IPC Classification

Class code (prefix) Descriptions Number of results
F27D 1/00 CasingsLiningsWallsRoofs
F27D 1/02 CrownsRoofs
F27D 1/04 CasingsLiningsWallsRoofs characterised by the form of the bricks or blocks used
F27D 1/06 Composite bricks or blocks
F27D 1/08 Bricks or blocks with internal reinforcement or metal backing
F27D 1/10 Monolithic liningsSupports therefor
F27D 1/12 CasingsLiningsWallsRoofs incorporating cooling arrangements
F27D 1/14 Supports for linings
F27D 1/16 Making or repairing linings
F27D 1/18 Door framesDoors, lids or removable covers
F27D 3/00 ChargingDischargingManipulation of charge
F27D 3/02 Skids or tracks for heavy objects
F27D 3/04 Ram or pusher apparatus
F27D 3/06 Charging or discharging machines on travelling carriages
F27D 3/08 Screw feedersScrew dischargers
F27D 3/10 Charging directly from hoppers or shoots
F27D 3/12 Travelling or movable supports or containers for the charge
F27D 3/14 Charging or discharging liquid or molten material
F27D 3/15 Tapping equipmentEquipment for removing slag
F27D 3/16 Introducing a fluid jet or current into the charge
F27D 3/18 Charging particulate material using a fluid carrier
F27D 5/00 Supports, screens or the like for the charge within the furnace
F27D 7/00 Forming, maintaining or circulating atmospheres in heating chambers
F27D 7/02 Supplying steam, vapour, gases or liquids
F27D 7/04 Circulating atmospheres by mechanical means
F27D 7/06 Forming or maintaining special atmospheres or vacuum within heating chambers
F27D 9/00 Cooling of furnaces or of charges therein
F27D 11/00 Arrangement of elements for electric heating in or on furnaces
F27D 11/02 Ohmic resistance heating
F27D 11/04 Ohmic resistance heating with direct passage of current through the material being heated
F27D 11/06 Induction heating, i.e. in which the material being heated, or its container or elements embodied therein, form the secondary of a transformer
F27D 11/08 Heating by electric discharge, e.g. arc discharge
F27D 11/10 Disposition of electrodes
F27D 11/12 Arrangement of elements for electric heating in or on furnaces with electromagnetic fields acting directly on the material being heated
F27D 13/00 Apparatus for preheating chargesArrangements for preheating charges
F27D 15/00 Handling or treating discharged materialSupports or receiving chambers therefor
F27D 15/02 Cooling
F27D 17/00 Arrangements for using waste heatArrangements for using, or disposing of, waste gases
F27D 17/10 Arrangements for using waste heat
F27D 17/12 Arrangements for using waste heat using heat storage
F27D 17/13 Arrangements for using waste heat using heat storage using regenerative heat exchangers
F27D 17/15 Arrangements for using waste heat using boilers
F27D 17/17 Arrangements for using waste heat for preheating fluids, e.g. air or gases
F27D 17/18 Arrangements for using waste heat for preheating solid materials
F27D 17/20 Arrangements for treatment or cleaning of waste gases
F27D 17/22 Arrangements for treatment or cleaning of waste gases for removing solid constituents
F27D 17/25 Arrangements for treatment or cleaning of waste gases for removing solid constituents using cyclones
F27D 17/28 Arrangements for treatment or cleaning of waste gases for cooling waste gases
F27D 17/30 Arrangements for extraction or collection of waste gasesHoods therefor
F27D 19/00 Arrangement of controlling devices
F27D 21/00 Arrangement of monitoring devicesArrangement of safety devices
F27D 21/02 Observation or illuminating devices
F27D 21/04 Arrangement of indicators or alarms
F27D 25/00 Devices for removing incrustations
F27D 27/00 Stirring devices for molten material
F27D 99/00 Subject matter not provided for in other groups of this subclass