US PATENT SUBCLASS 510 / 247
.~.~.~ For descaling the inner surface of equipment which is in continuous contact with water (e.g., boiler scale removal; for water storage tank, conduit, etc.)

Current as of: June, 1999
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510 /   HD   CLEANING COMPOSITIONS FOR SOLID SURFACES, AUXILIARY COMPOSITIONS THEREFOR, OR PROCESSES OF PREPARING THE COMPOSITIONS

108  DF  CLEANING COMPOSITIONS OR PROCESSES OF PREPARING (E.G., SODIUM BISULFATE COMPONENT, ETC.) {21}
109  DF  .~ For cleaning a specific substrate or removing a specific contaminant (e.g., for smoker's pipe, etc.) {50}
245  DF  .~.~ For bare metal surface (e.g., degreasing composition, etc.) {9}
247.~.~.~ For descaling the inner surface of equipment which is in continuous contact with water (e.g., boiler scale removal; for water storage tank, conduit, etc.) {3}
248  DF  .~.~.~.~> Free element component (e.g., metal, carbon, sulfur, etc.)
249  DF  .~.~.~.~> Tannin, whole animal or plant material component, or crude extract thereof {3}
253  DF  .~.~.~.~> Free organic or inorganic acid component

DEFINITION

Classification: 510/247

For descaling the inner surface of equipment which is in continuous contact with water (e.g., boiler scale removal; for water storage tank, conduit, etc.):

(under subclass 245) Compositions specialized for removing scale which forms on the inner surface of equipment which in use remains in contact with water.