US PATENT SUBCLASS 556 / 183
.~.~.~.~ At least one of the chalcogens is part of a -C(=X)X- group, wherein the X's are the same or diverse chalcogens

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

*  DD  ORGANIC COMPOUNDS (Class 532, Subclass 1) {3}
170  DF  .~ ALUMINUM CONTAINING {11}
181  DF  .~.~ Chalcogen bonded directly to aluminum {1}
182  DF  .~.~.~ Plural chalcogens bonded directly to the same aluminum {2}
183.~.~.~.~ At least one of the chalcogens is part of a -C(=X)X- group, wherein the X's are the same or diverse chalcogens {1}
184  DF  .~.~.~.~.~> Ring bonded directly to the carbon of the -C(=X)X- group

DEFINITION

Classification: 556/183

(under subclass 182) 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.

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

SEE OR SEARCH THIS CLASS, SUBCLASS:

175, for aluminum salts of alfa-hydroxy carboxylic acids, e.g., aluminum lactate: [figure]

, since a consideration of the patents involved does not make unequivocally clear whether the aluminum involved is cyclic or acyclic; and, for aluminum salts of polyaminopolycarboxylic acids, e.g., the aluminum chelate of ethylenediaminetetracetic acid.