US PATENT SUBCLASS 568 / 421
.~.~.~ With preservative or stabilizer

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

*  DD  ORGANIC COMPOUNDS (Class 532, Subclass 1) {4}
300  DF  .~ OXYGEN CONTAINING (E.G., PERCHLORYLBENZENE, ETC.) {11}
420  DF  .~.~ Aldehydes {8}
421.~.~.~ With preservative or stabilizer {1}
422  DF  .~.~.~.~> Formaldehyde with preservative or stabilizer

DEFINITION

Classification: 568/421

(under subclass 420) Products wherein the aldehyde is mixed with a preserving or stabilizing agent which functions to prevent physical or chemical change.