US PATENT SUBCLASS 558 / 23
.~.~ Chalcogen bonded directly to the sulfate 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}
20  DF  .~ Sulfate esters ( i.e., compounds having the sulfate group, -O-S(=O)(=O)O-, bonded directly to at least one carbon, which carbon may be single bonded to any atom but may be multiple bonded only to carbon) {11}
23.~.~ Chalcogen bonded directly to the sulfate group

DEFINITION

Classification: 558/23

(under subclass 20) Compounds in which the sulfate group is bonded directly to chalcogen (i.e., oxygen, sulfur, selenium, or tellurium).

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