US PATENT SUBCLASS 71 / 12
.~.~ From sewage or night soil

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

1  DF  PROCESSES AND PRODUCTS {5}
11  DF  .~ Organic material-containing {6}
12.~.~ From sewage or night soil {1}
13  DF  .~.~.~> With other organic material

DEFINITION

Classification: 71/12

Processes of preparing fertilizer from sewage or night soil, and the corresponding products.

SEE OR SEARCH THIS CLASS, SUBCLASS:

13, if other organic fertilizer materials are included.