US PATENT SUBCLASS 522 / 143
.~.~.~.~.~ Hetero oxygen

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

*  DD  SYNTHETIC RESINS (Class 520, Subclass 1) {1}
1  DF  .~ COMPOSITIONS TO BE POLYMERIZED BY WAVE ENERGY WHEREIN SAID COMPOSITION CONTAINS A RATE-AFFECTING MATERIAL; OR COMPOSITIONS TO BE MODIFIED BY WAVE ENERGY WHEREIN SAID COMPOSITION CONTAINS A RATE-AFFECTING MATERIAL; OR PROCESSES OF PREPARING OR TREATING A SOLID POLYMER UTILIZING WAVE ENERGY {27}
134  DF  .~.~ Processes of chemically modifying a solid polymer or SICP derived from at least one saturated monomer by treating solid polymer or SICP with a chemical reactant; or compositions therefor {3}
135  DF  .~.~.~ Chemical reactant is ethylenically unsaturated {3}
141  DF  .~.~.~.~ Chalcogen {3}
143.~.~.~.~.~ Hetero oxygen

DEFINITION

Classification: 522/143

Hetero oxygen:

(under subclass 141) Subject matter wherein the chalcogen reactant contains an oxygen atom which is part of a heterocyclic ring.

(1) Note. See Class 520, Glossary, for a definition of the term "heterocyclic ring".