Patents by Inventor Shiro Narasaki

Shiro Narasaki 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).

  • Process for the preparation of a graft copolymer including a monomer of esters of unsaturated carboxylic acids or vinyl esters and polyamide oligomers
    Patent number: 5300548
    Abstract: Disclosed herein are a novel graft copolymer comprising a stock copolymer (A) of at least one monomer selected from esters of unsaturated carboxylic acids and vinyl esters (a), ethylene (b) and carbon monoxide (c), and a polyamide oligomer having a primary amino group at one end of its molecule (B) grafted on said stock copolymer, and a process for the preparation thereof. The proposed graft copolymer, when used as an adhesive, in particular for adhesion of polyvinyl chloride, exhibits excellent heat resistance and adhesion properties.
    Type: Grant
    Filed: October 27, 1992
    Date of Patent: April 5, 1994
    Assignee: Du Pont-Mitsui Polychemicals Co., Ltd.
    Inventors: Hideo Akimoto, Shiro Narasaki, Reiji Miyamoto
  • Graft copolymer and process for the preparation thereof and use
    Patent number: 5049626
    Abstract: Disclosed herein are a novel graft copolymer comprising a stock copolymer (A) of at least one monomer selected from esters of unsaturated carboxylic acids and vinyl esters (a), ethylene (b) and carbon monoxide (c), and a polyamide oligomer having a primary amino group at one end of its molecule (B) grafted on said stock copolymer, and a process for the preparation thereof. The proposed graft copolymer, when used as an adhesive, in particular for adhesion of polyvinyl chloride, exhibits excellent heat resistance and adhesion properties.
    Type: Grant
    Filed: September 6, 1989
    Date of Patent: September 17, 1991
    Assignee: Du Pont-Mitsui Polychemicals Co., Ltd.
    Inventors: Hideo Akimoto, Shiro Narasaki, Reiji Miyamoto
  • Coated glass bottles
    Patent number: 4099638
    Abstract: Glass bottles, suitable as containers for drinks, such as beer and fruit juice, are coated with a single layer of a thermally cured material formed of a powdery composition comprising a mixture of (i) a blocked organic polyisocyanate and (ii) a hydrolyzed ethylene-vinyl ester copolymer and/or a carboxyl-modified version of said hydrolyzed copolymer. The coated bottles are highly effective in the prevention of scattering of glass fragments in the event of breakage and excellent in clarity, alkali resistance, abrasion resistance, scratch resistance and weathering quality.
    Type: Grant
    Filed: March 7, 1977
    Date of Patent: July 11, 1978
    Assignees: Mitsui Polychemicals, Co., Ltd., Takeda Chemical Industries, Ltd.
    Inventors: Tetsujiro Tatsumi, Reiji Miyamoto, Shiro Narasaki, Seiji Kazama, Michio Tanaka