Werner Hefner
13Patents
9h-index
33Co-inventors
68Inventor score
Filing activity: Feb 29, 1984 → Jul 12, 2002
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4999031A | Removing CO.sub.2 and, if necessary, H.sub.2 S from gases | Emerging Cross-Sectional Technologies | 60 | Expired |
| US4551158A | Removal of CO.sub.2 and/or H.sub.2 S from gases | Emerging Cross-Sectional Technologies | 57 | Expired |
| US4997630A | Removal of CO.sub.2 and/or H.sub.2 S from gases | Emerging Cross-Sectional Technologies | 53 | Expired |
| US5705684A | Preparation of acrolein, acrylic acid or a mixture thereof from propane | Chemistry; Metallurgy | 33 | Expired |
| US6278033A | Catalyst and process for purifying streams of materials | Performing Operations; Transporting | 18 | Expired |
| US6204218A | Catalyst and process for purifying streams of materials | Performing Operations; Transporting | 18 | Expired |
| US5248427A | Removal of water from mixtures with alcohols and/or carboxylic acids and/or carboxylic esters | Chemistry; Metallurgy | 15 | Expired |
| US5684188A | Continuous heterogeneously catalyzed gas-phase oxidation of propylene to acrolein, acrylic acid or a mixture thereof | Chemistry; Metallurgy | 14 | Expired |
| US4859286A | Isolation of 1,3-butadiene | Emerging Cross-Sectional Technologies | 13 | Expired |
| US6090977A | Continuous heterogeneously catalyzed gas-phase partial oxidation of an organic compound | Chemistry; Metallurgy | 8 | Expired |
| US5051188A | Removal of water from a mixture of water, CO.sub.2 and amines | Emerging Cross-Sectional Technologies | 8 | Expired |
| US4569725A | Separation of a C.sub.4 -hydrocarbon mixture essentially containing n-butenes and butanes | Emerging Cross-Sectional Technologies | 4 | Expired |
| US6712942B2 | Working up a mixture comprising alkene and oxygen | Emerging Cross-Sectional Technologies | 1 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.