US PATENT SUBCLASS 429 / 247
.~ Separator, retainer, spacer or materials for use therewith

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}
247.~ Separator, retainer, spacer or materials for use therewith {2}
248  DF  .~.~> Having additive for effecting the charge capacity, life, etc., of a cell
249  DF  .~.~> Organic material {5}

DEFINITION

Classification: 429/247

(under subclass 122) Apparatus comprising structure to be used as a separator, retainer, or spacer between the electrodes in a cell.

(1) Note. To constitute structure for this and indented subclasses there must be claimed (disclosure) subject matter involving: (a) a recitation of numerical dimension; (b) a coating on a substrate; and (c) structural connotations such as sheet, mat, fiber, filament, porosity, etc.

SEE OR SEARCH THIS CLASS, SUBCLASS:

129, for separator, retainer, or spacer which is (a) more than a single porous sheet, (b) plural layers, or (c) contains any of the structures specifically set out in the indented subclasses of subclass 129.

SEE OR SEARCH CLASS

210, Liquid Purification or Separation, 500.21, (2) Note., for the lines between this class and other classes with respect to membranes defined by composition.