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Patent (78955) 78955
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fuels (81738) 81738
chemistry (80413) 80413
peat (79095) 79095
metallurgy (78989) 78989
lubricants (78961) 78961
carburetting air or other gases (78955) 78955
petroleum, gas or coke industries (78955) 78955
production of producer gas, water-gas, synthesis gas fromsolid carbonaceous material, or mixtures containing these gases (78955) 78955
technical gases containing carbon monoxide (78955) 78955
general tagging of cross-sectional technologies spanning over several sections of the ipc (22309) 22309
general tagging of new technological developments (22309) 22309
technical subjects covered by former uspc cross-reference art collections [xracs] and digests (22309) 22309
technologies or applications for mitigation or adaptation againstclimate change (20768) 20768
heating (19700) 19700
mechanical engineering (19606) 19606
lighting (19584) 19584
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blasting (19581) 19581
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climate change mitigation technologies in the production orprocessing of goods (14613) 14613
physical or chemical processes or apparatus in general (13475) 13475
purifying or modifying the chemical composition of combustiblegases containing carbon monoxide (13157) 13157
inorganic chemistry (12719) 12719
compounds thereof (12537) 12537
non-metallic elements (12461) 12461
reduction of greenhouse gas [ghg] emissions, related to energygeneration, transmission or distribution (11193) 11193
combustion apparatus (10961) 10961
combustion processes (10961) 10961
chemical or physical processes, e.g. catalysis or colloidchemistry (9699) 9699
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destructive distillation of carbonageous materials forproduction of gas, coke, tar, or similar materials (8804) 8804
cracking hydrocarbon oils (7498) 7498
mineral waxes (7498) 7498
production of liquid hydrocarbon mixtures, e.g. by destructivehydrogenation, oligomerisation, polymerisation (7498) 7498
recovery of hydrocarbon oils from oil-shale, oil-sand, orgases (7498) 7498
refining mixtures mainly consisting of hydrocarbons (7498) 7498
reforming of naphtha (7498) 7498
natural gas (5720) 5720
consuming waste products by combustion (5585) 5585
cremation furnaces (5585) 5585
liquefied petroleum gas (5509) 5509
adding materials to fuels or fires to reduce smoke orundesirable deposits or to facilitate soot removal (5505) 5505
firelighters (5505) 5505
fuels not otherwise provided for (5505) 5505
synthetic natural gas obtained by processes not covered bysubclasses c10g, c10k (5505) 5505
science & technology (5284) 5284
separation (4639) 4639
carbonaceous materials (4414) 4414
disposal of solid waste (3931) 3931
reclamation of contamined soil soil (3931) 3931
organic chemistry (3728) 3728
physical sciences (3722) 3722
combustion engines (3573) 3573
hot-gas or combustion-product engine plants (3573) 3573
acyclic or carbocyclic compounds (3390) 3390
air intakes for jet-propulsion plants (2778) 2778
controlling fuel supply in air-breathing jet-propulsion plants (2778) 2778
gas-turbine plants (2778) 2778
energy sources (2774) 2774
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engine plants not otherwise provided for (2401) 2401
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coal (2350) 2350
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methodsor apparatus for combustion using fluid fuelor solid fuel suspended in (2301) 2301
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ovens (2176) 2176
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treatment of water, waste water, sewage, or sludge (2099) 2099
electricity (2078) 2078
metallurgy of iron (1925) 1925
flues (1886) 1886
removal or treatment of combustion products or combustionresidues (1885) 1885
technology (1883) 1883
geology (1760) 1760
technical subjects covered by former uspc cross-reference artcollections [xracs] and digests (1688) 1688
exact sciences and technology (1683) 1683
steam generation (1679) 1679
01 coal, lignite, and peat (1677) 1677
manufacture of iron or steel (1651) 1651
physics (1609) 1609
methods of steam generation (1570) 1570
steam boilers (1570) 1570
heat exchange in general (1552) 1552
burners (1437) 1437
applied sciences (1431) 1431
ranges (1353) 1353
ventilating (1353) 1353
basic electric elements (1350) 1350
life sciences & biomedicine (1341) 1341
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English (71842) 71842
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