Asarco LLC
57Patents
2Active
57Granted
37Portfolio score
Filing activity: Aug 22, 1973 → Dec 20, 2011 · 1 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4789445A | Method for the electrodeposition of metals | Physics | 31 | Expired |
| US4629516A | Process for strengthening lead-antimony alloys | Chemistry; Metallurgy | 29 | Expired |
| US5849172A | Copper solvent extraction and electrowinning process | Emerging Cross-Sectional Technologies | 20 | Expired |
| US4336237A | Removal of mercury from sulfuric acid | Chemistry; Metallurgy | 19 | Expired |
| US6192969A | Casting of high purity oxygen free copper | Performing Operations; Transporting | 13 | Expired |
| US4902191A | Pail lifter | Performing Operations; Transporting | 12 | Expired |
| US4753688A | Process for strengthening lead-antimony alloys | Chemistry; Metallurgy | 12 | Expired |
| US4489109A | Process for applying latex rubber coatings to asbestos-cement products | Emerging Cross-Sectional Technologies | 12 | Expired |
| US5133948A | Process for the removal of bismuth from copper refining electrolyte by using lead oxide | Chemistry; Metallurgy | 12 | Expired |
| US4337083A | Non-polluting, cooling method and heat recuperative sintering method | Emerging Cross-Sectional Technologies | 11 | Expired |
| US3941609A | Zinc dust, its preparation, and apparatus for preparing same | Chemistry; Metallurgy | 11 | Expired |
| US5935409A | Fluoboric acid control in a ferric fluoborate hydrometallurgical process for recovering metals | Emerging Cross-Sectional Technologies | 10 | Expired |
| US5540749A | Production of spherical bismuth shot | Performing Operations; Transporting | 8 | Expired |
| US3969202A | Process for the recovery of antimony values from ores containing sulfo-antimony compounds of copper, and arsenic | Emerging Cross-Sectional Technologies | 8 | Expired |
| US5850034A | Making of metal products using a gas analyzer | Emerging Cross-Sectional Technologies | 7 | Expired |
| US5614038A | Method for making machinable lead-free copper alloys with additive | Chemistry; Metallurgy | 7 | Expired |
| US4239081A | Side dam apparatus for use in twin-belt continuous casting machines | Performing Operations; Transporting | 7 | Expired |
| US5242571A | Method and apparatus for the electrolytic production of copper wire | Chemistry; Metallurgy | 6 | Expired |
| US4333763A | Low temperature, non-SO.sub.2 polluting, kettle process for separation of lead from lead sulfide-containing material | Chemistry; Metallurgy | 6 | Expired |
| US4027001A | Process for recovering sulfur from sulfur dioxide | Chemistry; Metallurgy | 6 | Expired |
| US4033761A | Process for the separation of copper sulfide from metallic lead entrained in a dross | Emerging Cross-Sectional Technologies | 6 | Expired |
| US5762683A | Ferric fluoborate/organic extractant hydrometallurgical process for recovering metals | Emerging Cross-Sectional Technologies | 6 | Expired |
| US4404026A | Process for separation of dross elements combining sodium addition to molten bullion followed by controlled solidification of casting | Chemistry; Metallurgy | 5 | Expired |
| US3959451A | Recovery of sulfur dioxide from gas mixtures | Performing Operations; Transporting | 5 | Expired |
| US5103892A | Continuous casting of discrete shapes | Performing Operations; Transporting | 5 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.