US PATENT SUBCLASS 131 / 335
.~ By adding constituent to smoke stream

Current as of: June, 1999
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131 /   HD   TOBACCO

331  DF  SMOKE SEPARATOR OR TREATER {9}
335.~ By adding constituent to smoke stream {2}
336  DF  .~.~> Air
337  DF  .~.~> Having destructible, fusible, soluble, or deformable container for treatment material

DEFINITION

Classification: 131/335

By adding constituent to smoke stream:

(under subclass 331) Product or process wherein the separator or treater is a means which allows the addition of a heretofore not present constituent to the smoke stream.