US PATENT SUBCLASS 987 / 204
.~.~ S, Se, or Te is bonded directly to the P atom (9/20; 9/20B2; 9/20B4)

Current as of: June, 1999
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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}
203  DF  .~ Pentavalent P containing the structure (Hal)-P(X-C) wherein X is a chalcogen atom (9/14) {2}
204.~.~ S, Se, or Te is bonded directly to the P atom (9/20; 9/20B2; 9/20B4)

DEFINITION

Classification: 987/204

S, Se, or Te is bonded directly to the P atom (9/20; 9/20B2; 9/20B4):

(under subclass 203) Subject matter wherein the X atom of the X-C group is sulfur, selenium, or tellurium.

SEE OR SEARCH THIS CLASS, SUBCLASS:

205, where the X atom of the X-C group is oxygen.