UHDE GMBH
186Patents
65Active
186Granted
47Portfolio score
Filing activity: Apr 4, 1977 → Apr 12, 2013 · 54 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US7682597B2 | Method for extracting hydrogen from a gas that contains methane, especially natural gas, and system for carrying out said method | Emerging Cross-Sectional Technologies | 76 | Active |
| US9039869B2 | Controllable air ducts for feeding of additional combustion air into the area of flue gas channels of coke oven chambers | Chemistry; Metallurgy | 72 | Active |
| US8647476B2 | Device for feeding combustion air or gas influencing coal carbonization into the upper area of coke ovens | Emerging Cross-Sectional Technologies | 66 | Active |
| US8980063B2 | Air proportioning system for secondary air in coke ovens depending on the vault vs. sole temperature ratio | Chemistry; Metallurgy | 65 | Active |
| US6841708B1 | Method of producing ethylene (di)chloride (EDC) | Performing Operations; Transporting | 49 | Expired |
| US7671244B2 | Method for producing 1,2-dichloroethane by means of direct chlorination | Chemistry; Metallurgy | 45 | Expired |
| US7579509B2 | Method and device for producing 1,2-dichlorethane by means of direct chlorination | Performing Operations; Transporting | 45 | Expired |
| US8568568B2 | Leveling apparatus for and method of filling an oven chamber of a coke-oven battery | Chemistry; Metallurgy | 41 | Active |
| US8257452B2 | Method for producing hydrogen and power from a synthesis gas | Emerging Cross-Sectional Technologies | 38 | Active |
| US4287839A | Apparatus for lining the inner walls of industrial furnaces | Mechanical Engineering; Lighting; Heating | 38 | Expired |
| US4565297A | High-pressure vessel with inner closure | Emerging Cross-Sectional Technologies | 34 | Expired |
| US4456440A | Valve assembly for high-pressure pumps | Mechanical Engineering; Lighting; Heating | 31 | Expired |
| US4741885A | Vessel for the generation of synthesis gas | Chemistry; Metallurgy | 26 | Expired |
| US4537571A | Process of and apparatus for reheating and conveying a granular heat carrier | Performing Operations; Transporting | 25 | Expired |
| US4263143A | Process and apparatus for dispersing gas in a liquid | Emerging Cross-Sectional Technologies | 25 | Expired |
| US4592806A | Process for the production of grade AA methanol | Emerging Cross-Sectional Technologies | 24 | Expired |
| US4392937A | Electrolysis cell | Chemistry; Metallurgy | 20 | Expired |
| US5622678A | High pressure generating apparatus | Human Necessities | 19 | Expired |
| US4742623A | Process and equipment for the indirect drying of sludge, especially for the drying of wastewater sludge | Chemistry; Metallurgy | 18 | Expired |
| US4346113A | Process for the continuous fermentation of aqueous slurries for the production of alcohol and yeast biomass | Emerging Cross-Sectional Technologies | 17 | Expired |
| US7604684B2 | Method for selective removal of hydrogen sulphide and CO2 from crude gas | Emerging Cross-Sectional Technologies | 17 | Expired |
| US4483458A | Closure system for pressure vessels | Performing Operations; Transporting | 15 | Expired |
| US6878836B2 | Process for the epoxidation of propene | Emerging Cross-Sectional Technologies | 15 | Expired |
| US7049450B2 | Process for the purification of crude propene oxide | Chemistry; Metallurgy | 14 | Expired |
| US7157610B2 | Process for recovering methanol | Emerging Cross-Sectional Technologies | 13 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.