US PATENT SUBCLASS 525 / 302
.~.~.~.~.~ Oxygen atom is part of a carboxylic acid ester group


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

*  DD  SYNTHETIC RESINS (Class 520, Subclass 1) {4}
50  DF  .~ MIXING OF TWO OR MORE SOLID POLYMERS; MIXING OF SOLID POLYMER OR SICP WITH SICP OR SPFI; MIXING OF SICP WITH AN ETHYLENIC AGENT; MIXING OF SOLID POLYMER WITH A CHEMICAL TREATING OR ETHYLENIC AGENT; OR PROCESSES OF FORMING OR REACTING; OR THE RESULTANT PRODUCT OF ANY OF THE ABOVE OPERATIONS {32}
55  DF  .~.~ At least one solid polymer derived from ethylenic reactants only {25}
242  DF  .~.~.~ Polymer derived from ethylenic reactants only mixed with ethylenic reactant {21}
298  DF  .~.~.~.~ Ethylenic reactant contains an oxygen atom {5}
302.~.~.~.~.~ Oxygen atom is part of a carboxylic acid ester group {5}
303  DF  .~.~.~.~.~.~> Ester contains an oxygen atom other than as a carboxylic acid ester group
304  DF  .~.~.~.~.~.~> Ester contains at least two carboxylic acid ester groups {2}
307  DF  .~.~.~.~.~.~> Ester is derived from an unsaturated carboxylic acid and an unsaturated alcohol
308  DF  .~.~.~.~.~.~> Ester is derived from an unsaturated carboxylic acid {1}
311  DF  .~.~.~.~.~.~> Ester reactant derived from an unsaturated alcohol is reacted in the presence of a solid polymer


DEFINITION

Classification: 525/302

Oxygen atom is part of a carboxylic acid ester group:

(under subclass 298) Subject matter wherein the oxygen atom is part of a carboxylic acid ester group, e.g., vinyl benzoate, etc.