Issued Patents All Time
Showing 1–25 of 26 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4832925 | Recovery of zinc from zinc-containing sulphidic material | Ian M. Masters, Barry N. Doyle | 1989-05-23 |
| 4657944 | CO.sub.2 -induced in-situ gelation of polymeric viscosifiers for permeability contrast correction | Donald D. Bruning | 1987-04-14 |
| 4645532 | Production of fine spherical copper powder | Vladimir N. Mackiw, Alexander Nadezhdin | 1987-02-24 |
| 4632701 | Process for the recovery of silver from a residue essentially free of elemental sulphur | Roman M. Genik-Sas-Berezowsky | 1986-12-30 |
| 4610724 | Recovery of gold from refractory auriferous iron-containing sulphidic material | Roman M. Genik-Sas-Berezowsky | 1986-09-09 |
| 4606763 | Process for the pressure oxidation acid leaching of non-ferrous metal and iron-containing sulphidic material | — | 1986-08-19 |
| 4606766 | Process for separately recovering gold and silver from solution by carbon adsorption | Roman M. Genik-Sas-Berezowsky | 1986-08-19 |
| 4605439 | Recovery of gold from refractory auriferous iron-containing sulphidic material | — | 1986-08-12 |
| 4594102 | Recovery of cobalt and nickel from sulphidic material | Derek E. Kerfoot, Michael E. Chalkley | 1986-06-10 |
| 4571264 | Recovery of gold from refractory auriferous iron-containing sulphidic ore | Roman M. Genik-Sas-Berezowsky | 1986-02-18 |
| 4571263 | Recovery of gold from refractory auriferous iron-containing sulphidic concentrates | Roman M. Genik-Sas-Berezowsky | 1986-02-18 |
| 4571262 | Recovery of platinum group metals from nickel-copper-iron matte | Derek G. E. Kerfoot, Russell P. Kofluk | 1986-02-18 |
| 4545963 | Process for separately recovering zinc and lead values from zinc and lead containing sulphidic ore | Ian M. Masters, Barry N. Doyle, Michael E. Chalkley | 1985-10-08 |
| 4510028 | Process for recovering zinc from zinc ferrite material | Gerald L. Bolton | 1985-04-09 |
| 4505744 | Recovery of zinc from zinc containing sulphidic material | Ian M. Masters, Gerald L. Bolton | 1985-03-19 |
| 4443253 | Recovery of zinc from zinc containing sulphidic materials | Ian M. Masters | 1984-04-17 |
| 4440569 | Recovery of zinc from zinc-containing sulphidic material | Ian M. Master | 1984-04-03 |
| 4423007 | Removal of radium from aqueous sulphate solutions | Ian M. Masters, Manfred G. Neven | 1983-12-27 |
| 4406864 | Recovery of uranium from material containing iron, arsenic and siliceous matter | Ian M. Masters, Roman M. Genik-Sas-Berezowsky | 1983-09-27 |
| 4405566 | Removal of uranium from sulphate solutions containing molybdenum | Roman M. Genik-Sas-Berezowsky | 1983-09-20 |
| 4405570 | Removal of dissolved cadmium and copper from sulphate solution with hydrogen sulfide | Jack Van der Meulen | 1983-09-20 |
| 4374808 | Removal of selenium from acidic copper/nickel solutions | Derek G. E. Kerfoot, Zdenek Hofirek | 1983-02-22 |
| 4366128 | Removal of arsenic from aqueous solutions | Ian M. Masters | 1982-12-28 |
| 4330508 | Removal of selenium (IV) and (VI) from acidic copper sulphate solutions | Derek G. E. Kerfoot, Hugh C. Scheie | 1982-05-18 |
| 4279867 | Process for the recovery of copper and zinc values from sulphidic ore | — | 1981-07-21 |