US Patent Class 159
CONCENTRATING EVAPORATORS-- Main Headings



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Current as of: June, 1999
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CLASS NOTES
2.1  DF  SUPERHEATING AND PRESSURE RELEASE {1}
3  DF  SPRAY TYPE {1}
5  DF  FILM TYPE {4}
16.1  DF  GASEOUS BLAST OR CURRENT {2}
17.1  DF  MULTIPLE EFFECTS {6}
21  DF  COMBINED CLOSED AND OPEN PANS
22  DF  CLOSED EVAPORATING CHAMBERS {4}
32  DF  OPEN PANS {6}
42  DF  STRAINERS OR SKIMMERS
43.1  DF  FLUID FEED OR DISCHARGE DEVICES {2}
45  DF  APPARATUS FOR GRAINING AND SEPARATING CRYSTALS
46  DF  PRELIMINARY HEATERS AND HEAT ECONOMIZERS
47.1  DF  PROCESSES {4}
1.1  DF  MISCELLANEOUS
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CROSS-REFERENCE ART COLLECTIONS
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900  DF  USING VIBRATORY FORCE
901  DF  PROMOTING CIRCULATION
902  DF  USING NATURAL HEAT {1}
905  DF  SEWAGE TREATMENT
906  DF  WICK
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DIGESTS
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DIG 1  DF  Electric heat
DIG 2  DF  Entrainment
DIG 3  DF  Fluidized bed
DIG 4  DF  Foam
DIG 5  DF  Freezing
DIG 6  DF  Infrared
DIG 7  DF  Magnetic coupling
DIG 8  DF  Multieffect or multistage
DIG 9  DF  Two liquids dried simultaneously
DIG 10  DF  Organic
DIG 11  DF  Biologicals
DIG 12  DF  Radioactive
DIG 13  DF  Scale
DIG 14  DF  Soap
DIG 15  DF  Special material
DIG 16  DF  Vacuum
DIG 17  DF  Two liquids
DIG 18  DF  Accumulator
DIG 19  DF  Acid
DIG 20  DF  Additive
DIG 21  DF  Coating
DIG 22  DF  Condensate flashing
DIG 23  DF  Cooling
DIG 24  DF  Critical
DIG 25  DF  Decant, press, centrifuge
DIG 26  DF  Electric field
DIG 27  DF  Micropores
DIG 28  DF  Porous member
DIG 29  DF  Pebble bed
DIG 30  DF  Desuper heating
DIG 31  DF  Deaeration
DIG 32  DF  Indirect heat exchange
DIG 33  DF  Two liquids, one a heat carrier
DIG 34  DF  Caustic
DIG 35  DF  Viewports, peepsights, and sightglasses
DIG 36  DF  Rabbled hearth
DIG 37  DF  Ported
DIG 38  DF  Seed
DIG 39  DF  Power plant
DIG 40  DF  Pumps
DIG 41  DF  Removable units
DIG 42  DF  Seals