US PATENT SUBCLASS 436 / 39
DETERMINATION OF WATER

Current as of: June, 1999
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436 /   HD   CHEMISTRY: ANALYTICAL AND IMMUNOLOGICAL TESTING

39DETERMINATION OF WATER {3}
40  DF  .~> In petroleum oil, hydrocarbon oil or organic fluid
41  DF  .~> By use of a cobalt, copper or nickel containing reagent
42  DF  .~> By use of a Karl Fischer reagent

DEFINITION

Classification: 436/39

DETERMINATION OF WATER:

(under the class definition) Processes or compositions for determining the presence or amount of water by means of a chemical reaction.

SEE OR SEARCH CLASS

73, Measuring and Testing,

75, for a process of moisture determination by electrical or thermal conductivity.

236, Automatic Temperature and Humidity Regulation,

44, for processes in which the humidity of area is controlled and subclass 44 for use of an electrically conductive element.

516, Colloid Systems and Wetting Agents; Subcombinations Thereof; Processes of Making, Stabilizing, Breaking, or Inhibiting, appropriate subclasses for subject matter relating to: colloid systems (such as sols*, emulsions, dispersions, foams, aerosols, smokes, gels, or pastes) or wetting agents (such as leveling, penetrating, or spreading); subcombination compositions of colloid systems containing at least an agent specialized and designed for or peculiar to use in making or stabilizing colloid systems; compositions and subcombination compositions specialized and designed for or peculiar to use in breaking (resolving) or inhibiting colloid systems; processes of making the compositions or systems of the class; processes of breaking (resolving) or

inhibiting colloid systems; in each instance, when generically claimed or there is no art class. Class 516 provides for compositions otherwise seemingly proper for Class 436 when the compositions are colloid systems or wetting agents.