US PATENT SUBCLASS 987 / 101
.~.~.~.~.~ C atom of ring is bonded directly to a hetero atom other than N and which hetero atom is bonded directly to a P atom (9/58K2)

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}
49  DF  .~ Ring is devoid of a P or a metal atom and contains at least one hereto atom (O, S, N, Se, or Te) and may or may not contain C (9/547; 9/6524) {9}
90  DF  .~.~ Single N as only hetero atom in ring (9/553; 9/568) {6}
92  DF  .~.~.~ Six atoms in ring containing the single N atom (9/576) {5}
99  DF  .~.~.~.~ Pyridine ring (9/58; 9/58G; 9/58R) {3}
101.~.~.~.~.~ C atom of ring is bonded directly to a hetero atom other than N and which hetero atom is bonded directly to a P atom (9/58K2)

DEFINITION

Classification: 987/101

C atom of ring is bonded directly to a hetero atom other than N and which hetero atom is bonded directly to a P atom (9/58K2):

(under subclass 99) Subject matter wherein the nitrogen atom of the pyridine ring is bonded directly to an extracyclic hetero atom other than nitrogen and which hetero atom is directly bonded to an extracyclic phosphorus atom.