Fuel Tech, Inc.
🏢 View company profile →69Patents
29Active
69Granted
46Portfolio score
Filing activity: Oct 4, 1985 → Mar 31, 2022 · 7 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4892562A | Diesel fuel additives and diesel fuels containing soluble platinum group metal compounds and use in diesel engines | Mechanical Engineering; Lighting; Heating | 85 | Expired |
| US4891050A | Gasoline additives and gasoline containing soluble platinum group metal compounds and use in internal combustion engines | Chemistry; Metallurgy | 79 | Expired |
| US4777024A | Multi-stage process for reducing the concentration of pollutants in an effluent | Emerging Cross-Sectional Technologies | 46 | Expired |
| US4842834A | Process for reducing the concentration of pollutants in an effluent | Performing Operations; Transporting | 45 | Expired |
| US5240688A | Process for the in-line hydrolysis of urea | Emerging Cross-Sectional Technologies | 40 | Expired |
| US4751065A | Reduction of nitrogen- and carbon-based pollutants | Performing Operations; Transporting | 40 | Expired |
| US4719092A | Reduction of nitrogen-based pollutants through the use of urea solutions containing oxygenated hydrocarbon solvents | Performing Operations; Transporting | 39 | Expired |
| US4780289A | Process for nitrogen oxides reduction and minimization of the production of other pollutants | Emerging Cross-Sectional Technologies | 38 | Expired |
| US4629472A | Method and apparatus for improving combustion, thermal efficiency and reducing emissions by treating fuel | Chemistry; Metallurgy | 38 | Expired |
| US5057293A | Multi-stage process for reducing the concentration of pollutants in an effluent | Performing Operations; Transporting | 34 | Expired |
| US5894806A | Process for increasing the effectiveness of slag and/or corrosion control chemicals for combustion units | Mechanical Engineering; Lighting; Heating | 33 | Expired |
| US4978514A | Combined catalytic/non-catalytic process for nitrogen oxides reduction | Performing Operations; Transporting | 32 | Expired |
| US4985218A | Process and injector for reducing the concentration of pollutants in an effluent | Performing Operations; Transporting | 29 | Expired |
| US4803059A | Process for the reduction of nitrogen oxides in an effluent using a hydroxy amino hydrocarbon | Performing Operations; Transporting | 27 | Expired |
| US5139754A | Catalytic/non-catalytic combination process for nitrogen oxides reduction | Performing Operations; Transporting | 27 | Expired |
| US5286467A | Highly efficient hybrid process for nitrogen oxides reduction | Performing Operations; Transporting | 26 | Expired |
| US7090810B2 | Selective catalytic reduction of nox enabled by sidestream urea decomposition | Emerging Cross-Sectional Technologies | 25 | Expired |
| US5017347A | Process for nitrogen oxides reduction and minimization of the production of other pollutants | Performing Operations; Transporting | 25 | Expired |
| US4915036A | Boiler and injector for reducing the concentration of pollutants in an effluent | Emerging Cross-Sectional Technologies | 25 | Expired |
| US4752302A | Method and composition for improving flame combustion of liquid carbonaceous fuels | Chemistry; Metallurgy | 24 | Expired |
| US4770863A | Process for the reduction of nitrogen oxides in an effluent | Performing Operations; Transporting | 23 | Expired |
| US4927612A | Reduction of nitrogen- and carbon-based pollutants | Performing Operations; Transporting | 22 | Expired |
| US5047219A | Hybrid process for nitrogen oxides reduction | Emerging Cross-Sectional Technologies | 22 | Expired |
| US4997631A | Process for reducing nitrogen oxides without generating nitrous oxide | Emerging Cross-Sectional Technologies | 20 | Expired |
| US4992249A | Reduction of nitrogen- and carbon-based pollutants through the use of urea solutions | Performing Operations; Transporting | 18 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.