US PATENT SUBCLASS 521 / 88
.~.~.~ Ingredient is ether, alcohol, or inorganic alcoholate, e.g., phenol, etc.

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}
88.~.~.~ Ingredient is ether, alcohol, or inorganic alcoholate, e.g., phenol, etc.

DEFINITION

Classification: 521/88

Ingredient is ether, alcohol, or inorganic alcoholate, e.g., phenol, etc.:

(under subclass 82) Subject matter wherein the stated ingredient contains a -C-O-C- group, a C-OH group (X is an inorganic radical), and wherein none of the carbon atoms which are single bonded to the oxygen atom as enumerated above are double bonded to a chalcogen atom (O, S, Se, or Te) or triple bonded to a nitrogen atom, e.g., epoxy compounds, morpholines, cyclic anhydrides, etc.