Patents by Inventor Setsuo Baba

Setsuo Baba 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 sulfur containing color-free transparent (metha) acrylate polymer having high visible light transmittance
    Patent number: 5767212
    Abstract: The present invention relates to a method of producing a sulfur-containing transparent polymer by polymerizing a composition containing a (metha)acrylate monomer having sulfur in its molecule, characterized by radical polymerization of a composition containing at least one compound selected from radical chain transfer compounds and radical trapping compounds in an amount of 0.1 to 7.0% by weight of the total amount of the composition. The polymer obtained by polymerization is less colored. The method can provide a polymer having a high total light transmittance, a high refractive index and a light weight and is hardly yellowed during use.
    Type: Grant
    Filed: December 31, 1996
    Date of Patent: June 16, 1998
    Assignee: Toray Industries, Inc.
    Inventors: Yuichiro Iguchi, Setsuo Baba, Koichiro Oka