Patents by Inventor Takahiro SANDA

Takahiro SANDA 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: 11749971
    Abstract: A metallic shell for a spark plug which metallic shell achieves suppressed elution of hexavalent chromium, and a spark plug including the metallic shell. The spark plug has a metallic shell. The metallic shell includes a tubular metallic shell body; a metal plating layer provided on a surface of the metallic shell body; and a chromium-containing chemical conversion coating layer provided to cover the metal plating layer. The chemical conversion coating layer has a zirconium component content of 0.1 mass % or more.
    Type: Grant
    Filed: February 15, 2023
    Date of Patent: September 5, 2023
    Assignee: NGK SPARK PLUG CO., LTD.
    Inventors: Takahiro Sanda, Keita Sugihara, Noriyasu Hasegawa, Yohei Kozakai
  • Publication number: 20230268722
    Abstract: A metallic shell for a spark plug which metallic shell achieves suppressed elution of hexavalent chromium, and a spark plug including the metallic shell. The spark plug has a metallic shell. The metallic shell includes a tubular metallic shell body; a metal plating layer provided on a surface of the metallic shell body; and a chromium-containing chemical conversion coating layer provided to cover the metal plating layer. The chemical conversion coating layer has a zirconium component content of 0.1 mass % or more.
    Type: Application
    Filed: February 15, 2023
    Publication date: August 24, 2023
    Applicant: NGK SPARK PLUG CO., LTD.
    Inventors: Takahiro SANDA, Keita SUGIHARA, Noriyasu HASEGAWA, Yohei KOZAKAI