US PATENT SUBCLASS 534 / 661
.~.~.~ Heavy metal or aluminum containing

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

*  DD  ORGANIC COMPOUNDS (CLASS 532, SUBCLASS 1) {8}
573  DF  .~ Azo {51}
660  DF  .~.~ Hydroxy and carbonyl of -C00- bonded directly to a monocyclic benzene ring (H or hydroxy may be replaced by a substituted or unsubstituted ammonium ion or a metal) {5}
661.~.~.~ Heavy metal or aluminum containing {2}
662  DF  .~.~.~.~> Hetero ring containing
663  DF  .~.~.~.~> Plural azo groups in the same azo moiety attached indirectly to each other by nonionic bonding

DEFINITION

Classification: 534/661

(under subclass 660) Compounds which include aluminum or a metal with a specific gravity greater than four.

(1) Note. Arsenic is considered a metal for the purpose of this subclass.

(2) Note. Examples of compounds provided for herein are: [figure] [figure]