US PATENT SUBCLASS 528 / 308.7
.~.~.~.~.~ Derived from at least two reactants simultaneously containing a C-OH group

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

*  DD  SYNTHETIC RESINS (Class 520, Subclass 1) {23}
271  DF  .~ FROM CARBOXYLIC ACID OR DERIVATIVE THEREOF {10}
272  DF  .~.~ From di- or higher ester of a polycarboxylic acid as sole reactant, or from a polycarboxylic acid or derivative with a compound containing two or more hydroxyl groups or salts thereof {15}
308  DF  .~.~.~ Aryl-containing carboxylic acid or derivative of an aryl-containing dicarboxylic acid {2}
308.6  DF  .~.~.~.~ Contains terephthalic acid or substituted forms thereof {2}
308.7.~.~.~.~.~ Derived from at least two reactants simultaneously containing a C-OH group

DEFINITION

Classification: 528/308.7

Derived from at least two reactants simultaneously containing a C - OH group:

(under subclass 308.6) Subject matter wherein the process involves simultaneously at least two reactants having at least one C - OH group or products thereof.

(1) Note. The two alcohol reactants are not considered to react simultaneously for purposes of this subclass when one reactant has completely reacted with another material before the addition of the second alcohol reactant.

SEE OR SEARCH THIS CLASS, SUBCLASS:

308.6, or 308.8+, for processes involving two reactants containing an alcohol group wherein the two reactants are not involved simultaneously.