US PATENT SUBCLASS 568 / 40
.~.~.~.~ Group IA or IIA light metal containing

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

*  DD  ORGANIC COMPOUNDS (Class 532, Subclass 1) {4}
18  DF  .~ SULFUR CONTAINING {9}
38  DF  .~.~ Thioethers {5}
39  DF  .~.~.~ Oxygen containing {6}
40.~.~.~.~ Group IA or IIA light metal containing

DEFINITION

Classification: 568/40

(under subclass 39) Compounds which contain a Group IA or IIA metal having a specific gravity less than four.

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