Noranda Mines Limited
51Patents
0Active
51Granted
39Portfolio score
Filing activity: May 1, 1974 → Sep 28, 1982
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4470907A | Continuous polymer feed system for a waste water treatment plant | Chemistry; Metallurgy | 50 | Expired |
| US4039406A | Recovering copper from concentrates with insoluble sulfate forming leach | Emerging Cross-Sectional Technologies | 49 | Expired |
| US4096437A | Magnetic testing device for detecting loss of metallic area and internal and external defects in elongated objects | Physics | 46 | Expired |
| US4338168A | Hydrometallurgical treatment of copper-bearing hematite residue | Emerging Cross-Sectional Technologies | 42 | Expired |
| US4466824A | Transferred-arc plasma reactor for chemical and metallurgical applications | Electricity | 31 | Expired |
| US4376010A | Spray drying with a plasma of superheated steam | Performing Operations; Transporting | 29 | Expired |
| US4402359A | Heat transfer device having an augmented wall surface | Mechanical Engineering; Lighting; Heating | 25 | Expired |
| US4085016A | Method and apparatus for the oxidation of organic material present in concentrated sulfuric acid | Chemistry; Metallurgy | 24 | Expired |
| US4223549A | Oxygen monitoring circuit with built in testing means | Physics | 18 | Expired |
| US4059016A | Froth level monitor | Performing Operations; Transporting | 17 | Expired |
| US4216575A | Method of reforming the fins of a finned tube | Emerging Cross-Sectional Technologies | 16 | Expired |
| US3941669A | Fluidized bed electrode system | Chemistry; Metallurgy | 15 | Expired |
| US4294274A | Hydrogen injection into gas pipelines and other pressurized containers | Emerging Cross-Sectional Technologies | 15 | Expired |
| US4207147A | Electrode for the electrolytic deposition of metals | Chemistry; Metallurgy | 14 | Expired |
| US4181699A | Apparatus for detecting the presence of a specific substance in a gas stream | Physics | 13 | Expired |
| US4047939A | Slimes treatment process | Emerging Cross-Sectional Technologies | 12 | Expired |
| US4003814A | Apparatus for the continuous measurement of the oxygen content of molten copper or alloys thereof | Physics | 11 | Expired |
| US4005856A | Process for continuous smelting and converting of copper concentrates | Chemistry; Metallurgy | 10 | Expired |
| US4212722A | Apparatus for electrowinning metal from metal bearing solutions | Chemistry; Metallurgy | 10 | Expired |
| US3973761A | Furnace tapping apparatus | Chemistry; Metallurgy | 9 | Expired |
| US4307609A | Liquid density meter | Physics | 9 | Expired |
| US4136567A | Pulp density meter | Physics | 8 | Expired |
| US4015099A | Method of joining a copper contact button to the aluminum headbar of an electrode plate | Chemistry; Metallurgy | 8 | Expired |
| US4141804A | Process for electrowinning metal from metal bearing solutions | Chemistry; Metallurgy | 8 | Expired |
| US4046323A | Process for controlled slow cooling of non-ferrous smelting slags | Emerging Cross-Sectional Technologies | 8 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.