US PATENT SUBCLASS 987 / 216
.~.~ Containing the structure P-(X-unsubstituted alkyl) wherein all of the X atoms in the molecule which are single bonded to the P atom are bound directly to carbon radicals containing only carbon and hydrogen atoms (9/17)

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}
209  DF  .~ Pentavalent P containing the structure P-(X-C) wherein a S, Se, or Te is directly bonded to the P atom and wherein X is chalcogen (X may qualify as the required S, Se, or Te atom) (9/16; 9/165; 9/165A1) {6}
216.~.~ Containing the structure P-(X-unsubstituted alkyl) wherein all of the X atoms in the molecule which are single bonded to the P atom are bound directly to carbon radicals containing only carbon and hydrogen atoms (9/17)

DEFINITION

Classification: 987/216

Containing the structure P-(X-unsubstituted alkyl) wherein all of the X atoms in the molecule which are single bonded to the P atom are bound directly to carbon radicals containing only carbon and hydrogen atoms (9/17):

(under subclass 209) Subject matter wherein all of the carbon atoms which are directly bonded to the X atoms (X is chalcogen) which are directly bonded to the P atom are either substituted solely by hydrogen atoms or are part of a moiety containing only carbon and hydrogen atoms.

(1) Note. This subclass differs from all other subclasses under subclass 209 in that it is proper for those subclasses to have a single one of the required entities. This subclass on the other hand requires that ALL of the groups be presented in the required format.