Patents Represented by Attorney Bertram F. Cleeboe

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  • Treatment of zinc surfaces
    Patent number: 4101339
    Abstract: An improved chromium-free zinc surface treatment provides for contacting the surface with an aqueous solution of a thiourea compound and a vegetable tannin at a pH value of from 2 to 6.5. Corrosion resistance and paint receptivity of the surface are enhanced.
    Type: Grant
    Filed: August 25, 1977
    Date of Patent: July 18, 1978
    Assignee: Oxy Metal Industries Corporation
    Inventors: Hideaki Kaneko, Yasushi Miyazaki, Masanori Suzuki