US PATENT SUBCLASS 71 / 42
.~.~.~.~ Alkaline treatment

Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use


71 /   HD   CHEMISTRY: FERTILIZERS

1  DF  PROCESSES AND PRODUCTS {5}
31  DF  .~ Inorganic material {5}
32  DF  .~.~ Phosphorus-containing {1}
33  DF  .~.~.~ Phosphates {6}
42.~.~.~.~ Alkaline treatment

DEFINITION

Classification: 71/42

(under subclass 33) Methods of preparing phosphate containing fertilizers wherein the starting materials are treated with a distinctly alkaline substance such as the alkali metal oxides, hydroxides and carbonates or the alkaline earth metal oxides or hydroxides.

SEE OR SEARCH THIS CLASS, SUBCLASS:

43, for mere neutralization of an acid fertilizer.

44+, for distinctively high temperature treatment.