US PATENT SUBCLASS 507 / 145
.~.~ Inorganic component is soluble in boring medium

Current as of: June, 1999
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507 /   HD   EARTH BORING, WELL TREATING, AND OIL FIELD CHEMISTRY

100  DF  EARTH BORING {4}
140  DF  .~ Contains inorganic component other than water or clay {5}
145.~.~ Inorganic component is soluble in boring medium

DEFINITION

Classification: 507/145

Inorganic component is soluble in boring medium:

(under subclass 140) Composition wherein the inorganic component is soluble in the boring medium.

SEE OR SEARCH THIS CLASS, SUBCLASS:

901, and 902-910, for Art Collections pertaining to subclasses 90-145.