US PATENT SUBCLASS 71 / 10
.~.~.~ Anaerobic

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}
10.~.~.~ Anaerobic

DEFINITION

Classification: 71/10

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

SEE OR SEARCH CLASS

210, Liquid Purification or Separation,

601+, especially 605 and 630 for anaerobic treatment of sewage.