Patents by Inventor Masanari Matsumura

Masanari Matsumura 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 imparting flame resistance to polyester fiber substrates
    Patent number: 4933412
    Abstract: This invention relates to a flame retardant for synthetic fiber substrates and a method of imparting flame resistance to such substrates using the flame retardant. The flame retardant of this invention comprises 75 to 95 weight parts of a hexabromocyclododecane compound having a melting point not less than 195.degree. C. and 25 to 5 weight parts of a hexabromocyclododecane compound having a melting point less than 160.degree. C., which hexabromocyclododecane compounds are available on bromination of trans-trans-cis-cyclododecatriene. This flame retardant imparts excellent flame resistance to synthetic fiber substrates. Moreover, when a synthetic fiber substrate is dyed using a dye bath containing this flame retardant and a dye, the soiling of the substrate and dyeing equipment is kept at the minimum.
    Type: Grant
    Filed: February 10, 1989
    Date of Patent: June 12, 1990
    Assignee: Dai-Ichi Kogyo Seiyaku Co., Ltd.
    Inventors: Etsuo Ito, Masanari Matsumura, Kazuhiko Ishihara, Toshiaki Doyama