FLSmidth A/S
🏢 View company profile →258Patents
170Active
258Granted
54Portfolio score
Filing activity: Dec 10, 1982 → Jan 25, 2022 · 62 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4936876A | Method and apparatus for detecting back corona in an electrostatic filter with ordinary or intermittent DC-voltage supply | Performing Operations; Transporting | 93 | Expired |
| US4644439A | Fast-acting spark-over detector | Emerging Cross-Sectional Technologies | 51 | Expired |
| US4626261A | Method of controlling intermittent voltage supply to an electrostatic precipitator | Emerging Cross-Sectional Technologies | 50 | Expired |
| US4984983A | Method of cofiring hazardous waste in industrial rotary kilns | Emerging Cross-Sectional Technologies | 25 | Expired |
| US4689141A | Separator for sorting particulate material, with a plurality of separately adjustable guide vane sets | Performing Operations; Transporting | 24 | Expired |
| US7255123B2 | Device for dividing a stream of particulate or pulverulent material into substreams | Emerging Cross-Sectional Technologies | 17 | Expired |
| US5417760A | Method for manufacturing of normal as well as ultra-fine cement | Chemistry; Metallurgy | 16 | Expired |
| US4489895A | Vertical roller mills | Performing Operations; Transporting | 16 | Expired |
| US5349910A | Method and apparatus for incinerating waste in a cement kiln plant | Emerging Cross-Sectional Technologies | 15 | Expired |
| US4555390A | Method for removing sulfur oxides from hot flue gases | Performing Operations; Transporting | 15 | Expired |
| US6902714B2 | Method for reducing the SO2 emission from a plant for manufacturing cement clinker and such plant | Performing Operations; Transporting | 15 | Expired |
| US7841477B2 | Cyclone separator | Mechanical Engineering; Lighting; Heating | 15 | Active |
| US4869434A | Vertical roller mill | Performing Operations; Transporting | 14 | Expired |
| US4555388A | Method and apparatus for calcining raw phosphate material | Emerging Cross-Sectional Technologies | 14 | Expired |
| US5299512A | Burner for a rotary kiln | Emerging Cross-Sectional Technologies | 13 | Expired |
| US5614016A | Method and plant for manufacturing cement clinker | Emerging Cross-Sectional Technologies | 12 | Expired |
| US5624039A | Separator for sorting of particular material | Performing Operations; Transporting | 12 | Expired |
| US4848993A | Cyclone | Performing Operations; Transporting | 12 | Expired |
| US5711802A | Heat treatment of lime sludge | Mechanical Engineering; Lighting; Heating | 12 | Expired |
| US5975891A | Method for reducing NO.sub.x emission from a kiln plant | Mechanical Engineering; Lighting; Heating | 11 | Expired |
| US4582260A | Method of and plant for grinding pulverulent or granular materials | Performing Operations; Transporting | 11 | Expired |
| US4715544A | Vertical roller mill | Performing Operations; Transporting | 11 | Expired |
| US4626343A | Separator for sorting particulate material | Performing Operations; Transporting | 11 | Expired |
| US7988865B2 | Feedwell dilution system for thickeners in oil sands | Performing Operations; Transporting | 10 | Active |
| US4697686A | Gate for splitting a flow of granular material | Performing Operations; Transporting | 10 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.