Ulrich Koehler
13Patents
5h-index
27Co-inventors
62Inventor score
Filing activity: Oct 30, 1989 → Jun 21, 2006
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5476969A | Highly reactive polyoxyalkylene-polyols containing tertiary amino groups in bonded form, their preparation, and their use for the preparation of polyisocyanate polyaddition products | Chemistry; Metallurgy | 28 | Expired |
| US5101045A | Preparation of N-substituted pyrrolidones | Chemistry; Metallurgy | 12 | Expired |
| US5101044A | Preparation of N-substituted pyrrolidin-2-ones | Chemistry; Metallurgy | 8 | Expired |
| US5132427A | Process for the preparation of amines | Chemistry; Metallurgy | 7 | Expired |
| US5254738A | Preparation of 1,4-alkylenediamines | Chemistry; Metallurgy | 7 | Expired |
| US5239120A | Preparation of 2-(3-aminopropyl)-cycloalkylamines | Chemistry; Metallurgy | 5 | Expired |
| US5136051A | Preparation of 2-pyrrolidinones | Chemistry; Metallurgy | 4 | Expired |
| US5543515A | Preparation of tertiary amine oxides | Chemistry; Metallurgy | 4 | Expired |
| US5130454A | Polytetrahydrofuran derivatives having terminal aromatic groups | Chemistry; Metallurgy | 3 | Expired |
| US5260484A | Polytetrahydrofuran derivatives having terminal aromatic groups | Chemistry; Metallurgy | 1 | Expired |
| US5359082A | Preparation of 4-substituted imidazoles from N-formyl-.alpha.-aminonitrile | Chemistry; Metallurgy | 1 | Expired |
| US5231231A | Process for preparing a poly(1,4-butanediol-.omega.,.omega.'-bismercaptan) | Chemistry; Metallurgy | 0 | Expired |
| US7767855B2 | Method for the continuous production of an amine | Emerging Cross-Sectional Technologies | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.