US PATENT SUBCLASS 252 / 400.24
.~.~.~.~.~ Trivalent P (e.g., phosphorous acid, phosphites, etc.)

Current as of: June, 1999
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252 /   HD   COMPOSITIONS

380  DF  PRESERVATIVE AGENTS {3}
397  DF  .~ Anti-oxidants or chemical change inhibitants {2}
399  DF  .~.~ Organic compound containing {8}
400.1  DF  .~.~.~ Component inorganic or organic comprising element other than C,H,O,N,S, and halogen {8}
400.2  DF  .~.~.~.~ Phosphorus containing {3}
400.24.~.~.~.~.~ Trivalent P (e.g., phosphorous acid, phosphites, etc.)

DEFINITION

Classification: 252/400.24

Trivalent P (e.g., phosphorous acid, phosphites, etc.):

(under subclass 400.2) Compositions in which the phosphorus containing compound includes trivalent phosphorus.