US PATENT SUBCLASS 162 / 101
.~ Pore forming in situ (e.g., gas generation)


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

100  DF  PROCESSES AND PRODUCTS {31}
101.~ Pore forming in situ (e.g., gas generation)


DEFINITION

Classification: 162/101

(under subclass 100) Processes including a step of forming pores or other type of open space in situ within a felted body during or subsequent to the felting operation, and products of such processes.

(1) Note. The pores are usually formed by introducing a gas under pressure to the interior of the felted body or by generating a gas in situ in such body.

SEE OR SEARCH THIS CLASS, SUBCLASS:

158+, particularly subclass 181 for formation of porous paper by the addition of a porous material thereto, e.g., expanded perlite.

SEE OR SEARCH CLASS

106, Compositions: Coating or Plastic,

601+, and 672+ for processes of making various types of coating or plastic compositions, including a step forming pores in situ in the composition. 501, Compositions: Ceramic,

39, and 80+ for pore-forming ceramic compositions.

521, Synthetic Resins or Natural Rubbers,

50+, for pore-forming, per se, in a synthetic resin composition when the composition in which the pores are formed is a synthetic resin.