US PATENT SUBCLASS 987 / 107-- .~.~.~ N atom of four-membered ring containing a single N atom is bonded directly to a P atom or indirectly to a P atom other than through a ring atom of the four-membered ring (9/568E)

US PATENT SUBCLASS 987 / 107
.~.~.~ N atom of four-membered ring containing a single N atom is bonded directly to a P atom or indirectly to a P atom other than through a ring atom of the four-membered ring (9/568E)

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}
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}
107		.~.~.~ N atom of four-membered ring containing a single N atom is bonded directly to a P atom or indirectly to a P atom other than through a ring atom of the four-membered ring (9/568E)

DEFINITION

Classification: 987/107

N atom of four-membered ring containing a single N atom is bonded directly to a P atom or indirectly to a P atom other than through a ring atom of the four-membered ring (9/568E):

(under subclass 90) Subject matter wherein the nitrogen atom of a ring containing a single nitrogen atom and three carbons is bonded directly or indirectly to an extracyclic phosphorus atom.

(1) Note. Indirectly as used in this subclass is meant to exclude compounds wherein a phosphorus atom is first bonded to a ring carbon, either directly or indirectly, and which ring carbon is eventually bonded to a nitrogen atom of the same ring.