US PATENT SUBCLASS 556 / 90
.~.~.~.~.~.~ At least one of the chalcogens 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}
89  DF  .~.~.~.~.~ Plural chalcogens bonded directly to the metal {2}
90.~.~.~.~.~.~ At least one of the chalcogens is part of a -C(=X)X- group, wherein the X's are the same or diverse chalcogens {2}
91  DF  .~.~.~.~.~.~.~> Sulfur containing (e.g., organotinmercaptio carboxylic acid ester sulfides, etc.)
92  DF  .~.~.~.~.~.~.~> Acyclic carbon to carbon unsaturation containing (e.g., diorganotin maleates, etc.)

DEFINITION

Classification: 556/90

(under subclass 89) Compounds in which at least one of the chalcogens is part of a -C(=X)X- group, wherein the X's are the same or diverse chalcogens.