US PATENT SUBCLASS 507 / 269
.~ 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

200  DF  WELL TREATING {4}
269.~ Contains inorganic component other than water or clay {8}
270  DF  .~.~> Inorganic component is elemental metal or alloy
271  DF  .~.~> Inorganic component contains Ti, Zr, V, Cr, Mn, Fe, or Ni
272  DF  .~.~> Inorganic component contains copper or zinc
273  DF  .~.~> Inorganic component contains boron
274  DF  .~.~> Inorganic component contains phosphorous
275  DF  .~.~> Inorganic component contains arsenic or antimony
276  DF  .~.~> Inorganic component contains potassium
277  DF  .~.~> Inorganic component is soluble in the well treating medium

DEFINITION

Classification: 507/269

Contains inorganic component other than water or clay:

(under subclass 200) Compositions containing an inorganic component which is neither water nor clay.

(1) 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.

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

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

SEE OR SEARCH THIS CLASS, SUBCLASS:

277, for a composition containing normal seawater brine without the addition of any of the components proper for subclasses 201 through 276 in this class.