| 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 | DF | .~ Separator, retainer, spacer or materials for use therewith {2} |
| 249 | DF | .~.~ Organic material {5} |
| 251 | | .~.~.~ And inorganic material {1} |
| 252 | DF | .~.~.~.~> Silicon containing |