| 1/00 | Removing ash, clinker, or slag from combustion chambers (devices for removal of material from the bed of fluidised bed combustion apparatus F23C 10/24) |
| 1/02 | Removing ash, clinker, or slag from combustion chambers (devices for removal of material from the bed of fluidised bed combustion apparatus F23C 10/24) Apparatus for removing ash, clinker, or slag from ash-pits, e.g. by employing trucks or conveyers, by employing suction devices |
| 1/04 | Removing ash, clinker, or slag from combustion chambers (devices for removal of material from the bed of fluidised bed combustion apparatus F23C 10/24) Hand tools, e.g. rakes, prickers, tongs |
| 1/06 | Removing ash, clinker, or slag from combustion chambers (devices for removal of material from the bed of fluidised bed combustion apparatus F23C 10/24) Mechanically-operated devices, e.g. clinker pushers (forming part of the grate F23H) |
| 1/08 | Removing ash, clinker, or slag from combustion chambers (devices for removal of material from the bed of fluidised bed combustion apparatus F23C 10/24) Liquid slag removal |
| 3/00 | Removing solid residues from passages or chambers beyond the fire, e.g. from flues by soot blowers |
| 3/02 | Removing solid residues from passages or chambers beyond the fire, e.g. from flues by soot blowers Cleaning furnace tubes; Cleaning flues or chimneys (by means which do not differ materially from the cleaning of any other tube once the fire is out B08B) |
| 3/04 | Removing solid residues from passages or chambers beyond the fire, e.g. from flues by soot blowers Traps |
| 3/06 | Removing solid residues from passages or chambers beyond the fire, e.g. from flues by soot blowers Systems for accumulating residues from different parts of furnace plant |
| 7/00 | Arrangement of devices for supplying chemicals to fire (supplying chemicals to fire C10L) |
| 9/00 | Preventing premature solidification of molten combustion residues |
| 11/00 | Devices for conducting smoke or fumes, e.g. flues (heat insulation therefor E04B 1/94; chimneys E04H 12/28; removing cooking fumes from domestic stoves or ranges F24C 15/2) |
| 11/02 | Devices for conducting smoke or fumes, e.g. flues (heat insulation therefor E04B 1/94; chimneys E04H 12/28; removing cooking fumes from domestic stoves or ranges F24C 15/2) for conducting smoke or fumes originating from various locations to the outside, e.g. in locomotive sheds, in garages |
| 11/04 | Devices for conducting smoke or fumes, e.g. flues (heat insulation therefor E04B 1/94; chimneys E04H 12/28; removing cooking fumes from domestic stoves or ranges F24C 15/2) in locomotives; in road vehicles; in ships |
| 11/06 | Devices for conducting smoke or fumes, e.g. flues (heat insulation therefor E04B 1/94; chimneys E04H 12/28; removing cooking fumes from domestic stoves or ranges F24C 15/2) in locomotives; in road vehicles; in ships for conducting smoke horizontally |
| 11/08 | Devices for conducting smoke or fumes, e.g. flues (heat insulation therefor E04B 1/94; chimneys E04H 12/28; removing cooking fumes from domestic stoves or ranges F24C 15/2) for portable apparatus |
| 11/10 | Devices for conducting smoke or fumes, e.g. flues (heat insulation therefor E04B 1/94; chimneys E04H 12/28; removing cooking fumes from domestic stoves or ranges F24C 15/2) for tents; for log huts; for other inflammable structures |
| 11/12 | Devices for conducting smoke or fumes, e.g. flues (heat insulation therefor E04B 1/94; chimneys E04H 12/28; removing cooking fumes from domestic stoves or ranges F24C 15/2) Smoke conduit systems for factories or large buildings |
| 13/00 | Fittings for chimneys or flues (staying, stiffening E04H; means for facilitating climbing E06C; draught-inducing apparatus associated with chimneys or flues F23L) |
| 13/02 | Fittings for chimneys or flues (staying, stiffening E04H; means for facilitating climbing E06C; draught-inducing apparatus associated with chimneys or flues F23L) Linings; Jackets; Casings |