US PATENT SUBCLASS 987 / 226
.~.~ Contains two or more P atoms (9/09B)


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}
224  DF  .~ P is pentavalent and contains the structure P-(O-C) or P-(O-Z) where Z indicates an atom other than H (9/09; 9/09A1) {6}
226.~.~ Contains two or more P atoms (9/09B) {1}
227  DF  .~.~.~> Containing the structure P-(O)-C-[K]-C-(O)-P wherein K is an organic residue (9/09A6)


DEFINITION

Classification: 987/226

Contains two or more P atoms (9/09B):

(under subclass 224) Subject matter wherein the compound contains at least two phosphorus atoms.