Michael J. Virnig
71Patents
18h-index
57Co-inventors
87Inventor score
Filing activity: Jan 26, 1976 → Jun 23, 2015
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5575918A | Method for recovery of polymers | Chemistry; Metallurgy | 42 | Expired |
| US5939034A | Process for the recovery of precious metal values from aqueous ammoniacal thiosulfate leach solutions | Emerging Cross-Sectional Technologies | 34 | Expired |
| US6395062B2 | Process for recovery of metals from metal-containing ores | Emerging Cross-Sectional Technologies | 33 | Expired |
| US4814007A | Recovery of precious metals | Emerging Cross-Sectional Technologies | 32 | Expired |
| US4895597A | Recovery of precious metals | Emerging Cross-Sectional Technologies | 31 | Expired |
| US6177055A | Process for extracting and recovering copper | Emerging Cross-Sectional Technologies | 31 | Expired |
| US4992200A | Recovery of precious metals | Emerging Cross-Sectional Technologies | 30 | Expired |
| US6432167B1 | Processes for the recovery of copper from aqueous solutions containing nitrate ions | Emerging Cross-Sectional Technologies | 27 | Expired |
| US5028259A | Recovery of precious metal | Emerging Cross-Sectional Technologies | 25 | Expired |
| US5976218A | Process for the recovery of nickel | Emerging Cross-Sectional Technologies | 25 | Expired |
| US6596053B2 | Processes for the recovery of copper from aqueous solutions containing nitrate ions | Emerging Cross-Sectional Technologies | 25 | Expired |
| US6702872B1 | Processes for the recovery of copper from aqueous solutions containing nitrate ions | Emerging Cross-Sectional Technologies | 24 | Expired |
| US6197214A | Ammonium thiosulfate complex of gold or silver and an amine | Emerging Cross-Sectional Technologies | 22 | Expired |
| US5670035A | Method for recovering copper | Emerging Cross-Sectional Technologies | 22 | Expired |
| US5158603A | Process of extracting anions with quaternary amines | Emerging Cross-Sectional Technologies | 21 | Expired |
| US6107523A | Beta-diketones for the extraction of copper from aqueous ammoniacal solutions | Chemistry; Metallurgy | 20 | Expired |
| US5908605A | Copper recovery process | Emerging Cross-Sectional Technologies | 20 | Expired |
| US6599414B1 | Solvent extraction processes for metal recovery | Emerging Cross-Sectional Technologies | 19 | Expired |
| US5340380A | Recovery of precious metal | Emerging Cross-Sectional Technologies | 17 | Expired |
| US4940808A | Process for ozonization of unsaturated organic compounds | Chemistry; Metallurgy | 17 | Expired |
| US5785935A | Process for removing mercury from soil | Emerging Cross-Sectional Technologies | 16 | Expired |
| US5494649A | Process for removing heavy metals from paint chips | Emerging Cross-Sectional Technologies | 15 | Expired |
| US6231784A | Water insoluble composition of an aldoxime extractant and an equilibrium modifier | Emerging Cross-Sectional Technologies | 12 | Expired |
| US4626582A | Acryloxymethyl substituted fatty compounds | Chemistry; Metallurgy | 12 | Expired |
| US6261526A | Nickel recovery process and compositions for use therein | Emerging Cross-Sectional Technologies | 11 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.