Pechiney
18Patents
0Active
18Granted
30Portfolio score
Filing activity: Jul 1, 1981 → Jul 24, 2001
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4456480A | Process for purifying metals by segregation | Emerging Cross-Sectional Technologies | 16 | Expired |
| US4588485A | Process for the production of a metal by electrolyzing halides in a molten salt bath, comprising a simultaneous and continuous double deposit | Chemistry; Metallurgy | 14 | Expired |
| US4431491A | Process and apparatus for accurately controlling the rate of introduction and the content of alumina in an igneous electrolysis tank in the production of aluminium | Chemistry; Metallurgy | 12 | Expired |
| US4838988A | Process for obtaining crystals of intermetallic compounds, in particular isolated monocrystals, by cooling alloys in the molten state | Chemistry; Metallurgy | 12 | Expired |
| US4451439A | Process for the purification of solutions containing a sodium or potassium carbonate, sulphate, and possibly hydroxide, and at least one of the metals vanadium, uranium and molybdenum | Chemistry; Metallurgy | 10 | Expired |
| US4747732A | Closed apparatus with potential fluidization for horizontally conveying powder material in a dense bed | Chemistry; Metallurgy | 8 | Expired |
| US6669063B1 | Method for irreversibly fixing a cap on a container head enabling a limited rotation of said cap on said head | Performing Operations; Transporting | 8 | Expired |
| US4764223A | Process for the manufacture of a rough-shaped, cold-rolled cladding tube of zirconium alloy | Emerging Cross-Sectional Technologies | 6 | Expired |
| US4770750A | Process for producing transition metal powders by electrolysis in melted salt baths | Chemistry; Metallurgy | 5 | Expired |
| US4575450A | Process for obtaining extruded semifinished products from high resistance aluminum alloy powder | Performing Operations; Transporting | 5 | Expired |
| US4686025A | Apparatus for the production of a metal by electrolyzing halides in a molten salt bath, by a simultaneous continuous double deposit | Chemistry; Metallurgy | 3 | Expired |
| US4847495A | Method of quantitative analysis by means of the mean atomic number of phases containing a light element using a scanning microscope and an image analyser | Physics | 1 | Expired |
| US4675084A | Process for improving the purity of transition metals produced by electrolysis of halides thereof in a bath of molten salts | Chemistry; Metallurgy | 0 | Expired |
| US4865665A | Metal alloy with large lattice spacing | Chemistry; Metallurgy | 0 | Expired |
| US4444585A | Process for producing metals in a very high state of purity in respect of eutectic elements | Chemistry; Metallurgy | 0 | Expired |
| US4450143A | Process for reducing the organic solvent losses in the treatment of a suspension resulting from the acid attack on an ore | Emerging Cross-Sectional Technologies | 0 | Expired |
| US4898646A | Process for identifying Al alloys by electrochemical means | Physics | 0 | Expired |
| US4657643A | Process for continuously controlling the proportion of metal dissolved in a bath of molten salts and the application thereof to the continuous feed of an electrolysis cell with salts of said metal | Chemistry; Metallurgy | 0 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.