US PATENT SUBCLASS 526 / 275
.~.~.~ Phosphorus is part of a ring


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526 /   HD   SYNTHETIC RESINS OR NATURAL RUBBERS -- PART OF THE CLASS 520 SERIES

*  DD  SYNTHETIC RESINS (Class 520, Subclass 1) {8}
72  DF  .~ POLYMERS FROM ONLY ETHYLENIC MONOMERS OR PROCESSES OF POLYMERIZING, POLYMERIZABLE COMPOSITIONS CONTAINING ONLY ETHYLENIC MONOMERS AS REACTANTS OR PROCESSES OF PREPARING {43}
274  DF  .~.~ From monomer containing a phosphorus atom {3}
275.~.~.~ Phosphorus is part of a ring


DEFINITION

Classification: 526/275

(under subclass 274) Subject matter wherein the phosphorus atom is part of a ring system.

SEE OR SEARCH THIS CLASS, SUBCLASS:

258+, for an unsaturated monomer containing a nitrogen atom in a heterocyclic ring.

266+, for an unsaturated monomer containing an oxygen atom in a heterocyclic ring.