Cominco, Ltd.
114Patents
1Active
114Granted
42Portfolio score
Filing activity: Oct 19, 1973 → Dec 2, 1999
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4743428A | Method for agitating metals and producing alloys | Mechanical Engineering; Lighting; Heating | 139 | Expired |
| US4717540A | Method and apparatus for dissolving nickel in molten zinc | Mechanical Engineering; Lighting; Heating | 127 | Expired |
| US5013358A | Method for the recovery of mercury from mercury-containing material | Emerging Cross-Sectional Technologies | 77 | Expired |
| US4291443A | Forming expanded mesh sheet from deformable strip | Emerging Cross-Sectional Technologies | 53 | Expired |
| US4315356A | Forming expanded mesh sheet from deformable strip | Emerging Cross-Sectional Technologies | 46 | Expired |
| US4297866A | Asymmetrical shaping of slit segments of meshes formed in deformable strip | Emerging Cross-Sectional Technologies | 45 | Expired |
| US5462109A | Method and apparatus for producing metal strip | Performing Operations; Transporting | 45 | Expired |
| US4838935A | Method for making tungsten-titanium sputtering targets and product | Chemistry; Metallurgy | 37 | Expired |
| US4169170A | Control of dust during coal transportation | Chemistry; Metallurgy | 35 | Expired |
| US5135652A | Method for the solvent extraction of zinc | Emerging Cross-Sectional Technologies | 33 | Expired |
| US4097271A | Hydrometallurgical process for recovering copper and other metal values from metal sulphides | Emerging Cross-Sectional Technologies | 32 | Expired |
| US5084180A | Method for treating zinc-containing sulfate solution | Emerging Cross-Sectional Technologies | 32 | Expired |
| US4330319A | Manufacture of urea sulfur fertilizer | Chemistry; Metallurgy | 31 | Expired |
| US3966568A | Electrowinning of gallium | Chemistry; Metallurgy | 29 | Expired |
| US5167274A | Method and apparatus for cooling particulate solids | Emerging Cross-Sectional Technologies | 21 | Expired |
| US4324621A | Method and apparatus for controlling the quality of electrolytes | Physics | 20 | Expired |
| US3998610A | Rotating concentric homogeneous turbulence centrifuge | Emerging Cross-Sectional Technologies | 20 | Expired |
| US4715939A | Method for removal of monovalent ions from ZnSO.sub.4 electrolyte by electrodialysis | Performing Operations; Transporting | 19 | Expired |
| US4157912A | Process for recovery of copper and zinc from complex sulphides | Chemistry; Metallurgy | 18 | Expired |
| US3961752A | Method and apparatus for dust control treatment | Fixed Constructions | 18 | Expired |
| US4564508A | Process for the recovery of sodium carbonate from salt mixtures | Chemistry; Metallurgy | 18 | Expired |
| US4719009A | Silica depressant in froth flotation of sulfide ores | Performing Operations; Transporting | 18 | Expired |
| US4024218A | Process for hydrometallurgical upgrading | Emerging Cross-Sectional Technologies | 16 | Expired |
| US3964901A | Production of copper and sulfur from copper-iron sulfides | Emerging Cross-Sectional Technologies | 15 | Expired |
| US4035280A | Contact bar for electrolytic cells | Chemistry; Metallurgy | 14 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.