US PATENT SUBCLASS 534 / 690
.~.~.~ 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}
689  DF  .~.~ Stilbene containing {2}
690.~.~.~ Heavy metal or aluminum containing

DEFINITION

Classification: 534/690

(under subclass 689) Compounds which contain 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. An example of a compound provided for herein is: [figure]