Patents by Inventor Tokiko Okamoto

Tokiko Okamoto 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).

  • Patent number: 7723418
    Abstract: An antistatic resin composition and molded products therefrom are described, having good antistatic effect and mechanical strength regardless the type of the molding method. The composition includes a thermoplastic resin (A) and an antistatic agent (B), wherein a refractive index difference between (A) and (B) is not more than 0.02. The antistatic agent (B) includes at least one material selected from the group consisting of (B1) and (B2). (B1) is a polyetheresteramide derived from a polyamide having a Mn of 200-5000 and an alkyleneoxide adduct of bisphenol having a Mn of 300-5000. (B2) is a block polymer having a structure such that blocks of a polyolefin and blocks of a hydrophilic polymer having an volume resistivity of 105-1011 ?·cm are bonded together alternately and repeatedly via at least one bonding mode selected from the group consisting of ester bonding, amide bonding, ether bonding, imide bonding and urethane bonding.
    Type: Grant
    Filed: August 30, 2004
    Date of Patent: May 25, 2010
    Assignee: Sanyo Chemical Industries, Ltd.
    Inventor: Tokiko Okamoto
  • Publication number: 20050049360
    Abstract: An antistatic resin composition and molded products therefrom are described, having good antistatic effect and mechanical strength regardless the type of the molding method. The composition includes a thermoplastic resin (A) and an antistatic agent (B), wherein a refractive index difference between (A) and (B) is not more than 0.02. The antistatic agent (B) includes at least one material selected from the group consisting of (B1) and (B2). (B1) is a polyetheresteramide derived from a polyamide having a Mn of 200-5000 and an alkyleneoxide adduct of bisphenol having a Mn of 300-5000. (B2) is a block polymer having a structure such that blocks of a polyolefin and blocks of a hydrophilic polymer having an volume resistivity of 105-1011 ?·cm are bonded together alternately and repeatedly via at least one bonding mode selected from the group consisting of ester bonding, amide bonding, ether bonding, imide bonding and urethane bonding.
    Type: Application
    Filed: August 30, 2004
    Publication date: March 3, 2005
    Inventor: Tokiko Okamoto