US PATENT SUBCLASS 987 / 170
.~.~ Pentavalent P having the structure (C)2-P(=X)(Hal) where X is chalcogen (9/34)

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987 /   HD   ORGANIC COMPOUNDS CONTAINING A Bi, Sb, As, OR P ATOM OR CONTAINING A METAL ATOM OF THE 6TH TO 8TH GROUP OF THE PERIODIC SYSTEM

30  DF  PHOSPHORUS COMPOUNDS (9/02; 9/06) {15}
116  DF  .~ Contains at least one (C)-P bond (9/28) {19}
170.~.~ Pentavalent P having the structure (C)2-P(=X)(Hal) where X is chalcogen (9/34)

DEFINITION

Classification: 987/170

Pentavalent P having the structure (C)2-P (=X)(Hal) where X is chalcogen (9/34):

(under subclass 116) Subject matter wherein the P atom is pentavalent and contains the structure (C)2-P(=X)(Hal), where Hal is halogen.