US PATENT SUBCLASS 987 / 92
.~.~.~ Six atoms in ring containing the single N atom (9/576)


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.~.~.~ Six atoms in ring containing the single N atom (9/576) {5}
93  DF  .~.~.~.~> Acridine or hydrogenated acridine ring (9/64)
94  DF  .~.~.~.~> Isoquinoline or hydrogenated isoquinoline ring (9/62)
95  DF  .~.~.~.~> Quinoline or hydrogenated quinoline ring (9/60)
96  DF  .~.~.~.~> Hydrogenated pyridine ring (9/59; 9/59G; 9/59K; 9/59K2; 9/59K4; 9/59R) {2}
99  DF  .~.~.~.~> Pyridine ring (9/58; 9/58G; 9/58R) {3}


DEFINITION

Classification: 987/92

Six atoms in ring containing the single N atom (9/576):

(under subclass 90) Subject matter wherein a ring contains five carbon atoms and a single nitrogen atom.