US PATENT SUBCLASS 71 / 27
.~.~ From synthetic material

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}
27.~.~ From synthetic material {1}
28  DF  .~.~.~> Urea and its derivatives {2}

DEFINITION

Classification: 71/27

(under subclass 11) Processes which include preparing synthetic organic fertilizers and the corresponding products.

SEE OR SEARCH CLASS

204, Chemistry: Electrical and Wave Energy, for electrical or wave energy methods involving chemical reactions which are caused by more than the mere thermal effects of the electrical or wave energy for synthetic preparation of compounds or elements useful for fertilizer compositions.

205, Electrolysis: Processes, Compositions Used Therein, and Methods of Preparing the Compositions,

334+, for electrolytic synthesis of compounds or elements useful for fertilizer compositions.