Cleaning and liquid contact with solids – Processes – Including regeneration – purification – recovery or separation...
Reexamination Certificate
2001-07-23
2004-01-20
Gulakowski, Randy (Department: 1746)
Cleaning and liquid contact with solids
Processes
Including regeneration, purification, recovery or separation...
C134S015000, C134S06400P, C134S109000, C134S118000, C134S067000, C134S086000, C134S067000, C134S067000, C134S067000, C134S067000
Reexamination Certificate
active
06679273
ABSTRACT:
INTRODUCTION
This invention relates to finishing operations involving hot-dip zinc spelter coating strip steel. In its more specific aspects this invention is concerned with minimizing aqueous requirements for caustic cleansing solution supply purposes; and, with substantially-eliminating aqueous waste discharge from surface-cleansing operations.
OBJECTS OF THE INVENTION
An important object is to provide for continuing uniform surface cleansing by maintaining uniform purity-level standards for the cleansing solution.
Another object is to enable minimizing of waste disposal, in particular, substantially-eliminating contaminated waste water disposal.
REFERENCES:
patent: 4175039 (1979-11-01), Fisher
patent: 5830282 (1998-11-01), Olashuk
patent: 6264757 (2001-07-01), Lester et al.
Chaudhry Saeed
Gulakowski Randy
Shanley and Baker
Weirton Steel Corporation
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