US PATENT SUBCLASS 987 / 206
.~ Trivalent P containing the structure (Hal)-P-(X-C) wherein X is a chalcogen atom (9/146; 9/206)

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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}
206.~ Trivalent P containing the structure (Hal)-P-(X-C) wherein X is a chalcogen atom (9/146; 9/206)

DEFINITION

Classification: 987/206

Trivalent P containing the structure (Hal)-P-(X-C) wherein X is a chalcogen atom (9/146; 9/206):

(under subclass 30) Subject matter wherein the P atom is trivalent and the compound has the structure (Hal)-P-(X-C) where at least one halogen atom and at least one X atom (X is chalcogen) are directly bonded to the P atom and a carbon atom is directly bonded to the X atom.