US PATENT SUBCLASS 526 / 73
.~.~ Polymerization involving two or more specified temperature or pressure conditions

Current as of: June, 1999
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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}
73.~.~ Polymerization involving two or more specified temperature or pressure conditions

DEFINITION

Classification: 526/73

(under subclass 72) Subject matter wherein the polymerization reaction is effected using at least two different pressures or at least two different temperatures.

(1) Note. The temperature or pressure must be increased or decreased under controlled conditions so that the temperature or pressure is maintained for a definite period of time prior to the raising or lowering of the temperature or pressure.

(2) Note. The mere recitation of a range of temperatures or pressures is not considered sufficient to be considered as being different temperatures or pressures.