Metal treatment – Process of modifying or maintaining internal physical... – Processes of coating utilizing a reactive composition which...
Reexamination Certificate
2004-10-29
2009-02-17
King, Roy (Department: 1793)
Metal treatment
Process of modifying or maintaining internal physical...
Processes of coating utilizing a reactive composition which...
C427S427400
Reexamination Certificate
active
07491274
ABSTRACT:
Chromate-free treatments and compositions for applying a conversion or passivation coating for metals, more particularly zinc coated metal surfaces. The methods of the invention comprise contacting the requisite metal surface with a phosphonomethylated polyamine. Other aspects of the invention involve methods and compositions in which the following optional components can be included: fluoacid, silane, inorganic phosphorus, acid, latex film forming component and pH adjustment agent.
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Carey William S.
Melzer Jeffrey I.
Raab Michael T.
Szwajkowski Edmund P.
Chemetall Corp.
King Roy
McAndrews Held & Malloy Ltd.
Zhu Weiping
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