Stephen J. Pietsch
9Patents
5h-index
8Co-inventors
56Inventor score
Filing activity: Oct 1, 1980 → Aug 26, 2015
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4933491A | Method for purifying a crude naphthalene dicarboxylic acid | Chemistry; Metallurgy | 23 | Expired |
| US4298580A | Separation of cobalt and manganese from trimellitic acid process residue by precipitating as carbonates, redissolving as halides and removing cobalt by magnetic means | Emerging Cross-Sectional Technologies | 23 | Expired |
| US4748268A | Continuous process for production of methacrylic acid ester of C.sub.1 to C.sub.4 aliphatic alcohol | Emerging Cross-Sectional Technologies | 9 | Expired |
| US7070694B2 | Purification of fluid compounds utilizing a distillation - membrane separation process | Performing Operations; Transporting | 8 | Expired |
| US4298759A | Separation of cobalt and manganese from trimellitic acid process residue by extraction, ion exchanger and magnet | Emerging Cross-Sectional Technologies | 5 | Expired |
| US4311521A | Membrane separation of catalyst metals from trimellitic acid production and separation of cobalt from manganese | Performing Operations; Transporting | 5 | Expired |
| US4309390A | Separation of cobalt and manganese from trimellitic acid process residue by extraction, pH adjustment, and magnet | Emerging Cross-Sectional Technologies | 2 | Expired |
| US4308240A | Recovery of cobalt and manganese from ash of residue from manufacture of trimellitic acid by acid extraction | Emerging Cross-Sectional Technologies | 2 | Expired |
| US10654790B2 | Recovery process for functionalized compound reaction product | Chemistry; Metallurgy | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.