US PATENT SUBCLASS 252 / 62.6
.~.~ With Group I metal

Current as of: June, 1999
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252 /   HD   COMPOSITIONS

62.51 R  DF  MAGNETIC {5}
62.56  DF  .~ Iron-oxygen compound containing {5}
62.6.~.~ With Group I metal {1}
62.61  DF  .~.~.~> Lithium

DEFINITION

Classification: 252/62.6

(under subclass 62.56) Composition containing a group I metal in chemically combined form. This subclass and its indent encompasses both subgroups IA and IB and specifically includes lithium (see subclass 62.61), sodium, potassium, rubidium, cesium, francium, copper, silver and gold.