Patents by Inventor Ikedal Shoji

Ikedal Shoji 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).

  • Graft polymerization of substituted styrene polymers having pendant vinylidene groups
    Patent number: 4853436
    Abstract: A graft copolymer having a plurality of polymer side chains is disclosed. The starting backbone polymer is a homopolymer or copolymer of a styrene derivative having a pendant vinylidene group on the benzene ring. The graft copolymer may be produced by metallizing said backbone polymer with an alkali metal and then polymerizing an ethylenically unsaturated monomer in the presence of the metallized polymer as an anionic polymerization initiator.
    Type: Grant
    Filed: February 19, 1988
    Date of Patent: August 1, 1989
    Assignee: Nippon Paint Co., Ltd.
    Inventors: Masatoshi Ohata, Koichi Tsutsui, Ikedal Shoji, Teruo Fujimoto