US PATENT SUBCLASS 162 / 128
.~.~.~ Inorganic additive

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

100  DF  PROCESSES AND PRODUCTS {31}
123  DF  .~ Multi-layer waterlaid webs or sheets {3}
125  DF  .~.~ Layers of different properties {4}
128.~.~.~ Inorganic additive

DEFINITION

Classification: 162/128

(under subclass 125) Processes in which at least two layers are associated with different amounts of nonfibrous inorganic material, and the products thereof.

SEE OR SEARCH THIS CLASS, SUBCLASS:

182, for processes of adding nonfibrous inorganic material to a fiber slurry, pulp or wet web.