Patents by Inventor Kenji Hizuka

Kenji Hizuka 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).

  • Tin-free steel can body
    Patent number: 4455355
    Abstract: Tin-free steel having a first layer of metallic chromium on a steel base and a second layer of hydrated chromium oxide on the first layer, in which the atomic ratio of sulfur and the atomic ratio of fluorine to the sum of chromium, oxygen, sulfur and fluorine in the second layer are respectively not greater than 2.5 atomic percent and not greater than 10 atomic percent. This tin-free steel can be used for a nylon-adhered can body to be subjected to a hot-packing or retort treatment, since it has excellent lacquer adhesion after aging in hot water and under retort conditions.
    Type: Grant
    Filed: August 5, 1982
    Date of Patent: June 19, 1984
    Assignee: Toyo Kohan Co., Ltd.
    Inventors: Tsuneo Inui, Hitoshi Kuroda, Kenji Hizuka, Fumio Kunishige, Yoshikazu Kondo
  • Process for producing tin-free steel
    Patent number: 4432842
    Abstract: Tin-free steel having a first layer of metallic chromium on a steel base and a second layer of hydrated chromium oxide on the first layer, in which the atomic ratio of sulfur and the atomic ratio of fluorine to the sum of chromium, oxygen, sulfur and fluorine in the second layer are respectively not greater than 2.5 atomic percent and not greater than 10 atomic percent. This tin-free steel can be used for a nylon-adhered can body to be subjected to a hot-packing or retort treatment, since it has excellent lacquer adhesion after aging in hot water and under retort conditions.
    Type: Grant
    Filed: November 23, 1981
    Date of Patent: February 21, 1984
    Assignee: Toyo Kohan Co., Ltd.
    Inventors: Tsuneo Inui, Hitoshi Kuroda, Kenji Hizuka, Fumio Kunishige, Yoshikazu Kondo
  • Method for pretreatment in the production of tin-free steel
    Patent number: 4414078
    Abstract: A method for the pretreatment of tin-free steel which comprises an anodic treatment or an anodic treatment after a cathodic treatment of an acid pickled steel sheet in an alkaline electrolyte with a pH of above 8, said steel sheet consisting of an upper layer of hydrated chromium oxide and a lower layer of metallic chromium. This pretreated tin-free steel has excellent lacquer adhesion after aging in hot water and under retort conditions.
    Type: Grant
    Filed: March 12, 1982
    Date of Patent: November 8, 1983
    Assignee: Toyo Kohan Company, Limited
    Inventors: Nobuyoshi Shimizu, Kinji Saijo, Kenji Hizuka, Tsuneo Inui, Yoshikazu Kondo
  • Method for pretreatment in the production of tin-free steel
    Patent number: 4157944
    Abstract: A method for the pretreatment of tin-free steel which comprises a cathodic treatment after an anodic treatment of a degreased steel sheet in an acid chromate electrolyte, said steel sheet consisting of an upper layer of hydrated chromium oxide and a lower layer of metallic chromium. This pretreated tin-free steel has excellent lacquer adhesion after aging in hot water and under retort conditions.
    Type: Grant
    Filed: June 22, 1978
    Date of Patent: June 12, 1979
    Assignee: Migita Patent Office
    Inventors: Tsuneo Inui, Hitoshi Kuroda, Kenji Hizuka, Hideaki Hamano