US PATENT SUBCLASS 987 / 197
.~.~.~ Aryl ring-(X)-P-(N) (9/24A4)

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}
187  DF  .~ Phosphorus directly bonded to N, i.e., P(N) (9/22; 9/22A) {7}
194  DF  .~.~ Contains the structure (N)-P-(X-C) wherein X is chalcogen atom, i.e., estramides (9/24) {7}
197.~.~.~ Aryl ring-(X)-P-(N) (9/24A4) {1}
198  DF  .~.~.~.~> Aryl-(C)n-(X)-P-(N) wherein n is at least one (9/24A7)

DEFINITION

Classification: 987/197

Aryl ring-(X)-P-(N) (9/24A4):

(under subclass 194) Subject matter wherein the C atom which is directly bonded to the X atom is either a ring atom of an aryl ring or is indirectly bonded to a ring atom of an aryl group and wherein the bonding is not through the X atom.