US PATENT SUBCLASS 203 / 7
.~ For scale inhibiting or corrosion preventing

Current as of: June, 1999
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203 /   HD   DISTILLATION: PROCESSES, SEPARATORY

6  DF  ADDITION OF MATERIAL TO DISTILLAND TO INHIBIT OR PREVENT REACTION OR TO STABILIZE {2}
7.~ For scale inhibiting or corrosion preventing

DEFINITION

Classification: 203/7

(under subclass 6) Processes directed to adding a substance to inhibit or prevent corrosion of the apparatus and/or to inhibit or prevent scale formation.

SEE OR SEARCH CLASS

196, Mineral Oils: Apparatus,

133, for a mineral oil vaporizer having some special feature of construction.

202, Distillation: Apparatus,

267, for apparatus in terms of the materials of construction. 208, Mineral Oils: Processes and Products,

47, for a process of treating mineral oil including a step to prevent or reduce corrosion or erosion of the apparatus employed in the process and see "SEARCH THIS CLASS, SUBCLASS" and "SEARCH CLASS" thereunder for related fields of search.

252, Compositions,

175+, for water-softening or purifying or scale-inhibiting agents, and subclasses 387+ for anti-corrosion agents.