Patents by Inventor Koichi Hirase

Koichi Hirase 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).

  • Metal cleaning compositions
    Patent number: 4595519
    Abstract: A metal cleaning composition is provided comprising: a nonionic active agent and/or an anionic active agent having an HLB value ranging from 3 to 18; and a carboxylic acid or salt thereof represented by the formula,R--X--(CH.sub.2).sub.m --COOMin which X represents N--H, N(CH.sub.2).sub.n --COOM or CH--COOM, R represents a saturated or unsaturated aliphatic hydrocarbon group having from 4 to 18 carbon atoms, phenyl group or tolyl group, and M represents a cation; and a five-membered ring compound having either one nitrogen atom and one sulfur atom, or three nitrogen atoms, and/or a quinoline derivative having a hydroxyl group.The composition according to the invention is advantageous in washing steel or copper plates without inducing pitting corrosion on the metal surface being contacted therewith.
    Type: Grant
    Filed: July 20, 1984
    Date of Patent: June 17, 1986
    Assignees: Kao Corporation, Kawasaki Steel Corporation
    Inventors: Tadayoshi Takeno, Koichi Ishii, Koichi Yamane, Kazuo Kita, Toshio Iwasaki, Koichi Hirase