US PATENT SUBCLASS 71 / 9
.~.~.~ Aerobic

Current as of: June, 1999
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71 /   HD   CHEMISTRY: FERTILIZERS

1  DF  PROCESSES AND PRODUCTS {5}
6  DF  .~ Bacterial {2}
8  DF  .~.~ Fermentation {2}
9.~.~.~ Aerobic

DEFINITION

Classification: 71/9

(under subclass 8) Processes and compositions where the fermentation is aerobic.

SEE OR SEARCH CLASS

210, Liquid Purification or Separation,

601+, especially 604, 605, 615+, and 620+ for aerobic treatment of sewage.