US PATENT SUBCLASS 162 / 181.7
.~.~.~.~ Alkali metal silicate

Current as of: June, 1999
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162 /   HD   PAPER MAKING AND FIBER LIBERATION

100  DF  PROCESSES AND PRODUCTS {31}
158  DF  .~ Non-fiber additive {16}
181.1  DF  .~.~ Inorganic {5}
181.6  DF  .~.~.~ Silicon containing additive other than clay {1}
181.7.~.~.~.~ Alkali metal silicate

DEFINITION

Classification: 162/181.7

Alkai metal silicate:

(under subclass 181.6) Subject matter wherein the silicon containing substance comprises lithium, sodium, potassium, rubidium or cesium silicate.