Stefan Maixner
19Patents
2h-index
52Co-inventors
57Inventor score
Filing activity: Apr 30, 2001 → Nov 3, 2022
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US7342134B2 | Method for the distillative recovery of toluylenediamine | Chemistry; Metallurgy | 4 | Expired |
| US8829232B2 | Process for preparing aromatic isocyanates | Chemistry; Metallurgy | 3 | Active |
| US6878798B2 | Method for producing a polymer, using caprolactam | Emerging Cross-Sectional Technologies | 2 | Expired |
| US6686465B2 | Preparation of cyclic lactams | Chemistry; Metallurgy | 2 | Expired |
| US7501047B2 | Method for purifying caprolactam | Chemistry; Metallurgy | 2 | Expired |
| US7217818B2 | Purification of caprolactam | Chemistry; Metallurgy | 2 | Expired |
| US10093615B2 | Process for preparing isocyanates in dialkyl carbonates as solvent | Chemistry; Metallurgy | 1 | Active |
| US6828457B2 | Method for reducing the content of an unsaturated amine in a mixture containing an amine and a nitrile | Chemistry; Metallurgy | 1 | Expired |
| US11512046B2 | Heterogeneous catalysts for the direct carbonylation of nitro aromatic compounds to isocyanates | Chemistry; Metallurgy | 1 | Active |
| US6683178B2 | Preparation of cyclic lactams | Chemistry; Metallurgy | 0 | Expired |
| US12415780B2 | Heterogeneous catalysts for the direct carbonylation of nitro aromatic compounds to isocyanates | Chemistry; Metallurgy | 0 | Active |
| US7115781B2 | Iron-containing oxidic material suitable for use as hydrogenation catalyst precursor | Performing Operations; Transporting | 0 | Expired |
| US6896772B2 | Method for separating ammonia from solutions containing caprolactam and ammonia | Chemistry; Metallurgy | 0 | Expired |
| US8614356B2 | Method for producing toluylenediamine by hydrogenating dinitrotoluene | Chemistry; Metallurgy | 0 | Active |
| US10435354B2 | Process for preparing isocyanates in dialkyl carbonates as solvent | Chemistry; Metallurgy | 0 | Active |
| US8772535B2 | Process for preparing isocyanates | Chemistry; Metallurgy | 0 | Active |
| US7385073B2 | Method for reducing the content of an unsaturated amine in a mixture containing an amino nitrile, a diamine, a dinitrile or mixtures thereof | Chemistry; Metallurgy | 0 | Expired |
| US7875740B2 | Iron-containing material suitable for use as hydrogenation catalyst | Chemistry; Metallurgy | 0 | Expired |
| US8212069B2 | Process for preparing isocyanates | Chemistry; Metallurgy | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.