US PATENT SUBCLASS 556 / 105
.~.~.~ Containing -C(=X)X-, wherein the X's are the same or diverse chalcogens

Current as of: June, 1999
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556 /   HD   ORGANIC COMPOUNDS -- PART OF THE CLASS 532-570 SERIES

*  DD  ORGANIC COMPOUNDS (Class 532, Subclass 1) {3}
1  DF  .~ HEAVY METAL CONTAINING (e.g., Ga, In or T1, etc.) {19}
81  DF  .~.~ Germanium, tin, or lead containing (Ge, Sn, or Pb) {6}
105.~.~.~ Containing -C(=X)X-, wherein the X's are the same or diverse chalcogens {2}
106  DF  .~.~.~.~> Carbocyclic ring bonded directly to the carbon of the -C(=X)X- group (e.g., lead phthalates, etc.)
107  DF  .~.~.~.~> Nitrogen containing

DEFINITION

Classification: 556/105

(under subclass 81) Compounds which contain a -C(=X)X- group, wherein the X's are the same or diverse chalcogens (i.e., oxygen, sulfur, selenium or tellurium).