US PATENT SUBCLASS 521 / 87
.~.~.~ Ingredient is aldehyde or ketone

Current as of: June, 1999
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521 /   HD   SYNTHETIC RESINS OR NATURAL RUBBERS -- PART OF THE CLASS 520 SERIES

*  DD  SYNTHETIC RESINS (Class 520, Subclass 1) {3}
50  DF  .~ CELLULAR PRODUCTS OR PROCESSES OF PREPARING A CELLULAR PRODUCT, E.G., FOAMS, PORES, CHANNELS, ETC. {27}
82  DF  .~.~ Process of forming a cellular product subsequent to solid polymer formation in the presence of a stated ingredient, noncellular composition capable of forming a cellular product and containing a stated ingredient, or process of preparing same {14}
87.~.~.~ Ingredient is aldehyde or ketone

DEFINITION

Classification: 521/87

Ingredient is aldehyde or ketone:

(under subclass 82) Subject matter wherein the stated ingredient is a ketone or aldehyde.

(1) Note. See the Glossary for a definition of the terms "aldehyde" and "ketone".

SEE OR SEARCH THIS CLASS, SUBCLASS:

88, for the use of trioxane or paraformaldehyde as stated ingredients.

97, for the use of ketene as a stated ingredient.