US PATENT SUBCLASS 159 / 36
.~ Steam and furnace heated


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

Internet Version by PATENTEC © 1999      Terms of Use



159 /   HD   CONCENTRATING EVAPORATORS

32  DF  OPEN PANS {6}
36.~ Steam and furnace heated


DEFINITION

Classification: 159/36

(under subclass 32) Open pans in which both steam and furnace are employed as heating agents. Compare with this subclasses 17.1 and 19, where the evaporation is effected at unequal pressure and the heating steam is evolved from the liquid undergoing evaporation.