US PATENT SUBCLASS 131 / 339
.~ Interior surface causes particular flow characteristic

Current as of: June, 1999
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131 /   HD   TOBACCO

331  DF  SMOKE SEPARATOR OR TREATER {9}
339.~ Interior surface causes particular flow characteristic {1}
340  DF  .~.~> By use of specific filter mass

DEFINITION

Classification: 131/339

Interior surface causes particular flow characteristic:

(under subclass 331) Product or process wherein the means has an internal cavity through which the smoke passes, the cavity having a surface on which the smoke impinges, the surface causing the smoke to assume a preset or prearranged flow path, or flow in a prescribed manner.

SEE OR SEARCH THIS CLASS, SUBCLASS:

209, through 213, 217, and 218, for smoking device, e.g., pipe, having a similar structure for separating the constituent of the smoke.