US PATENT SUBCLASS 429 / 78
.~.~.~ Liquid seal only

Current as of: June, 1999
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429 /   HD   CHEMISTRY: ELECTRICAL CURRENT PRODUCING APPARATUS, PRODUCT, AND PROCESS

72  DF  HAVING SPECIFIED VENTING, FEEDING OR CIRCULATION STRUCTURE (OTHER THAN FEEDING OR FILLING FOR ACTIVATING DEFERRED ACTION-TYPE BATTERY) {5}
74  DF  .~ Having means to control electrolyte level when liquid is added, other than a visual reference point {3}
77  DF  .~.~ By establishing an air lock {2}
78.~.~.~ Liquid seal only

DEFINITION

Classification: 429/78

(under subclass 77) Apparatus wherein a liquid seal only causes the airlock.