Patents by Inventor Shunji Ishizaki

Shunji Ishizaki 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 producing a leather-like sheet with a delicate appearance and a deluxe hand
    Patent number: 4190572
    Abstract: A method of producing a leather-like sheet having a deluxe feeling is provided comprising preparing and fully curing a leather-like sheet comprising a porous substrate consisting of a porous layer of elastomer and/or a porous layer of fibrous material and a nonporous coating layer of elastomer coated in a thickness of 0.5 to 50 .mu. on the surface of said porous substrate, crumpling said fully cured sheet in the absence of tension in a liquid medium and, then, drying the crumpled sheet at a temperature not exceeding 100.degree. C. in the absence of tension.
    Type: Grant
    Filed: September 15, 1978
    Date of Patent: February 26, 1980
    Assignee: Kuraray Co., Ltd.
    Inventors: Takeo Nishimura, Mikihiro Matsui, Tomio Mizuse, Shunji Ishizaki