US PATENT SUBCLASS 429 / 74
.~ Having means to control electrolyte level when liquid is added, other than a visual reference point

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.~ Having means to control electrolyte level when liquid is added, other than a visual reference point {3}
75  DF  .~.~> For different levels
76  DF  .~.~> Float valve
77  DF  .~.~> By establishing an air lock {2}

DEFINITION

Classification: 429/74

(under subclass 72) Apparatus having means to regulate the liquid level of the electrolyte when it is added to the battery.

SEE OR SEARCH THIS CLASS, SUBCLASS:

91, for a battery having measuring testing or indicating means for a liquid level including a visual reference point.