Patents by Inventor Tatsurou Obi

Tatsurou Obi 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).

  • Method for antirust treatment of steel stocks
    Patent number: 4354881
    Abstract: A steel stock such as hot-rolled pickled steel plate, cold-rolled steel plate, cast iron or the like is subjected to antirust treatment with an aqueous solution or an emulsion consisting mainly of a 1-hydroxybenzotriazole compound represented by the general formula: ##STR1## where X and Y represent hydrogen atoms and hydroxy, alkyl, carboxyl, nitro and sulfonic groups, and further containing one or more of aliphatic dicarboxylic acids added thereto, and having a pH within the range of 7-10.
    Type: Grant
    Filed: May 5, 1981
    Date of Patent: October 19, 1982
    Assignee: Nippon Steel Corporation
    Inventors: Keiichi Tanikawa, Tatsurou Obi, Susumu Otsuka, Isao Manabe, Akiyoshi Inubushi, Chiaki Maeda