Degussa AG
1,766Patents
48Active
1,766Granted
47Portfolio score
Filing activity: Jul 26, 1976 → Aug 24, 2009 · 48 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5658873A | Coated sodium percarbonate particles, a process for their production and detergent, cleaning and bleaching compositions containing them | Chemistry; Metallurgy | 243 | Expired |
| US6486366B1 | Method for producing alcohols by hydrogenation of carbonyl compounds | Chemistry; Metallurgy | 147 | Expired |
| US5159009A | Carbon blacks modified with organosilicon compounds, method of their production and their use in rubber mixtures | Chemistry; Metallurgy | 134 | Expired |
| US5157007A | Catalyst for purification of exhaust gases of diesel engines and method of use | Emerging Cross-Sectional Technologies | 112 | Expired |
| US4435216A | Process for the accelerated solidification of hydraulic cement mixture | Chemistry; Metallurgy | 107 | Expired |
| US6766091B2 | Polymeric optical conductors | Physics | 91 | Expired |
| US6294140A | Layered noble metal-containing exhaust gas catalyst and its preparation | Emerging Cross-Sectional Technologies | 87 | Expired |
| US6849754B2 | Organosilicon compounds | Chemistry; Metallurgy | 84 | Expired |
| US5460643A | Method of regenerating mercury adsorption means | Performing Operations; Transporting | 83 | Expired |
| US5116886A | Method for the production of fillers modified with organosilicon compounds, the fillers produced in this manner and their use | Chemistry; Metallurgy | 81 | Expired |
| US4515758A | Process and catalyst for the reduction of the ignition temperature of diesel soot filtered out of the exhaust gas of diesel engines | Emerging Cross-Sectional Technologies | 81 | Expired |
| US5779480A | Prosthetic abutment for dental implants | Human Necessities | 76 | Expired |
| US4963332A | Method for the catalytic removal of nitrogen oxides from exhaust gases by means of a reducing agent | Emerging Cross-Sectional Technologies | 74 | Expired |
| US5534149A | Method of separating catalyst-free working solution from the hydrogenation cycle of the anthraquinone method for the production of hydrogen peroxide | Emerging Cross-Sectional Technologies | 74 | Expired |
| US5817870A | Process for the production of malonic acid or a salt thereof | Chemistry; Metallurgy | 72 | Expired |
| US6348430B1 | Exhaust gas treatment catalyst for internal combustion engines with two catalytically active layers on a carrier structure | Emerging Cross-Sectional Technologies | 71 | Expired |
| US4541986A | Process for deodorizing sludge | Emerging Cross-Sectional Technologies | 70 | Expired |
| US6007934A | Co-tolerant anode catalyst for PEM fuel cells and a process for its preparation | Emerging Cross-Sectional Technologies | 68 | Expired |
| US6720462B2 | Method for producing aromatic alcohols, especially phenol | Emerging Cross-Sectional Technologies | 68 | Expired |
| US5334778A | Process for the production of 1,3-propanediol | Chemistry; Metallurgy | 66 | Expired |
| US6022404A | Surface-modified, pyrogenically produced mixed oxides, method of their production and use | Chemistry; Metallurgy | 64 | Expired |
| US5776240A | Granules based on pyrogenically prepared silicon dioxide, methods for their preparation and use thereof | Chemistry; Metallurgy | 64 | Expired |
| US6361871B1 | Composition of organofluorine-functional silanes and/or siloxanes, process for preparing it and its use | Emerging Cross-Sectional Technologies | 64 | Expired |
| US4297145A | Silane/filler preparations, process for their production and their use | Chemistry; Metallurgy | 64 | Expired |
| US5387720A | Process for the production of acrolein | Chemistry; Metallurgy | 63 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.