US PATENT SUBCLASS 558 / 372
.~.~.~.~ Formaldehyde reactant

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}
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}
357  DF  .~.~ Processes of forming carbon to carbon bond between carbons of two organic reactants {12}
371  DF  .~.~.~ Aldehyde or ketone reactant {2}
372.~.~.~.~ Formaldehyde reactant

DEFINITION

Classification: 558/372

(under subclass 371) Processes wherein formaldehyde is employed as a reactant.

(1) Note. An example of a process provided for herein is: [figure] [figure]