US PATENT SUBCLASS 987 / 41
.~.~.~.~ P(O) group containing ring is part of a condensed or bridged carbocyclic ring system (9/6574A4)

Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use


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}
33  DF  .~ Compound contains a ring which is devoid of a metal atom and contains at least one P atom as ring member (9/6564; 9/6564V; 9/6568; 9/6568B; 9/6568C; 9/6568D; 9/6568E; 9/6568F) {3}
37  DF  .~.~ Ring contains O and P only, or may include in addition to the required O and P, only C (9/6571) {5}
39  DF  .~.~.~ Ring contains a P(O) group as atoms within the ring and wherein all atoms bonded to the P atom within the ring, or extracyclic to the ring, are oxygen (9/6574; 9/6574A1) {2}
41.~.~.~.~ P(O) group containing ring is part of a condensed or bridged carbocyclic ring system (9/6574A4)

DEFINITION

Classification: 987/41

P(O) group containing ring is part of a condensed or bridged carbocyclic ring system (9/6574A4):

(under subclass 39) Subject matter wherein the phosphorus containing ring shares at least two carbon atoms of a carbocyclic ring or taken together with two or more carbocyclic rings forms a ring therewith.

(1) Note. An example of a compound appropriate for this subclass is: [figure]