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A
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SECTION A — HUMAN NECESSITIES
B
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SECTION B — PERFORMING OPERATIONSTRANSPORTING
C
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SECTION C — CHEMISTRYMETALLURGY
D
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SECTION D — TEXTILESPAPER
E
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SECTION E — FIXED CONSTRUCTIONS
F
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SECTION F — MECHANICAL ENGINEERINGLIGHTINGHEATINGWEAPONSBLASTING
F01
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ENGINES OR PUMPS
F01
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MACHINES OR ENGINES IN GENERAL (combustion engines F02; machines for liquids F03, F04)ENGINE PLANTS IN GENERALSTEAM ENGINES
F02
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COMBUSTION ENGINES (cyclically operating valves therefor, lubricating, exhausting, or silencing engines F01)HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
F03
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MACHINES OR ENGINES FOR LIQUIDS (for liquids and elastic fluids F01; positive-displacement machines for liquids F04)WIND, SPRING, OR WEIGHT MOTORSPRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
F04
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POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDSPUMPS FOR LIQUIDS OR ELASTIC FLUIDS (portable fire extinguishers with manually-operated pumps A62C 11/00, with power-driven pumps A62C 25/00; charging or scavenging combustion engines by pumps F02B; engine fuel-injection pumps F02M; ion pumps H01J 41/12; electrodynamic pumps H02K 44/02)
F15
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ENGINEERING IN GENERAL
F15
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FLUID-PRESSURE ACTUATORSHYDRAULICS OR PNEUMATICS IN GENERAL
F16
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ENGINEERING ELEMENTS OR UNITSGENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONSTHERMAL INSULATION IN GENERAL
F17
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STORING OR DISTRIBUTING GASES OR LIQUIDS (water supply E03B)
F21
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LIGHTINGHEATING
F21
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LIGHTING (electric aspects or elements, see section H, e.g. electric light sources H01J, H01K, H05B)
F22
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STEAM GENERATION (chemical or physical apparatus for generating gases B01J; chemical generation of gas, e.g. under pressure, Section C; removal of combustion products or residues, e.g. cleaning of the combustion contaminated surfaces of tubes of boilers, F23J; generating combustion products of high pressure or high velocity F23R; water heaters not for steam generation F24H, F28; cleaning of internal or external surfaces of heat-transfer conduits, e.g. water tubes of boilers, F28G)
F23
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COMBUSTION APPARATUSCOMBUSTION PROCESSES
F24
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HEATINGRANGESVENTILATING (protecting plants by heating in gardens, orchards, or forests A01G 13/06; baking ovens and apparatus A21B; cooking devices other than ranges A47J; forging B21J, B21K; specially adapted for vehicles, see the relevant subclasses of classes B60-B64; combustion apparatus in general F23; drying F26B; ovens in general F27; electric heating elements or arrangements H05B)
F25
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REFRIGERATION OR COOLINGCOMBINED HEATING AND REFRIGERATION SYSTEMSHEAT PUMP SYSTEMSMANUFACTURE OR STORAGE OF ICELIQUEFACTION OR SOLIDIFICATION OF GASES
F26
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DRYING
F26B
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DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM (drying devices for combines A01D 41/133; racks for drying fruit or vegetables A01F 25/12; drying foodstuffs A23; drying hair A45D 20/00; body-drying implements A47K 10/00; drying household articles A47L; drying gases or vapours B01D; chemical or physical processes for dewatering or like separating liquids from solids B01D 43/00; centrifugal apparatus B04; drying ceramics C04B 33/30; drying yarns or fabrics in association with some other form of treatment D06C; drying frames for laundry without heating or positive air circulation, domestic laundry-or spin-driers, wringing or hot pressing laundry D06F; furnaces, kilns, ovens F27)
F26B 1/00
Processes for drying
F26B 1/00
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Preliminary treatment of solid materials or objects to facilitate drying
F26B 3/00
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Drying solid materials or objects by processes involving the application of heat (in specific machines or apparatus F26B 9/00-F26B 19/00)
F26B 3/02
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by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air
F26B 3/04
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. . the gas or vapour circulating over, or surrounding, the materials or objects to be dried (F26B 3/14 takes precedence)
F26B 3/06
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. . the gas or vapour flowing through the materials or objects to be dried (F26B 3/14 takes precedence)
F26B 3/08
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. . . so as to loosen them, e.g. to form a fluidised bed
F26B 3/084
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. . . . with heat exchange taking place in the fluidised bed [5]
F26B 3/088
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. . . . using inert thermally-stabilised particles [5]
F26B 3/092
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. . . . agitating the fluidised bed, e.g. by vibrating or pulsating [5]
F26B 3/097
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. . . . using a magnetic field to stabilise the fluidised bed [5]
F26B 3/10
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. . the gas or vapour carrying the materials or objects to be dried with it
F26B 3/12
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. . . in the form of a spray
F26B 3/14
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. . the materials or objects to be dried being moved by gravity
F26B 3/16
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. . . in a counter-flow of the gas or vapour
F26B 3/18
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by conduction, i.e. the heat is conveyed from the heat source, e.g. gas flame, to the materials or objects to be dried by direct contact
F26B 3/20
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. . the heat source being a heated surface (F26B 3/22 takes precedence)
F26B 3/22
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. . the heat source and the materials or objects to be dried being in relative motion, e.g. of vibration
F26B 3/24
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. . . the movement being rotation
F26B 3/26
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. . . the movement being performed by gravity
F26B 3/28
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by radiation, e.g. from the sun
F26B 3/30
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. . from infra-red-emitting elements
F26B 3/32
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by development of heat within the materials or objects to be dried
F26B 3/34
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. . by using electrical effects
F26B 3/347
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. . . Electromagnetic heating, e.g. induction heating or heating using microwave energy [4]
F26B 3/353
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. . . Resistance heating [4]
F26B 3/36
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. . by using mechanical effects, e.g. by friction (by using ultrasonic vibration F26B 5/02)
F26B 5/00
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Drying solid materials or objects by processes not involving the application of heat (separating liquids from solids by straining B01D; replacing liquids in wet solids by other liquids, e.g. water by spirit, B01D 12/00; drying by electrophoresis B01J)
F26B 7/00
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Drying solid materials or objects by processes using a combination of processes not covered by a single one of groups F26B 3/00 or F26B 5/00
F26B 9/00
Machines or apparatus for drying
F26B 9/00
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Machines or apparatus for drying solid materials or objects at rest or with only local agitationDomestic airing cupboards
F26B 11/00
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Machines or apparatus for drying solid materials or objects with movement which is non-progressive
F26B 13/00
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Machines or apparatus for drying fabrics, fibres, yarns, or other materials in long lengths, with progressive movement
F26B 15/00
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Machines or apparatus for drying objects with progressive movementMachines or apparatus with progressive movement for drying batches of material in compact form (F26B 13/00, F26B 17/00 take precedence; conveyers in general B65G)
F26B 17/00
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Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement (F26B 13/00 takes precedence)
F26B 19/00
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Machines or apparatus for drying solid materials or objects not covered by groups F26B 9/00-F26B 17/00
F26B 20/00
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Combinations of machines or apparatus covered by two or more of groups F26B 9/00-F26B 19/00
F26B 21/00
Details of general application
F26B 21/00
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Arrangements for supplying or controlling air or gases for drying solid materials or objects (air-conditioning or ventilation in general F24F)
F26B 23/00
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Heating arrangements (using heated air or gases F26B 21/00)
F26B 25/00
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Details of general application not covered by group F26B 21/00 or F26B 23/00 (loading, conveying, or unloading in general B65G)
F27
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FURNACESKILNSOVENSRETORTS (specially adapted for a purpose covered by a single other class and specifically mentioned in that class, see the class in question, e.g. bakery ovens A21B, glass melting furnaces C03B, coke or gas-making apparatus C10B, C10J, apparatus for cracking hydrocarbons C10G, blast furnaces C21B, converters for making steel C21C, furnaces for heat treatment of metal C21D; furnaces for electroslag or arc remelting of metals C22B 9/00; enamelling ovens C23D; combustion apparatus F23; electric heating H05B) [4]
F28
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HEAT EXCHANGE IN GENERAL (heat-transfer, heat-exchange or heat-storage materials C09K 5/00; arrangement or mounting of heat-exchangers in air-conditioning, air-humidification or ventilation F24F 13/30)
F41
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WEAPONSBLASTING
F41
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WEAPONS
F42
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AMMUNITIONBLASTING
F99
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SUBJECT MATTER NOT OTHERWISE PROVIDED FOR IN THIS SECTION [2006.01]
G
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SECTION G — PHYSICS
H
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SECTION H — ELECTRICITY

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