US PATENT SUBCLASS 987 / 207
.~ Trivalent P containing the structure P-(X-C) wherein a S, Se, or Te atom is directly bonded to the P atom and wherein X is chalcogen (X may qualify as the required S, Se, or Te atom) (9/201; 9/201A1; 9/202; 9/203)

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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}
207.~ Trivalent P containing the structure P-(X-C) wherein a S, Se, or Te atom is directly bonded to the P atom and wherein X is chalcogen (X may qualify as the required S, Se, or Te atom) (9/201; 9/201A1; 9/202; 9/203) {1}
208  DF  .~.~> Containg the structure P-(X-carbocyclic ring) (9/204; 9/205)

DEFINITION

Classification: 987/207

Trivalent P containing the structure P-(X-C) wherein a S, Se, or Te atom is directly bonded to the P atom and wherein X is chalcogen (X may qualify as the required S, Se, or Te atom) (9/201; 9/201A1; 9/202; 9/203):

(under subclass 30) Subject matter wherein the P atom in the compound is trivalent and where the compound has any of the following structures: P-(S-C), P-(Se-C), P-(Te-C), S-P-(O-C), Se-P-(O-C), Te-P-(O-C) where (a) P is bonded directly to a sulfur, selenium, or tellurium atom and a carbon atom is bonded directly to the sulfur, selenium, or tellurium atom or (b) where an atom of sulfur, selenium, or tellurium is directly bonded to the P atom and a O-C group is also directly bonded to the P atom through the O atom and the carbon atom is directly bonded to the O atom.

(1) Note. It is permissible for the S, Se, or Te atom to be double bonded to the P atom.

SEE OR SEARCH THIS CLASS, SUBCLASS:

217, for a compound devoid of a sulfur, selenium, or tellurium atom directly bonded to the P atom.