US PATENT SUBCLASS 528 / 179
.~.~.~ Polymerizing in the presence of a specified material other than a reactant and other than Group IA or Group IIA material as sole metal atom

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}
86  DF  .~ FROM PHENOL, PHENOL ETHER, OR INORGANIC PHENOLATE {15}
176  DF  .~.~ With polycarboxylic acid or derivative as reactant {8}
179.~.~.~ Polymerizing in the presence of a specified material other than a reactant and other than Group IA or Group IIA material as sole metal atom {2}
180  DF  .~.~.~.~> Material contains a metal atom {1}
182  DF  .~.~.~.~> Material is a nitrogen-containing compound

DEFINITION

Classification: 528/179

(under subclass 176) Subject matter wherein a phenol, phenol ether, or inorganic phenolate is reacted with at least one reactant which is a polycarboxylic acid or polycarboxylic acid derivative in the presence of a specified material.

(1) Note.

(A)

For purposes of this subclass non-reactant materials (specified materials) which are present during a polymerization reaction and wherein the only metal atoms therein are Group IA (Li, Na, K, Rb, Cs, Fr) or Group IIA metal atoms (Be, Mg, Ca, Sr, Ba, Ra) or a mixture thereof, are not considered as being specified materials.

(B) Compounds which contain at least one Group IA or Group IIA and at least one other non-Group IA or non-Group IIA metal atom are proper herein and are classified on the basis of the non-Group IA or non-Group IIA metal atom.

(C) A mixture of a metal-containing compound specifically excluded herefrom and another material which can be considered as being a specified material, per se, is classified herein on the basis of specified material, per se.

SEE OR SEARCH CLASS

520, Synthetic Resins or Natural Rubbers, see the Glossary for an explanation of the term "specified material".