Patents by Inventor Kuniyuki Hayasaka

Kuniyuki Hayasaka 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 microporous films
    Patent number: 4191623
    Abstract: Microporous film having a microporous surface layer, and a method of producing it are provided. The method comprises placing a dope containing a film-forming polymer, a solvent therefor and an ionizable organic compound on a support and passing the dope bearing support through a coagulation bath under the application of an electric current. The resultant film has a microporous structure made up of open, vertically elongated and uniform cells.
    Type: Grant
    Filed: December 20, 1977
    Date of Patent: March 4, 1980
    Assignee: Honny Chemicals Company, Limited
    Inventors: Kuniyuki Hayasaka, Yutaka Tamaoka
  • Simulated leather materials and electrolytic process for making them
    Patent number: 4145266
    Abstract: Simulated leather materials are described. These are obtained by treating a substrate having a microporous surface film layer by known processes for producing synthetic leathers. The microporous film is obtained by placing a dope containing film-forming polymer, a solvent therefore and an ionizable organic compound on a support and passing the dope bearing support through a coagulation bath under the application of an electric current. The resultant film has a microporous structure made up of open, vertically elongated and uniform cells which imparts a desirable full hand to the leather-like materials made therefrom.
    Type: Grant
    Filed: February 2, 1978
    Date of Patent: March 20, 1979
    Assignee: Honny Chemicals Co., Ltd.
    Inventors: Kuniyuki Hayasaka, Yutaka Tamaoka