Cleaning and liquid contact with solids – Processes – Using sequentially applied treating agents
Reexamination Certificate
2010-03-31
2010-11-09
Carrillo, Sharidan (Department: 1711)
Cleaning and liquid contact with solids
Processes
Using sequentially applied treating agents
C134S002000, C134S003000, C134S026000, C134S030000, C134S034000, C134S035000, C134S036000, C134S041000, C134S042000, C510S245000, C510S264000, C510S501000
Reexamination Certificate
active
07828908
ABSTRACT:
A biodegradable acid cleaning composition for cleaning stainless steel, and other surfaces is disclosed. The composition comprises urea sulfate in combination with gluconic acid which serves as a corrosion inhibitor. The composition retains the cleaning and corrosion prevention properties of similar phosphoric acid solutions but is safe for the environment and is less expensive to produce. Applicants have surprisingly found that the traditionally alkaline corrosion inhibitor, gluconic acid, can work effectively in an acidic cleaning composition.
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Carrillo Sharidan
Ecolab USA Inc.
McKee Voorhees & Sease, P.L.C.
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