US PATENT SUBCLASS 987 / 138
.~.~.~ Contains ring solely composed of carbon atoms or contains an ethylenic group (9/48A2; 9/48A3; 9/48A4)

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}
116  DF  .~ Contains at least one (C)-P bond (9/28) {19}
137  DF  .~.~ Trivalent P having the structure (C)-P-(XH or X-Salt) (XH or X-Salt or H) or pentavalent P having the structure (C)-P(=X) (XH or X-Salt) (XH or X-Salt or H) where X is chalcogen (9/48) {2}
138.~.~.~ Contains ring solely composed of carbon atoms or contains an ethylenic group (9/48A2; 9/48A3; 9/48A4)

DEFINITION

Classification: 987/138

Contains ring solely composed of carbon atoms or contains an ethylenic group (9/48A2; 9/48A3; 9/48A4):

(under subclass 137) Subject matter wherein the compound contains at least one ring containing only carbon atoms or a double or triple bond between adjacent acyclic carbon atoms.