US PATENT SUBCLASS 99 / 454
.~.~ By vacuum

Current as of: June, 1999
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99 /   HD   FOODS AND BEVERAGES: APPARATUS

452  DF  MECHANICAL, FLUID OR HEAT TREATMENT OF DAIRY FOOD {3}
453  DF  .~ With temperature or atmosphere modification {2}
454.~.~ By vacuum

DEFINITION

Classification: 99/454

(under subclass 453) Device including means for withdrawing gaseous matter from a chamber that encloses the food to produce a sub-atmospheric pressure within the chamber.

SEE OR SEARCH THIS CLASS, SUBCLASS:

472, for other vacuum-producing means associated with apparatus of this class.

SEE OR SEARCH CLASS

53, Package Making,

510+, for treating the contents of a container by means of a vacuum or an inert atmosphere.