US PATENT SUBCLASS 208 / 425
.~.~ Including centrifugation, filtering, flotation or vibration

Current as of: June, 1999
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208 /   HD   MINERAL OILS: PROCESSES AND PRODUCTS

400  DF  BY TREATMENT OF SOLID MINERAL, E.G., COAL LIQUEFACTION, ETC. {13}
424  DF  .~ Specified procedure to improve separation of solids from liquid product {1}
425.~.~ Including centrifugation, filtering, flotation or vibration

DEFINITION

Classification: 208/425

Including centrifugation, filtering, flotation or vibration:

(under subclass 424) Subject matter wherein the specified procedure includes the use of centrifugal force, shaking, or the attachment of gas bubbles to a solid, or the passage of liquid through a septum which holds back solids of a certain size.

SEE OR SEARCH THIS CLASS, SUBCLASS:

402, for a process which involves the use of sonic or supersonic vibrations.