Patents by Inventor Hirokazu Ootaka, deceased

Hirokazu Ootaka, deceased 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).

  • Colorant resin composition
    Patent number: 5891539
    Abstract: A molded article or water-supply pipe free from causing dot-like projections or small-diameter blisters on the molded article surface when the molded article is brought into contact with chlorine-containing water is obtained from a resin composition containing a polyolefin resin, a pigment and a copolymer resin obtained from a monomer having an .alpha.,.beta.-unsaturated double bond and a dibasic acid having an unsaturated double bond or an anhydride thereof.
    Type: Grant
    Filed: August 7, 1996
    Date of Patent: April 6, 1999
    Assignee: Toyo Ink Manufacturing Co., Ltd.
    Inventors: Izumi Nakane, Mitsuaki Nakata, Susumu Miyashita, Masashi Koide, Hirokazu Ootaka, deceased, Toshiaki Ootaka, heir