US PATENT SUBCLASS 429 / 129
.~ Separator, retainer or spacer insulating structure (other than a single porous flat sheet, or either an impregnated or coated sheet not having distinct layers)

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

122  DF  CURRENT PRODUCING CELL, ELEMENTS, SUBCOMBINATIONS AND COMPOSITIONS FOR USE THEREWITH AND ADJUNCTS {16}
129.~ Separator, retainer or spacer insulating structure (other than a single porous flat sheet, or either an impregnated or coated sheet not having distinct layers) {4}
130  DF  .~.~> Insulator structure is only spacer of the rod, button, strip, or frame type
131  DF  .~.~> Having electrode enclosing feature {4}
142  DF  .~.~> Having plural distinct components {2}
146  DF  .~.~> Having electrode spacing projections {1}

DEFINITION

Classification: 429/129

(under subclass 122) Apparatus comprising a structure positioned between or for use between cell electrodes to physically or functionally separate the electrodes. Included in this subclass are separator, retainer, or spaced structures such as rods, buttons, frames, etc., which merely space the electrodes; separators which physically and functionally separate the electrodes and which enclose or envelop the electrodes or a portion thereof in any manner; structures having plural components; and sheet materials which have projection thereon.

(1) Note. To constitute structure for this and indented subclasses, there must be claimed (disclosure) subject matter involving: (a) More than a single porous sheet. (b) Plural layers. (c) Any of the structures specifically set out in the indented subclasses.

SEE OR SEARCH THIS CLASS, SUBCLASS:

247, for separator, retainer, or spacer structures of porous flat sheet materials including impregnated or coated support materials which form a single flat sheet material having essentially uniform porosity. See the search notes thereunder.