Concentrating Evaporators Patents (Class 159)
Superheating and pressure release (Class 159/2.1)
Spray type (Class 159/3)
Film type (Class 159/5)
Gaseous blast or current (Class 159/16.1)
Multiple effects (Class 159/17.1)
Combined closed and open pans (Class 159/21)
Closed evaporating chambers (Class 159/22)
Open pans (Class 159/32)
Strainers or skimmers (Class 159/42)
Fluid feed or discharge devices (Class 159/43.1)
Apparatus for graining and separating crystals (Class 159/45)
Preliminary heaters and heat economizers (Class 159/46)
Processes (Class 159/47.1)
Miscellaneous (Class 159/1.1)

Cross-Reference Art Collections

Using vibratory force (Class 159/900)
Promoting circulation (Class 159/901)
Using natural heat (Class 159/902)
Sewage treatment (Class 159/905)
Wick (Class 159/906)

Foreign Patent Art Collections

Class-related foreign documents (Class 159/FOR000)

Digests

Electric heat (Class 159/DIG1)
Entrainment (Class 159/DIG2)
Fluidized bed (Class 159/DIG3)
Foam (Class 159/DIG4)
Freezing (Class 159/DIG5)
Infrared (Class 159/DIG6)
Magnetic coupling (Class 159/DIG7)
Multieffect or multistage (Class 159/DIG8)
Two liquids dried simultaneously (Class 159/DIG9)
Organic (Class 159/DIG10)
Biologicals (Class 159/DIG11)
Radioactive (Class 159/DIG12)
Scale (Class 159/DIG13)
Soap (Class 159/DIG14)
Special material (Class 159/DIG15)
Vacuum (Class 159/DIG16)
Two liquids (Class 159/DIG17)
Accumulator (Class 159/DIG18)
Acid (Class 159/DIG19)
Additive (Class 159/DIG20)
Coating (Class 159/DIG21)
Condensate flashing (Class 159/DIG22)
Cooling (Class 159/DIG23)
Critical (Class 159/DIG24)
Decant, press, centrifuge (Class 159/DIG25)
Electric field (Class 159/DIG26)
Micropores (Class 159/DIG27)
Porous member (Class 159/DIG28)
Pebble bed (Class 159/DIG29)
Desuper heating (Class 159/DIG30)
Deaeration (Class 159/DIG31)
Indirect heat exchange (Class 159/DIG32)
Two liquids, one a heat carrier (Class 159/DIG33)
Caustic (Class 159/DIG34)
Viewports, peepsights, and sightglasses (Class 159/DIG35)
Rabbled hearth (Class 159/DIG36)
Ported (Class 159/DIG37)
Seed (Class 159/DIG38)
Power plant (Class 159/DIG39)
Pumps (Class 159/DIG40)
Removable units (Class 159/DIG41)
Seals (Class 159/DIG42)