Metallgesellschaft AG
644Patents
0Active
644Granted
44Portfolio score
Filing activity: May 23, 1972 → Jun 7, 2002
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4165717A | Process for burning carbonaceous materials | Mechanical Engineering; Lighting; Heating | 94 | Expired |
| US5264367A | Enzymatic treatment of edible oils | Chemistry; Metallurgy | 78 | Expired |
| US5575982A | Process of purifying exhaust gases produced by combustion of waste materials | Performing Operations; Transporting | 74 | Expired |
| US5348571A | Apparatus for dedusting a gas at high temperature | Emerging Cross-Sectional Technologies | 70 | Expired |
| US4779182A | Power supply for an electrostatic filter | Emerging Cross-Sectional Technologies | 67 | Expired |
| US4025423A | Process for removing monohydric and polyhydric phenols from waste water | Chemistry; Metallurgy | 67 | Expired |
| US4444568A | Method of producing fuel gas and process heat fron carbonaceous materials | Mechanical Engineering; Lighting; Heating | 62 | Expired |
| US4716856A | Integral fluidized bed heat exchanger in an energy producing plant | Mechanical Engineering; Lighting; Heating | 61 | Expired |
| US3966875A | Process for the desulfurization of gases | Chemistry; Metallurgy | 61 | Expired |
| US4111158A | Method of and apparatus for carrying out an exothermic process | Mechanical Engineering; Lighting; Heating | 60 | Expired |
| US6506516B1 | Lithium bisoxalatoborate, the production thereof and its use as a conducting salt | Emerging Cross-Sectional Technologies | 59 | Expired |
| US3972693A | Process for the treatment of phenol-containing waste water from coal degassing or gasification processes | Chemistry; Metallurgy | 58 | Expired |
| US6001640A | Vegetable oil enzymatic degumming process by means of aspergillus phospholipase | Emerging Cross-Sectional Technologies | 57 | Expired |
| US5137546A | Process and apparatus for electrostatic purification of dust- and pollutant-containing exhaust gases in multiple-field precipitators | Performing Operations; Transporting | 56 | Expired |
| US5584970A | Process of producing wood charcoal in a moving bed | Emerging Cross-Sectional Technologies | 54 | Expired |
| US5558781A | Process for enzymatically degumming vegetable oil | Chemistry; Metallurgy | 51 | Expired |
| US4515604A | Process of producing a synthesis gas which has a low inert gas content | Emerging Cross-Sectional Technologies | 51 | Expired |
| US4011066A | Process of purifying gases produced by the gasification of solid or liquid fossil fuels | Chemistry; Metallurgy | 50 | Expired |
| US5702585A | Process of preparing alkali peroxide solutions | Chemistry; Metallurgy | 49 | Expired |
| US6413415B1 | Method for high-temperature short-time distillation of residual oils | Chemistry; Metallurgy | 49 | Expired |
| US4155792A | Process for producing a honeycomb of synthetic-resin material for use in an electrostatic precipitator | Emerging Cross-Sectional Technologies | 48 | Expired |
| US4347064A | Process of gasifying fine-grained solid fuels | Emerging Cross-Sectional Technologies | 47 | Expired |
| US5631302A | Process of producing methanol | Emerging Cross-Sectional Technologies | 46 | Expired |
| US4076796A | Carrying out endothermic processes in fast fluidized reactor with conventionally fluidized holding reactor | Emerging Cross-Sectional Technologies | 46 | Expired |
| US4162902A | Removing phenols from waste water | Emerging Cross-Sectional Technologies | 45 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.