US PATENT SUBCLASS 558 / 261
.~.~ With preservative or stabilizer

Current as of: June, 1999
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558 /   HD   ORGANIC COMPOUNDS -- PART OF THE CLASS 532-570 SERIES

*  DD  ORGANIC COMPOUNDS (Class 532, Subclass 1) {21}
260  DF  .~ Carbonate esters (i.e, compounds having the -O-C(=O)O- group bonded directly to at least one carbon, which carbon may be single bonded to any atom but may be multiple bonded only to carbon) {8}
261.~.~ With preservative or stabilizer

DEFINITION

Classification: 558/261

(under subclass 260) Products wherein the carbonate ester is mixed with a preserving or stabilizing agent whose sole function is to prevent physical or chemical change.