Patents by Inventor Seiichi Mima

Seiichi Mima 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).

  • Polymers with high transparency and refractive index and process for production thereof
    Patent number: 4022960
    Abstract: Disclosed are polymers of metal salts of itaconic acid monoester and copolymers of the said metal salts with vinyl monomer, having excellent optical properties such as high refractive index and transparency. The polymers and copolymers are obtained by irradiating with radioactive rays a polymerizable ingredient which is one member selected from the group consisting of (1) one metal salt of itaconic acid monoester, (2) a mixture of two or more metal salts of itaconic acid monoester and (3) a mixture of at least one metal salt of itaconic acid monoester with vinyl monomer. Further, a polymerizable ingredient prepared by adding to the aforementioned polymerizable ingredient a polymerization catalyst is subjected to thermal treatment to produce a polymer.
    Type: Grant
    Filed: March 13, 1973
    Date of Patent: May 10, 1977
    Assignee: Agency of Industrial Science & Technology
    Inventors: Seiichi Mima, Masaru Miya
  • Hydrophilic polymer membranes of polyvinyl alcohol and chitosan
    Patent number: 3962158
    Abstract: Hydrophilic polymer membranes useful as semi-permeable membranes or ultrater membranes, are manufactured by forming a film from an aqueous solution containing polyvinyl alcohol and a chitosan salt and then subjecting the film to an alkali treatment.
    Type: Grant
    Filed: April 1, 1975
    Date of Patent: June 8, 1976
    Assignee: Director-General of the Agency of Industrial Science and Technology
    Inventors: Seiichi Mima, Susumu Yoshikawa, Masaru Miya