US PATENT SUBCLASS 95 / 57
ELECTRIC OR ELECTROSTATIC FIELD (E.G., ELECTROSTATIC PRECIPITATION, ETC.)

Current as of: June, 1999
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95 /   HD   GAS SEPARATION: PROCESSES

57ELECTRIC OR ELECTROSTATIC FIELD (E.G., ELECTROSTATIC PRECIPITATION, ETC.) {9}
58  DF  .~> With addition of solid, gas, or vapor {4}
63  DF  .~> And nonelectrical separation of fluid mixture {5}
71  DF  .~> With addition of liquid to gaseous fluid mixture {1}
73  DF  .~> With heating or cooling
74  DF  .~> With cleaning of collector electrode {2}
77  DF  .~> Continuously moving electrode
78  DF  .~> Including baffling, deflection, or restriction of gas flow
79  DF  .~> Plural separate stages or zones (e.g., separate ionization and collection regions, etc.) {1}
81  DF  .~> Pulsing or time-varying electric field (e.g., AC, pulsed DC, etc.)

DEFINITION

Classification: 95/57

ELECTRIC OR ELECTROSTATIC FIELD (E.G., ELECTROSTATIC PRECIPITATION, ETC.):

(under the class definition) Process in which an electric current is discharged into the fluid mixture or the fluid mixture is contacted with a fluid or solid which has been electrified.

(1) Note. The separation of the fluid mixture need not be accomplished directly by the electrical treatment, provided that the overall process results in separation of the fluid mixture. The electrical treatment may be for the purpose of causing entrained particles to become agglomerated for easier removal by other means, such as filtration or deflection.

(2) Note. Gas separation processes including the mere application of electricity to a material contacting the fluid mixture for the purpose of resistance heating is classified below.

(3) Note. Processes for separating isotopes are classified

based upon the specific methods used (e.g., the separation of liquid isotopes by distillation is classified in Class 203, subclass 5; isotope separation involving chemical reaction brought about by wave energy is found in Class 204, subclasses 157.2+, etc.).

SEE OR SEARCH THIS CLASS, SUBCLASS:

2+, for processes involving an electric field with control responsive to sensed condition.

25, for processes involving an electric field with recording or signaling of a condition. 26, for processes involving an electric field with timing of an operation.

SEE OR SEARCH CLASS

96, Gas Separation: Apparatus,

15+, for apparatus using an electric field to separate gas constituents. Also, see other collected search class notes regarding related subject matter.

204, Chemistry: Electrical and Wave Energy,

164+, for processes involving gas treatment by chemical reaction and electrical discharge or chemical change by electrical discharge, and subclasses 554+ and 660+ for similar processes and apparatus for electrical separation or purification of liquids and for degasification of liquid aided by electrical discharge involving the conversion of constituents to other compounds. When such chemical conversion is in doubt, placement of electrical processes and apparatus for degasifying liquid is proper for Class 95 or Class 96, respectively.

209, Classifying, Separating, and Assorting Solids,

12.2, for a combination process or apparatus of classifying, separating, and assorting solids including an electrostatic field; and subclasses 127.1+ for process and apparatus for classifying, separating, or assorting solids by an electrostatic field.

210, Liquid Purification or Separation,

748, for processes of treating a liquid by directly subjecting the liquid to an electric field or a current or to a regular pulsating source of energy. Also, see the search class note to Class 204.

250, Radiant Energy,

282+, for methods of separating certain accelerated ionized material from similar accelerated ionized material having different mass-to-electric-charge ratios by use of electrostatic or magnetic fields.