TREA

Han-Yong Oei

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  • Frankfurt, DE
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Patents Grantslast 30 patents

  • Information Patent Grant

    Process of phosphating metal surfaces
    • Patent number 5,039,361
    • Issue date Aug 13, 1991
    • Metallgesellschaft Aktiengesellschaft
    • Dieter Hauffe
    • C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
  • Information Patent Grant

    Process of producing phosphate coatings on metals
    • Patent number 4,824,490
    • Issue date Apr 25, 1989
    • Metallgesellschaft Aktiengesellschaft
    • Han Yong Oei
    • C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
  • Information Patent Grant

    Composition and process for production of phosphate coatings on met...
    • Patent number 4,416,705
    • Issue date Nov 22, 1983
    • Occidental Chemical Corporation
    • Gunter Siemund
    • C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
  • Information Patent Grant

    Preparation of metals for cold forming
    • Patent number 4,199,381
    • Issue date Apr 22, 1980
    • Oxy Metal Industries Corporation
    • Karl-Heinz Nuss
    • C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...