What follows are the subclasses from one class of the Manual of Classification for US patents. As you scroll through the list and encounter a class/subclass of interest, you can jump back to the top and retrieve patent titles by entering the class/subclass in the box below.
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363-131 121-55A 14-.5
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Class Number: 159 Class Title: CONCENTRATING EVAPORATORS Subclass Subclass Number Title 2.1 SUPERHEATING AND PRESSURE RELEASE 2.2 .With extruder 2.3 ..Multistage 3 SPRAY TYPE 4.01 .Gaseous current 4.02 ..Combustion product gas 4.03 ..Antibridging 4.04 ..Countercurrent 4.05 ..Intermediate gas outlet or inlet 4.06 ..Bottom sprayer 4.07 ..Horizontial sprayer 4.08 ..Impinging jets 4.09 ..Multistaging 4.1 ..Heat recovery 4.2 ..Spinning sprayer 4.3 ..Rotary drum with sprayer 4.4 ..Steam drying or atomizing 5 FILM TYPE 6.1 .Centrifugal 6.2 ..Wiped film 6.3 ...Horizontally 7 .Moving-film support 8 ..Gaseous current 9.1 ...Rotary drum or disk 9.2 ....Treated material inside drum 10 ....Exterior surface 11.1 .Rotary drum or disk 11.2 ..Internal film 11.3 ...Rotary disk 12 ..Inclosing chamber 13.1 .Moving film 13.2 ..Contacting tube 13.3 ...Outside of tube 13.4 ..With gas wiping 14 ..Climbing 15 ..Zigzag 16.1 GASEOUS BLAST OR CURRENT 16.2 .Submerged combustion 16.3 .Steam injection 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 20.2 ..With effect switching means 21 COMBINED CLOSED AND OPEN PANS 22 CLOSED EVAPORATING CHAMBERS 23 .Indirectly heated 24.1 ..Regenerative 24.2 ...Heat recovery or regenerationn 24.3 ....Thermocompression 25.1 ..Rotatable agitator or coil 25.2 ...Vertical axis agitator 26.1 ..Heated tube 26.2 ...Inclined 27.1 ...Vertical 27.2 ....Detached separator 27.3 ....Multieffect in one casing 27.4 ....Downflow 27.5 ....Floating calandria 28.1 ..Heating elements 28.2 ...Baffled 28.3 ...Spur tubes 28.4 ...Coils 28.5 ...Tubular inserts 28.6 ...Plate-type evaporator 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 39 ..Liquid tubes in flue 40 ..Flues in pan 41 ..With dampers 42 STRAINERS OR SKIMMERS 43.1 FLUID FEED OR DISCHARGE DEVICES 43.2 .With alternating operating means 44 .Automatic 45 APPARATUS FOR GRAINING AND SEPARATING CRYSTALS 46 PRELIMINARY HEATERS AND HEAT ECONOMIZERS 47.1 PROCESSES 47.2 .Involving urea 47.3 .Involving waste liquid 48.1 .Spraying 48.2 ..Producing liquid product 49 .Film 1.1 MISCELLANEOUS * ****************************** * CROSS-REFERENCE ART COLLECTIONS * ****************************** 900 USING VIBRATORY FORCE 901 PROMOTING CIRCULATION 902 USING NATURAL HEAT 903 .Solar 904 ..Floating solar still 905 SEWAGE TREATMENT 906 WICK * ****************************** * DIGESTS * ****************************** DIG 1 Electric heat DIG 2 Entrainment DIG 3 Fluidized bedd DIG 4 Foam DIG 5 Freezing DIG 6 Infrared DIG 7 Magnetic coupling DIG 8 Multieffect or multistage DIG 9 Two liquids dried simultaneously DIG 10 Organic DIG 11 Biologicals DIG 12 Radioactive DIG 13 Scale DIG 14 Soap DIG 15 Special material DIG 16 Vacuum DIG 17 Two liquids DIG 18 Accumulator DIG 19 Acid DIG 20 Additive DIG 21 Coating DIG 22 Condensate flashing DIG 23 Cooling DIG 24 Critical DIG 25 Decant, press, centrifuge DIG 26 Electric field DIG 27 Micropores DIG 28 Porous member DIG 29 Pebble bed DIG 30 Desuper heating DIG 31 Deaeration DIG 32 Indirect heat exchange DIG 33 Two liquids, one a heat carrier DIG 34 Caustic DIG 35 Viewports, peepsights, and sightglasses DIG 36 Rabbled hearth DIG 37 Ported DIG 38 Seed DIG 39 Power plant DIG 40 Pumps DIG 41 Removable units DIG 42 Seals