Patents by Inventor Seiichro Maruyama

Seiichro Maruyama 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).

  • Patent number: 4514357
    Abstract: A molded article having excellent optical characteristics and obtained by injection molding a resin composition of a bis(hydroxyphenyl)alkane polycarbonate resin having an average molecular weight of 12000 to 18000 and containing 0.005 to 0.5 wt %, based on the resin, of a phosphorous ester represented by the general formula, ##STR1## wherein R.sup.1 and R.sup.2 independently represent an alkyl or aryl group, and R.sup.3 represents hydrogen, an alkyl or aryl group, at a resin temperature of 330.degree. to 400.degree. C. and at a mold temperature of 50.degree. to 110.degree. C., and a method for producing such articles.
    Type: Grant
    Filed: December 15, 1982
    Date of Patent: April 30, 1985
    Assignee: Mitsubishi Chemical Industries, Limited
    Inventors: Yoshikazu Kawaguchi, Seiichro Maruyama, Hiroyuki Kawasaki