US PATENT SUBCLASS 252 / 389.24
.~.~.~.~.~ Trivalent P (e.g., phosphorus acid, phosphites, etc.)

Current as of: June, 1999
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252 /   HD   COMPOSITIONS

380  DF  PRESERVATIVE AGENTS {3}
387  DF  .~ Anti-corrosion {1}
388  DF  .~.~ Organic compound containing {6}
389.1  DF  .~.~.~ Component inorganic or organic comprising element other than C,H,O,N,S, and halogen {10}
389.2  DF  .~.~.~.~ Phosphorus containing {3}
389.24.~.~.~.~.~ Trivalent P (e.g., phosphorus acid, phosphites, etc.)

DEFINITION

Classification: 252/389.24

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

Compositions under subclas 389.2 in which the phosphorus containing compound includes trivalent phosphorous such as phosphorus acid or its salts, the phosphites.