US PATENT SUBCLASS 556 / 94
.~.~.~.~.~ The chalcogen is part of a -C(=X)X- group, 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}
87  DF  .~.~.~ Carbon bonded directly to the metal {2}
88  DF  .~.~.~.~ Chalcogen bonded directly to the metal {2}
94.~.~.~.~.~ The chalcogen is part of a -C(=X)X- group, wherein the X's are the same or diverse chalcogens

DEFINITION

Classification: 556/94

(under subclass 88) Compounds in which the chalcogen is part of a -C(=X)X- group, wherein the X's are the same or diverse chalcogens.