Patents by Inventor Kenji Takoi

Kenji Takoi 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).

  • Light transmitting filament
    Patent number: 3993834
    Abstract: There is provided a filament of improved light transmission having a sheath-core composite structure formed of a methyl methacrylate polymer core material and a fluorine-containing polymer sheath material. The light transmitting filament is characterized in that the methyl methacrylate polymer core material is prepared by the specific procedure of continuous bulk polymerization and subsequent removal of volatile contents, wherein the polymerization is performed in a continuously and thoroughly stirred reaction vessel at a low catalyst concentration and a relatively high temperature and with improved conversion. The light transmitting filament possesses an absorption coefficient (k) of no greater than 6 .times. 10.sup.-.sup.3 cm.sup.-.sup.1.
    Type: Grant
    Filed: November 22, 1974
    Date of Patent: November 23, 1976
    Assignee: Mitsubishi Rayon Co., Ltd.
    Inventors: Kazuya Chimura, Takashi Kaneko, Shunichi Takashima, Ryuichi Nakazono, Masao Kawashima, Hiroyuki Ota, Kenji Tamura, Kazunori Kagawa, Kazushi Shimada, Toru Maeda, Hisao Anzai, Kenji Takoi, Kenichi Sakunaga