Patents by Inventor Takeshi Kamoto

Takeshi Kamoto 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).

  • Polyester resin, compositions thereof and sealant made therefrom
    Patent number: 5382652
    Abstract: A polyester resin (A) having branched chain, a reduction viscosity (.eta. sp/c) of not less than 0.7, and a Z average molecular weight (Mz) relative to standard polystyrene of not less than 250.times.10.sup.3 and not more than 800.times.10.sup.3, a polyester resin composition comprised of resin (A) and a polyester resin (B) without branched chain and having a reduction viscosity (.eta. sp/c) of not less than 0.7., and a polyester resin composition comprised of resin (A) and a polyester resin (C) having branched chain and a melting point lower than that of the polyester resin (A). The sealant made from the polyester resin (A), or the resin compositions of the present invention is superior in heat-sealing properties, flavor retention, and film moldability (extrusion processing characteristics), and is suitable for a sealant for paper and plastic food containers.
    Type: Grant
    Filed: March 30, 1992
    Date of Patent: January 17, 1995
    Assignee: Toyo Boseki Kabushiki Kaisha
    Inventors: Kouji Fukuda, Shigeharu Sugihara, Takeshi Kamoto, Keiji Mori, Seiki Nishihara, Katsuya Emoto, Toshikazu Nishiwaki, Hiroshi Takeuchi
  • Polyester resin, compositions thereof and sealant made therefrom
    Patent number: RE35939
    Abstract: A polyester resin (A) having branched chain, a reduction viscosity (.eta. sp/c) of not less than 0.7, and a Z average molecular weight (Mz) relative to standard polystyrene of not less than 250.times.10.sup.3 and not more than 800.times.10.sup.3, a polyester resin composition comprised of resin (A) and a polyester resin (B) without branched chain and having a reduction viscosity (.eta. sp/c) of not less than 0.7., and a polyester resin composition comprised of resin (A) and a polyester resin (C) having branched chain and a melting point lower than that of the polyester resin (A). The sealant made from the polyester resin (A), or the resin compositions of the present invention is superior in heat-sealing properties, flavor retention, and film moldability (extrusion processing characteristics), and is suitable for a sealant for paper and plastic food containers.
    Type: Grant
    Filed: January 15, 1997
    Date of Patent: October 27, 1998
    Assignee: Toyo Boseki Kabushiki Kaisha
    Inventors: Kouji Fukuda, Shigeharu Sugihara, Takeshi Kamoto, Keiji Mori, Seiki Nishihara, Katsuya Emoto, Toshikazu Nishiwaki, Hiroshi Takeuchi