US PATENT SUBCLASS 521 / 136
.~.~.~ At least one polymer is derived from an aldehyde or derivative or wherein the polymer-forming system contains the same type of reactant

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}
134  DF  .~.~ Cellular product derived from two or more solid polymers or from at least one solid polymer and at least one polymer-forming system {6}
136.~.~.~ At least one polymer is derived from an aldehyde or derivative or wherein the polymer-forming system contains the same type of reactant

DEFINITION

Classification: 521/136

At least one polymer is derived from an aldehyde or derivative or wherein the polymer-forming system contains the same type of reactant:

(under subclass 134) Subject matter wherein at least one of the polymers is derived from an aldehyde or aldehyde derivative.

SEE OR SEARCH CLASS

520, Synthetic Resins or Natural Rubbers, the Glossary, for a definition of the term "aldehyde".

528, Synthetic Resins or Natural Rubbers,

230, for a definition of the term "aldehyde derivative".