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fixed constructions (3419) 3419
earth drilling (3418) 3418
earth drilling, e.g. deep drilling (3418) 3418
mining (3418) 3418
obtaining oil, gas, water, soluble or meltable materials or aslurry of minerals from wells (3418) 3418
performing operations (1535) 1535
transporting (1535) 1535
separation (1444) 1444
physical or chemical processes or apparatus in general (1419) 1419
chemistry (1074) 1074
metallurgy (1029) 1029
treatment of water, waste water, sewage, or sludge (722) 722
fuels (702) 702
lubricants (695) 695
peat (695) 695
petroleum, gas or coke industries (695) 695
technical gases containing carbon monoxide (695) 695
cracking hydrocarbon oils (605) 605
mineral waxes (605) 605
production of liquid hydrocarbon mixtures, e.g. by destructivehydrogenation, oligomerisation, polymerisation (605) 605
recovery of hydrocarbon oils from oil-shale, oil-sand, orgases (605) 605
refining mixtures mainly consisting of hydrocarbons (605) 605
reforming of naphtha (605) 605
mechanical engineering (311) 311
heating (308) 308
lighting (308) 308
blasting (307) 307
weapons (307) 307
general tagging of cross-sectional technologies spanning over several sections of the ipc (255) 255
general tagging of new technological developments (255) 255
technical subjects covered by former uspc cross-reference art collections [xracs] and digests (255) 255
technologies or applications for mitigation or adaptation againstclimate change (233) 233
animal and vegetable oils, fats, fatty substances and waxes (174) 174
candles (174) 174
detergents (174) 174
fatty acids therefrom (174) 174
physics (150) 150
natural gas (126) 126
adding materials to fuels or fires to reduce smoke orundesirable deposits or to facilitate soot removal (124) 124
firelighters (124) 124
fuels not otherwise provided for (124) 124
liquefied petroleum gas (124) 124
synthetic natural gas obtained by processes not covered bysubclasses c10g, c10k (124) 124
safety devices, transport, filling-up, rescue, ventilation, ordraining in or of mines or tunnels (123) 123
climate change mitigation technologies in the production orprocessing of goods (103) 103
science & technology (103) 103
inorganic chemistry (101) 101
measuring (101) 101
testing (101) 101
carburetting air or other gases (100) 100
production of producer gas, water-gas, synthesis gas fromsolid carbonaceous material, or mixtures containing these gases (100) 100
detergent compositions (97) 97
recovery of glycerol (97) 97
resin soaps (97) 97
soap or soap-making (97) 97
use of single substances as detergents (97) 97
compounds thereof (95) 95
non-metallic elements (94) 94
adhesives (92) 92
dyes (92) 92
miscellaneous applications of materials (92) 92
miscellaneous compositions (92) 92
natural resins (92) 92
paints (92) 92
polishes (92) 92
materials for miscellaneous applications, not provided forelsewhere (87) 87
climate change mitigation technologies related to wastewatertreatment or waste management (81) 81
positive displacement machines for liquids (78) 78
pumps for liquids or elastic fluids (78) 78
essential oils (73) 73
perfumes (71) 71
producing, refining and preservingfats, fatty substances (71) 71
technology (71) 71
magnetic or electrostatic separation of solid materials from solidmaterials or fluids (70) 70
separation by high-voltage electric fields (70) 70
separation of solid materials using liquids or using pneumatictables or jigs (70) 70
destructive distillation of carbonageous materials forproduction of gas, coke, tar, or similar materials (63) 63
physical sciences (63) 63
human necessities (61) 61
chemical or physical processes, e.g. catalysis or colloidchemistry (60) 60
their relevant apparatus (60) 60
engineering elements and units (52) 52
general measures for producing and maintaining effectivefunctioning of machines or installations (52) 52
investigating or analysing materials by determining theirchemical or physical properties (52) 52
organic chemistry (52) 52
reduction of greenhouse gas [ghg] emissions, related to energygeneration, transmission or distribution (52) 52
thermal insulation in general (52) 52
pumps (50) 50
purifying or modifying the chemical composition of combustiblegases containing carbon monoxide (48) 48
disposal of solid waste (46) 46
reclamation of contamined soil soil (46) 46
cleaning (45) 45
cleaning in general (45) 45
combined heating and refrigeration systems (45) 45
heat pump systems (45) 45
liquefaction solidification of gases (45) 45
manufacture or storage of ice (45) 45
prevention of fouling in general (45) 45
refrigeration or cooling (45) 45
engine plants in general (44) 44
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Chinese (3953) 3953
English (3746) 3746
Japanese (202) 202
French (94) 94
Portuguese (6) 6
Korean (3) 3
Russian (1) 1
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