DIFF Subgroup
B01D 1/22 by bringing a thin layer of the liquid into contact with a heated surface
Introduced: September 1968
Full Title
Full titles differ between systems:
IPC:
Evaporating > by bringing a thin layer of the liquid into contact with a heated surface
CPC:
Evaporating ( ; removal of incrustation B08B; preparation of starch C08B30/00; sugar industry C13; prevention of incrustation C23F; drying solid materials or objects by evaporating liquids therefrom F26) > by bringing a thin layer of the liquid into contact with a heated surface
CPC subdivides this area 3x more granularly than IPC with 2 additional codes.
2 codes are CPC-only extensions.
Child Classifications
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