Patents by Inventor Katutoshi Arai

Katutoshi Arai 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).

  • Corrosion resistant Zn-Cr plated steel strip
    Patent number: 4897317
    Abstract: A plated steel strip having an enhanced corrosion and rust resistance and an improved paint-coating property comprises a principal plating layer formed on a steel strip substrate and comprising a co-deposited zinc-chromium based alloy which comprises more than 5% by weight but not more than 40% by weight of chromium and the balance of zinc.
    Type: Grant
    Filed: March 29, 1988
    Date of Patent: January 30, 1990
    Assignee: Nippon Steel Corporation
    Inventors: Tatsuya Kanamaru, Motohiro Nakayama, Katutoshi Arai, Shinichi Suzuki, Ryoichi Naka
  • Corrosion resistant plated steel strip and method for producing same
    Patent number: 4877494
    Abstract: A plated steel strip having an enhanced corrosion and rust resistance and an improved paint-coating property comprises a principal plating layer formed on a steel strip substrate and comprising a co-deposited zinc-chromium based alloy which comprises more than 5% by weight but not more than 40% by weight of chromium and the balance of zinc.
    Type: Grant
    Filed: March 7, 1989
    Date of Patent: October 31, 1989
    Assignee: Nippon Steel Corporation
    Inventors: Tatsuya Kanamaru, Motohiro Nakayama, Katutoshi Arai, Shinichi Suzuki, Ryoichi Naka
  • Process for electroplating a metallic material with an iron-zinc alloy
    Patent number: 4578158
    Abstract: A metallic material is electroplated with an iron-zinc alloy with an improved efficiency by using an insoluble anode and an electroplating liquid containing, in addition to necessary amounts of zinc and ferrous ions, 0.01 to 10 g/l of an additive consisting of at least one member selected from oxyalkylene compounds of the formulae (I) to (VIII), ##STR1## and ##STR2## wherein n, n.sup.1 or n.sup.5 =1 to 200,n.sup.2 or n.sup.6 =6 to 2000,n.sup.3 or n.sup.7 =4 to 2000,n.sup.4 =2 to 2000,R or R.sup.3 =alkyl (C.sub.1 -C.sub.20)R.sup.1, R.sup.2, R.sup.4 or R.sup.5 =H or alkyl (C.sub.1 -C.sub.2)and sulfation products of the above-mentioned compounds.
    Type: Grant
    Filed: October 30, 1984
    Date of Patent: March 25, 1986
    Assignee: Nippon Steel Corporation
    Inventors: Tatsuya Kanamaru, Motohiro Nakayama, Yutaka Ogawa, Katutoshi A. Arai