US PATENT SUBCLASS 131 / 293
.~.~ By chemical reaction

Current as of: June, 1999
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131 /   HD   TOBACCO

290  DF  TOBACCO TREATMENT {8}
291  DF  .~ Puffing {5}
293.~.~ By chemical reaction

DEFINITION

Classification: 131/293

By chemical reaction:

(under subclass 291) Process or Apparatus wherein puffing is accomplished by a chemical reaction within or on the tobacco.

(1) Note. The chemical reaction can be the result of the particular reactant or reactants reacting with each other or with the tobacco.