US PATENT SUBCLASS 156 / 331.3
.~.~.~.~.~.~.~ Derived from aldehyde or ketone

Current as of: June, 1999
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156 /   HD   ADHESIVE BONDING AND MISCELLANEOUS CHEMICAL MANUFACTURE

1  DF  METHODS {7}
60  DF  .~ Surface bonding and/or assembly therefor {93}
325  DF  .~.~ Particular adhesive {1}
326  DF  .~.~.~ Organic containing {4}
327  DF  .~.~.~.~ Synthetic resin containing {8}
330.9  DF  .~.~.~.~.~ Nitrogenous resin {4}
331.1  DF  .~.~.~.~.~.~ With polymerization completion, i.e., curing, after assembly {4}
331.3.~.~.~.~.~.~.~ Derived from aldehyde or ketone

DEFINITION

Classification: 156/331.3

Derived from aldehyde or ketone:

(under subclass 331.1) Subject matter wherein the curing or the preparation of the prefinal-polymer involves the reaction of an moiety. [figure]

SEE OR SEARCH THIS CLASS, SUBCLASS:

307.4, for the use of aldehyde-type resins, such as urea-aldehyde resins or melamine-aldehyde resins in "decorative laminate" manufacture involving the impregnation of thin sheets followed by assembling a stack of sheets and curing.