US PATENT SUBCLASS 507 / 140
.~ Contains inorganic component other than water or clay

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.~ Contains inorganic component other than water or clay {5}
141  DF  .~.~> Inorganic component contains soluble potassium salt
142  DF  .~.~> Inorganic component contains phosphorous
143  DF  .~.~> Inorganic component is elemental metal or alloy
144  DF  .~.~> Inorganic component is asbestos
145  DF  .~.~> Inorganic component is soluble in boring medium

DEFINITION

Classification: 507/140

Contains inorganic component other than water or clay:

(under subclass 100) Compositions containing an inorganic component other than water or clay.

(1) Note. The term "clay" encompasses the following: fuller's earth, bentonite, montmorillonite, attapulgite, palygorskite, halloysite, illite, kaolinite, hectorite, sepiolite, etc.

(2) Note. The compositions proper for this and the indented subclasses may contain water or clay, but they must also contain an inorganic component in addition to the water or clay.

(3) Note. For the purposes of this and the indented subclasses, the term "water" does not include seawater brine.

SEE OR SEARCH THIS CLASS, SUBCLASS:

145, for a composition containing normal seawater brine without the addition of any of the components proper for subclasses 100 through 144.