US PATENT SUBCLASS 528 / 489
.~.~.~ Oxide or hydroxide

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}
480  DF  .~ TREATING POLYMER CONTAINING MATERIAL OR TREATING A SOLID POLYMER OR A RESINIFIABLE INTERMEDIATE CONDENSATION PRODUCT {14}
488  DF  .~.~ Contacting with alkali (Li, Na, K, Rb, Cs, Fr) or alkaline earth (Be, Mg, Ca, Sr, Ba) metal or compound thereof {1}
489.~.~.~ Oxide or hydroxide

DEFINITION

Classification: 528/489

(under subclass 488) Processes wherein the alkali metal or alkaline earth metal is in the form of an oxide or hydroxide.