US PATENT SUBCLASS 528 / 291
.~.~.~.~ Nitrogen-containing polyhydroxy compound or salt of a nitrogen-containing polyhydroxy compound

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}
288  DF  .~.~.~ Nitrogen-containing reactant {4}
291.~.~.~.~ Nitrogen-containing polyhydroxy compound or salt of a nitrogen-containing polyhydroxy compound

DEFINITION

Classification: 528/291

(under subclass 288) Subject matter wherein a nitrogen atom is part of a compound containing two or more hydroxyl groups or is a salt thereof.

SEE OR SEARCH THIS CLASS, SUBCLASS:

288+, for a salt of a non-nitrogen-containing polyhydroxyl compound wherein nitrogen is solely present in the cation moiety.