US PATENT SUBCLASS 71 / 18
.~.~.~ Horn, hair, feathers, wool, leather, 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}
18.~.~.~ Horn, hair, feathers, wool, leather, etc.

DEFINITION

Classification: 71/18

(under subclass 15) and including animal matter derived from horn, hair, feathers, wool, leather, etc..; other organic fertilizer values except other animal derivatives such as are classified below, may also be included.