US PATENT SUBCLASS 558 / 448
.~.~.~.~ Plurals oxygens bonded directly to the same carbon (e.g., acetals, etc.)

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558 /   HD   ORGANIC COMPOUNDS -- PART OF THE CLASS 532-570 SERIES

*  DD  ORGANIC COMPOUNDS (Class 532, Subclass 1) {21}
303  DF  .~ Nitriles (i.e., compounds having cyano bonded directly to carbon, which carbon may be single bonded to any atom but may be multiple bonded only to carbon) {21}
435  DF  .~.~ Acyclic (e.g., purification of saturated nitriles, etc.) {9}
447  DF  .~.~.~ Plural carbons bonded directly to the same oxygen {3}
448.~.~.~.~ Plurals oxygens bonded directly to the same carbon (e.g., acetals, etc.)

DEFINITION

Classification: 558/448

(under subclass 447) Compounds wherein the same carbon is bonded directly to plural oxygens.

(1) Note. Examples of compounds provided for herein are: [figure] [figure]