US PATENT SUBCLASS 523 / 347
.~.~ Utilizing plural discrete pressures different than ambient

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

*  DD  SYNTHETIC RESINS (Class 520, Subclass 1) {1}
1  DF  .~ 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 {71}
347.~.~ Utilizing plural discrete pressures different than ambient

DEFINITION

Classification: 523/347

Utilizing plural discrete pressures different than ambient:

(under subclass 1) Subject matter wherein treatment or formation of the desired or intentional composition involves discrete plural steps at pressures different than ambient.

(1) Note. Process steps at ambient pressure can be included herein so long as there are plural steps at nonambient pressure.

(2) Note. Pressure can be elevated or reduced.

(3) Note. A continuous development of pressure is excluded herefrom unless there is a high or low "plateau" stated, e.g., 30 psi operation, increased to 60 psi and operation at 60 psi, etc.