US PATENT SUBCLASS 987 / 96
.~.~.~.~ Hydrogenated pyridine ring (9/59; 9/59G; 9/59K; 9/59K2; 9/59K4; 9/59R)

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}
96.~.~.~.~ Hydrogenated pyridine ring (9/59; 9/59G; 9/59K; 9/59K2; 9/59K4; 9/59R) {2}
97  DF  .~.~.~.~.~> Ring is condensed or bridged to a carbocyclic ring system (9/576V)
98  DF  .~.~.~.~.~> N of ring is bonded directly to a P atom or is indirectly bonded to a P atom other than through a ring atom of the hydrogenated pyridine ring (9/59E)

DEFINITION

Classification: 987/96

Hydrogenated pyridine ring (9/59; 9/59G; 9/59K; 9/59K2; 9/59K4; 9/59R):

(under subclass 92) Subject matter wherein the ring system has the following basic structure, and must contain less than three double bonds between ring members: [figure]

SEE OR SEARCH THIS CLASS, SUBCLASS:

99, for ring structures which contain three double bonds between ring members.