ABB Stal AB
42Patents
0Active
42Granted
35Portfolio score
Filing activity: Feb 18, 1988 → Feb 17, 2000
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5564897A | Axial turbo-machine assembly with multiple guide vane ring sectors and a method of mounting thereof | Emerging Cross-Sectional Technologies | 15 | Expired |
| US4913068A | Method for improving utilization of sulphur-absorbent containing calcium in a power plant and equipment for performing the method | Mechanical Engineering; Lighting; Heating | 15 | Expired |
| US5347936A | Method and a device for preheating a fluidized bed | Mechanical Engineering; Lighting; Heating | 14 | Expired |
| US4896497A | PFBC power plant | Mechanical Engineering; Lighting; Heating | 11 | Expired |
| US5069866A | Method for manufacturing a compound pipe | Performing Operations; Transporting | 9 | Expired |
| US5193337A | Method for operating gas turbine unit for combined production of electricity and heat | Mechanical Engineering; Lighting; Heating | 9 | Expired |
| US4965996A | Power plant for burning a fuel in a fluidized bed | Mechanical Engineering; Lighting; Heating | 8 | Expired |
| US5971018A | Valve device for influencing an overpressurized flow of media | Emerging Cross-Sectional Technologies | 7 | Expired |
| US4796568A | Power plant burning fuel in a fluidized bed | Mechanical Engineering; Lighting; Heating | 7 | Expired |
| US4944150A | PFBC power plant | Mechanical Engineering; Lighting; Heating | 6 | Expired |
| US5176089A | Power plant with combustion of a fuel in a fluidized bed | Mechanical Engineering; Lighting; Heating | 6 | Expired |
| US4854854A | Fluidized bed fuel-fired power plant | Mechanical Engineering; Lighting; Heating | 6 | Expired |
| US4909028A | Pressure relief device | Mechanical Engineering; Lighting; Heating | 6 | Expired |
| US4929287A | Method for surface treatment of metal alloys | Chemistry; Metallurgy | 6 | Expired |
| US5016435A | Method of controlling a PFBC plant in the event of operational disturbance in the gas turbine unit | Mechanical Engineering; Lighting; Heating | 6 | Expired |
| US4872423A | Method for improving utilization of sulphur-absorbent when burning fuel in a fluidized bed and a power plant in which fuel is burned in a fluidized bed | Mechanical Engineering; Lighting; Heating | 5 | Expired |
| US4860535A | Power plant for burning a fuel at high pressure and a gas turbine driven by the combustion gases | Emerging Cross-Sectional Technologies | 5 | Expired |
| US4852345A | Method of cooling bed material from a fluidized bed and a power plant with cooling means for bed material | Mechanical Engineering; Lighting; Heating | 5 | Expired |
| US5146856A | Power plan with a screw conveyor ash cooler | Mechanical Engineering; Lighting; Heating | 5 | Expired |
| US5297622A | Method for cooling of dust separated from the flue gases from a PFBC plant | Mechanical Engineering; Lighting; Heating | 5 | Expired |
| US5244285A | Hydrostatically mounted squeeze film damper | Mechanical Engineering; Lighting; Heating | 4 | Expired |
| US5163384A | Power plant with a combustor for combustion in a fluidized bed | Performing Operations; Transporting | 4 | Expired |
| US5241863A | Buffer volume | Physics | 4 | Expired |
| US4863342A | Gas turbine with link attachment of a sealing ring in a guide vane ring | Mechanical Engineering; Lighting; Heating | 4 | Expired |
| US4838209A | Energy plant with heat exchanger in a blow-off device for hot gases | Mechanical Engineering; Lighting; Heating | 4 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.