US PATENT SUBCLASS 558 / 52
.~.~.~ The chalcogen, X, is in a -C(=X)- group

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}
44  DF  .~ Sulfonate esters (i.e., compounds having the sulfonate group, -O-S(=O)(=O) , wherein the single bonded oxygen is bonded directly to carbon, which carbon may be single bonded to any atom but may be multiple bonded only to carbon) {7}
51  DF  .~.~ Chalcogen attached indirectly to the sulfonate group by acyclic nonionic bonding {1}
52.~.~.~ The chalcogen, X, is in a -C(=X)- group

DEFINITION

Classification: 558/52

(under subclass 51) Compounds wherein the chalcogen, X is in the following group:

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