Patents by Inventor Naoki Minorikawa

Naoki Minorikawa 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).

  • 4,4'-bis(methacryloylthio)diphenylsulfide
    Patent number: 5183917
    Abstract: 4,4'-Bis(methacryloylthio)diphenylsulfide having the formula (I): ##STR1## and a curable composition characterized by comprising: (A) 4,4'-bis(methacryloylthio)diphenylsulfide having the above formula (I):(B) (i) another vinyl monomer copolymerizable with 4,4'-bis(methacryloylthio)diphenylsulfide having the above formula (I), and (ii) a polythiol represented by the formula (II):R-(SH).sub.n (II)wherein R is a polyvalent organic group and n represents an integer of 2 or more, wherein the content of the component (B)(i), when the component (B)(i) is present, in the total amount of said components (A), (B)(i) and (B)(ii) is 10 to 90% by weight, and the functional group equivalent ratio of the mercapto groups of the component (B)(ii), when the component (B)(ii) is present, to the methacryloyl groups of the component (A) is from 0.02 to 1.
    Type: Grant
    Filed: June 20, 1990
    Date of Patent: February 2, 1993
    Assignee: Showa Denko K.K.
    Inventors: Satoshi Maruyama, Naoki Minorikawa, Tsutomu Arakawa, Haruo Yoshida, Hirotaka Tagoshi, Kazuto Abe