Patents by Inventor Ayako OBORA

Ayako OBORA 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).

  • Aqueous surface treatment agent and surface-treated metal
    Patent number: 12497700
    Abstract: The present invention provides an aqueous surface treatment agent which is used for surface treatment of a metal and contains a trivalent chromium compound (A), a water-soluble or water-dispersible acrylic resin (B), a polyfunctional epoxy compound (C) and a phosphoric acid compound (D), wherein: the water-soluble or water-dispersible acrylic resin (B) has a weight average molecular weight of 30,000 to 1,000,000 and a solid acid value of 500 mgKOH/g to 780 mgKOH/g; the ratio of the mass of trivalent chromium contained in the trivalent chromium compound (A) to the total mass of solids is 3% to 15%; the ratio of the mass of solid content of the polyfunctional epoxy compound (C) to the total mass of solids is 1% to 15%; and the ratio of the mass of solid content of the phosphoric acid compound (D) to the total mass of solids is 5% to 25%.
    Type: Grant
    Filed: December 13, 2023
    Date of Patent: December 16, 2025
    Assignee: NIPPON PAINT SURF CHEMICALS CO., LTD.
    Inventors: Akira Utsunomiya, Shota Sasaki, Yuko Wada, Ayako Obora
  • AQUEOUS SURFACE TREATMENT AGENT AND SURFACE-TREATED METAL
    Publication number: 20250263842
    Abstract: The present invention provides an aqueous surface treatment agent which is used for surface treatment of a metal and contains a trivalent chromium compound (A), a water-soluble or water-dispersible acrylic resin (B), a polyfunctional epoxy compound (C) and a phosphoric acid compound (D), wherein: the water-soluble or water-dispersible acrylic resin (B) has a weight average molecular weight of 30,000 to 1,000,000 and a solid acid value of 500 mgKOH/g to 780 mgKOH/g; the ratio of the mass of trivalent chromium contained in the trivalent chromium compound (A) to the total mass of solids is 3% to 15%; the ratio of the mass of solid content of the polyfunctional epoxy compound (C) to the total mass of solids is 1% to 15%; and the ratio of the mass of solid content of the phosphoric acid compound (D) to the total mass of solids is 5% to 25%.
    Type: Application
    Filed: December 13, 2023
    Publication date: August 21, 2025
    Inventors: Akira UTSUNOMIYA, Shota SASAKI, Yuko WADA, Ayako OBORA