US PATENT SUBCLASS 131 / 291
.~ Puffing

Current as of: June, 1999
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131 /   HD   TOBACCO

290  DF  TOBACCO TREATMENT {8}
291.~ Puffing {5}
292  DF  .~.~> Including freeze drying
293  DF  .~.~> By chemical reaction
294  DF  .~.~> By radiant energy
295  DF  .~.~> By high frequency field
296  DF  .~.~> By contact with hot gaseous medium

DEFINITION

Classification: 131/291

Puffing:

(under subclass 290) Process or apparatus designed to effect an increase in the volume of the tobacco.

SEE OR SEARCH CLASS

99, Foods and Beverages: Apparatus,

323.4+, for puffing apparatus.

426, Food or Edible Material: Processes, Compositions, and Products,

445+, for the puffing of food by heating.