US PATENT SUBCLASS 34 / 579
.~.~ With means to vary gas or vapor flow

Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use


34 /   HD   DRYING AND GAS OR VAPOR CONTACT WITH SOLIDS

523  DF  APPARATUS {40}
576  DF  .~ With fluid current conveying of treated material {12}
579.~.~ With means to vary gas or vapor flow

DEFINITION

Classification: 34/579

With means to vary gas or vapor flow:

(under subclass 576) Subject matter having a means to control the gas or vapor current, such as a valve.