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| Class 159 | CONCENTRATING EVAPORATORS |
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![[List of Pre Grant Publications for class 159 subclass 2.1]](../as.gif) | ![[List of Patents for class 159 subclass 2.1]](../ps.gif) | 2.1 | SUPERHEATING AND PRESSURE RELEASE |
| | 3 | SPRAY TYPE |
| | 5 | FILM TYPE |
| | 16.1 | GASEOUS BLAST OR CURRENT |
| | 17.1 | MULTIPLE EFFECTS |
| | 17.2 |  Parallel fluid flow |
| | 17.3 | Variant multistaging |
| | 17.4 | Contiguous evaporators |
| | 18 | Superimposed |
| | 19 | Combined closed and open |
| | 20.1 | Variable or counterflow |
| | 21 | COMBINED CLOSED AND OPEN PANS |
| | 22 | CLOSED EVAPORATING CHAMBERS |
| | 23 | Indirectly heated |
| | 24.1 |  Regenerative |
| | 25.1 | Rotatable agitator or coil |
| | 26.1 | Heated tube |
| | 28.1 | Heating elements |
| | 29 | Directly heated |
| | 30 | Samplers |
| | 31 | Liquid traps or separators |
| | 32 | OPEN PANS |
| | 33 | With rakes |
| | 34 | Tiltable, removable, or portable |
| | 35 | Interposed liquid receptacle |
| | 36 | Steam and furnace heated |
| | 37 | Steam heated |
| | 38 | Furnace heated |
| | 42 | STRAINERS OR SKIMMERS |
| | 43.1 | FLUID FEED OR DISCHARGE DEVICES |
| | 45 | APPARATUS FOR GRAINING AND SEPARATING CRYSTALS |
| | 46 | PRELIMINARY HEATERS AND HEAT ECONOMIZERS |
| | 47.1 | PROCESSES |
| | 1.1 | MISCELLANEOUS |
| CROSS-REFERENCE ART COLLECTIONS | ||
| | 900 | USING VIBRATORY FORCE |
| | 901 | PROMOTING CIRCULATION |
| | 902 | USING NATURAL HEAT |
| | 905 | SEWAGE TREATMENT |
| | 906 | WICK |
| FOREIGN ART COLLECTIONS | ||
| FOR000 | CLASS-RELATED FOREIGN DOCUMENTS |
| DIGESTS | ||
| | DIG1 | ELECTRIC HEAT |
| | DIG2 | ENTRAINMENT |
| | DIG3 | FLUIDIZED BED |
| | DIG4 | FOAM |
| | DIG5 | FREEZING |
| | DIG6 | INFRARED |
| | DIG7 | MAGNETIC COUPLING |
| | DIG8 | MULTIEFFECT OR MULTISTAGE |
| | DIG9 | TWO LIQUIDS DRIED SIMULTANEOUSLY |
| | DIG10 | ORGANIC |
| | DIG11 | BIOLOGICALS |
| | DIG12 | RADIOACTIVE |
| | DIG13 | SCALE |
| | DIG14 | SOAP |
| | DIG15 | SPECIAL MATERIAL |
| | DIG16 | VACUUM |
| | DIG17 | TWO LIQUIDS |
| | DIG18 | ACCUMULATOR |
| | DIG19 | ACID |
| | DIG20 | ADDITIVE |
| | DIG21 | COATING |
| | DIG22 | CONDENSATE FLASHING |
| | DIG23 | COOLING |
| | DIG24 | CRITICAL |
| | DIG25 | DECANT, PRESS, CENTRIFUGE |
| | DIG26 | ELECTRIC FIELD |
| | DIG27 | MICROPORES |
| | DIG28 | POROUS MEMBER |
| | DIG29 | PEBBLE BED |
| | DIG30 | DESUPER HEATING |
| | DIG31 | DEAERATION |
| | DIG32 | INDIRECT HEAT EXCHANGE |
| | DIG33 | TWO LIQUIDS, ONE A HEAT CARRIER |
| | DIG34 | CAUSTIC |
| | DIG35 | VIEWPORTS, PEEPSIGHTS, AND SIGHTGLASSES |
| | DIG36 | RABBLED HEARTH |
| | DIG37 | PORTED |
| | DIG38 | SEED |
| | DIG39 | POWER PLANT |
| | DIG40 | PUMPS |
| | DIG41 | REMOVABLE UNITS |
| | DIG42 | SEALS |
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