Johannes E. Schmidt
9Patents
6h-index
23Co-inventors
59Inventor score
Filing activity: Oct 4, 1976 → Apr 9, 1991
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5206433A | Preparation of formic acid | Chemistry; Metallurgy | 21 | Expired |
| US4217460A | Isolation of formic acid from its aqueous solutions | Emerging Cross-Sectional Technologies | 17 | Expired |
| US5225574A | Preparation of phthalic anhydride from o-xylene | Performing Operations; Transporting | 17 | Expired |
| US4218568A | Preparation of formic acid | Chemistry; Metallurgy | 16 | Expired |
| US4568427A | Continuous isolation of phthalic anhydride and maleic anhydride from reaction gases | Chemistry; Metallurgy | 11 | Expired |
| US4076594A | Purification of formic acid by extractive distillation | Chemistry; Metallurgy | 11 | Expired |
| US4961827A | Obtaining very pure maleic anhydride from crude maleic anhydride | Emerging Cross-Sectional Technologies | 6 | Expired |
| US4921977A | Obtaining maleic anhydride not prone to discolor | Chemistry; Metallurgy | 3 | Expired |
| US4369327A | Preparation of phthalic anhydride | Chemistry; Metallurgy | 2 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.