invention, it has now been found that the coagulation property of polyurethane elastomers can be considerably improved without spoiling any desirable chemical property of the original elastomer, if polyurethane elastomers which are different only in N%, are mixed together in a specified range of mixing ratio or if a polyurethane elastomer is synthesized using a mixture of polymer glycols whose structural units are chemically the same, however, whose molecular weights are different from each other in a specified range, and a solution of the obtained elastomer is coagulated by a specified wet coagulation condition.
    Type: Grant
    Filed: March 12, 1976
    Date of Patent: May 9, 1978
    Assignee: Kuraray Co., Ltd.
    Inventors: Hideziro Ichimura, Shizuo Tsuchiya, Yoshihiro Tanba