US PATENT SUBCLASS 536 / 18.2
.~.~.~ Containing -C(=X)X- wherein the X's are the same or diverse chalcogens

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

*  DD  ORGANIC COMPOUNDS (Class 532, Subclass 1) {1}
1.11  DF  .~ Carbohydrates or derivatives {15}
4.1  DF  .~.~ O- or S- Glycosides {29}
18.2.~.~.~ Containing -C(=X)X- wherein the X's are the same or diverse chalcogens

DEFINITION

Classification: 536/18.2

Containing -C(=X)X- wherein the X's are the same or diverse chalcogens:

(under subclass 4.1) Compounds which contain a -C(=X)X- group wherein the X's are the same of diffierent and are O, S, Se, or Te.