| 210 / | HD | LIQUID PURIFICATION OR SEPARATION |
| 294 | DF | DIVERSE DISTINCT SEPARATORS {3} |
| 295 | | .~ Including a filter {5} |
| 296 | DF | .~.~> Including liquid as a separating medium |
| 297 | DF | .~.~> Moving filter medium |
| 298 | DF | .~.~> With mechanical residue or sediment mover |
| 299 | DF | .~.~> Including constituent trapping feature {10} |
| 314 | DF | .~.~> Spaced filters {4} |