US PATENT SUBCLASS 71 / 24
.~.~.~ Peat, humus material, coal, 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}
23  DF  .~.~ From vegetation {1}
24.~.~.~ Peat, humus material, coal, etc.

DEFINITION

Classification: 71/24

(under subclass 23) Processes and products which include humus material, peat, lignite, coal and carbon. Other organic fertilizer values classifiable below may also be present.