US PATENT SUBCLASS 528 / 246
.~.~ Ethylenically unsaturated reactant other than unsaturation solely in heterocyclic ring containing only oxygen as hetero 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}
230  DF  .~ FROM ALDEHYDE OR DERIVATIVE THEREOF AS REACTANT {12}
246.~.~ Ethylenically unsaturated reactant other than unsaturation solely in heterocyclic ring containing only oxygen as hetero atom

DEFINITION

Classification: 528/246

(under subclass 230) Subject matter wherein at least one reactant contains an ethylenically unsaturated group with the proviso that a heterocyclic compound containing only oxygen and carbon atoms as ring members must possess at least one ethylenically unsaturated moiety exterior to the ring.

(1) Note. Excluded herein is furfural, furfuryl alcohol, etc.

(2) Note. A methylene group which is bonded to a

heterocyclic carbon is considered as being exterior to the heterocyclic ring.

(3) Note. The unsaturation required for this subclass may be in the aldehyde or derivative thereof, or may be in a material which is reacted with an aldehyde or derivative.

SEE OR SEARCH CLASS

520, Synthetic Resins or Natural Rubbers, see the Glossary for the definition of the term "ethylenically unsaturated".