US PATENT SUBCLASS 524 / 116
.~.~.~.~.~.~ Phosphorus is part of a covalent ring

Current as of: June, 1999
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524 /   HD   SYNTHETIC RESINS OR NATURAL RUBBERS -- PART OF THE CLASS 520 SERIES

*  DD  SYNTHETIC RESINS (Class 520, Subclass 1) {1}
*  DD  .~ PROCESSES OF PREPARING A DESIRED OR INTENTIONAL COMPOSITION OF AT LEAST ONE NONREACTANT MATERIAL AND AT LEAST ONE SOLID POLYMER OR SPECIFIED INTERMEDIATE CONDENSATION PRODUCT, OR PRODUCT THEREOF (Class 523, subclass 1) {17}
1  DF  .~.~ Adding a NRM to a preformed solid polymer or preformed specified intermediate condensation product, composition thereof; or process of treating or composition thereof {31}
80  DF  .~.~.~ DNRM which is other than silicon dioxide, glass, titanium dioxide, water, halohydrocarbon, hydrocarbon, or elemental carbon {4}
81  DF  .~.~.~.~ Organic DNRM {21}
115  DF  .~.~.~.~.~ Phosphorus organic compound DNRM {8}
116.~.~.~.~.~.~ Phosphorus is part of a covalent ring {1}
117  DF  .~.~.~.~.~.~.~> Oxygen ring atom {2}

DEFINITION

Classification: 524/116

Phosphorus is part of a covalent ring:

(under subclass 115) Subject matter wherein the phosphorus atom is covalently bonded in a ring system.

(1) Note. For purposes of this subclass, a ring system may contain a ring atom other than carbon or phosphorus.

(2) Note. See appropriate subclasses below for a phosphorus atom as part of a chelation ring.