US PATENT SUBCLASS 436 / 79
.~ Li, Na, K, Rb, Cs, Fr, Be, Mg, Ca, Sr, Ba, Ra

Current as of: June, 1999
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436 /   HD   CHEMISTRY: ANALYTICAL AND IMMUNOLOGICAL TESTING

73  DF  METAL OR METAL CONTAINING {9}
79.~ Li, Na, K, Rb, Cs, Fr, Be, Mg, Ca, Sr, Ba, Ra

DEFINITION

Classification: 436/79

Li, Na, K, Rb, Cs, Fr, Be, Mg, Ca, Sr, Ba, Ra:

(under subclass 73) Processes or compositions for the analysis of lithium, sodium, potassium, rubidium, cesium, beryllium, magnesium, calcium, strontium, barium, or radium.

(1) Note. This subclass provides for water hardness tests even though the hardness is indirectly determined as by use of a chelating agent.