US PATENT SUBCLASS 528 / 137
.~.~.~ Polymerizing in the presence of a specified material other than a reactant

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}
129  DF  .~.~ With aldehyde or derivative {18}
137.~.~.~ Polymerizing in the presence of a specified material other than a reactant {9}
138  DF  .~.~.~.~> Material contains a boron atom
139  DF  .~.~.~.~> Material contains an aluminum or heavy metal atom
140  DF  .~.~.~.~> Material contains a Group IIA metal atom (Be, Mg, Ca, Sr, Ba, Ra)
141  DF  .~.~.~.~> Material contains a phosphorus atom
142  DF  .~.~.~.~> Material contains an alcohol, inorganic alcoholate, or ether
143  DF  .~.~.~.~> Material contains a sulfur atom
144  DF  .~.~.~.~> Material contains a carboxylic acid, anhydride thereof, ester thereof, or salt thereof
145  DF  .~.~.~.~> Material contains a nitrogen compound {1}
147  DF  .~.~.~.~> Material contains a Group IA metal atom (Li, Na, K, Rb, Cs, Fr)

DEFINITION

Classification: 528/137

(under subclass 129) Subject matter wherein a phenol, phenol ether, or inorganic phenolate is reacted with at least one aldehyde or derivative in the presence of a specified material.

SEE OR SEARCH CLASS

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