US PATENT SUBCLASS 71 / 21
.~.~.~ Guano, stable manure, etc.

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}
15  DF  .~.~ From animal matter {6}
21.~.~.~ Guano, stable manure, etc.

DEFINITION

Classification: 71/21

(under subclass 15) and including guano and animal excretions, generally, as the only types of animal matter present. Other organic fertilizer values, except animal matter such as classified below, may also be present.