Joachim Pfeffinger
18Patents
6h-index
64Co-inventors
69Inventor score
Filing activity: Jul 3, 1996 → Feb 11, 2019
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6592832B1 | Method for producing highly pure lithium salts | Chemistry; Metallurgy | 37 | Expired |
| US6576788B1 | METHOD FOR PRODUCING MIXTURES CONSISTING OF DIPHENYLMETHANE DIISOCYANATES AND POLYPHENYLENE-POLYMETHYLENE-POLYISOCYANATES CONTAINING A REDUCED AMOUNT OF CHLORINATED SECONDARY PRODUCTS AND WITH A REDUCED IODINE COLOR INDEX | Chemistry; Metallurgy | 33 | Expired |
| US5785819A | Distillation column for separating a liquid mixture into a plurality of pure fractions | Emerging Cross-Sectional Technologies | 16 | Expired |
| US6403845B1 | Preparation of pentanediols from alkoxydihydropyrans | Chemistry; Metallurgy | 14 | Expired |
| US7084297B2 | Production of isocyanates in the gaseous phase | Chemistry; Metallurgy | 11 | Expired |
| US6790995B2 | Preparation of primary and secondary amines from nitriles | Chemistry; Metallurgy | 8 | Expired |
| US5788743A | Selective separation and recovery of chlorine from gas mixtures | Emerging Cross-Sectional Technologies | 3 | Expired |
| US6723880B2 | Preparation of secondary amines from primary amines | Chemistry; Metallurgy | 2 | Expired |
| US6750365B2 | Thermal dissociation of allophanates | Chemistry; Metallurgy | 1 | Expired |
| US8828267B2 | Use of a stereoisomer mixture of diaminomethylcyclohexane as a hardener for epoxy resins | Chemistry; Metallurgy | 0 | Active |
| US11518749B2 | Method for the continuous separation by distillation of mixtures that contain morpholine (MO), monoaminodiglycol (ADG), ammonia, water and methoxyethanol (MOE) | Chemistry; Metallurgy | 0 | Active |
| US11214555B2 | Method for depleting 2-methoxyethanol (MOE) | Chemistry; Metallurgy | 0 | Active |
| US6525223B2 | Preparation of secondary amines from nitriles | Chemistry; Metallurgy | 0 | Expired |
| US8940250B2 | Method of conveying liquids | Emerging Cross-Sectional Technologies | 0 | Active |
| US8987517B2 | Process for preparing cycloaliphatic amines | Emerging Cross-Sectional Technologies | 0 | Active |
| US8822718B2 | Process for preparing isocyanates by thermally cleaving carbamates | Chemistry; Metallurgy | 0 | Active |
| US11591543B2 | Aroma chemical compositions containing 3,5-diethyl-2-propyl-tetrahydropyran and/or unsaturated derivatives thereof | Chemistry; Metallurgy | 0 | Active |
| US7994361B2 | Moderate-pressure gas phase phosgenation | Chemistry; Metallurgy | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.