Patents by Inventor Toyomi Akiyama

Toyomi Akiyama 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).

  • Electrostatic recording material
    Patent number: 4081583
    Abstract: An electrostatic recording material having a good workability and a very good recording characteristic is prepared by coating such a base sheet as paper, plastic film, metal plate, etc.
    Type: Grant
    Filed: December 17, 1974
    Date of Patent: March 28, 1978
    Assignees: Japan Synthetic Rubber Co., Ltd., Kanzaki Paper Manufacturing Co., Ltd.
    Inventors: Toyomi Akiyama, Taiji Higaki, Eiichiro Shiratsuchi, Eijiro Tagami
  • Electrostatic recording material and method for preparing the same
    Patent number: 4081584
    Abstract: An electrostatic recording material having a good workability and a very good recording characteristic is prepared by coating such a base sheet as paper, plastic film, metal plate, etc. with an aqueous dispersion comprising (A) 100 parts by weight of at least one water-insoluble polymer comprising at least one monomer selected from ethylenic monomers and conjugated diolefinic monomers, and (B) 1-200 parts by weight of at least one water-soluble salt of polymer containing carboxyl groups by means of an air knife coater, roll coater, etc. It is possible to use not more than 6 parts by weight of the heretofore well-known nonionic emulsifier and/or the well-known anionic emulsifier together with said component.
    Type: Grant
    Filed: December 17, 1974
    Date of Patent: March 28, 1978
    Assignees: Japan Synthetic Rubber Co., Ltd., Kanzaki Paper Manufacturing Co., Ltd.
    Inventors: Toyomi Akiyama, Taiji Higaki, Eiichiro Shiratsuchi, Eijiro Tagami