US PATENT SUBCLASS 162 / 181.1
.~.~ Inorganic

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.~.~ Inorganic {5}
181.2  DF  .~.~.~> Metal salt other than silicate {1}
181.4  DF  .~.~.~> Metal oxide or hydroxide {1}
181.6  DF  .~.~.~> Silicon containing additive other than clay {1}
181.8  DF  .~.~.~> Clay
181.9  DF  .~.~.~> Free metal or free carbon containing

DEFINITION

Classification: 162/181.1

Inorganic:

(under subclass 158) Processes and products which include an inorganic nonfibrous material, other than water.

(1) Note. Many patent in this subclass are directed to processes and products which include a filler. Mere recitation of a filler broadly without identifying the material is not enough to cause classification herein.

SEE OR SEARCH THIS CLASS, SUBCLASS:

162, for processes and products including an inorganic filler or pigment which imparts a color other than white to the product.