Patents Represented by Law Firm Oltrolenk, Faber, Gerb & Soffen
  • Cleaning chemical for aluminium surface
    Patent number: 4857225
    Abstract: The present invention offers a cleaning agent for aluminium surface which is an aqueous acidic liquid containing peroxo acid and/or peroxide in 0.05-10 g/l and further one or more kinds out of sulphuric acid, phosphoric acid and nitric acid.
    Type: Grant
    Filed: January 11, 1988
    Date of Patent: August 15, 1989
    Assignee: Nihon Parkerizing Co., Ltd.
    Inventors: Haruyoshi Terada, Youji Ono, Yokichi Satoh, Hideaki Kaneko