Alcan International Limited
497Patents
7Active
497Granted
43Portfolio score
Filing activity: Jan 13, 1981 → Aug 24, 2010 · 7 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4931091A | Treatment of molten light metals and apparatus | Chemistry; Metallurgy | 145 | Expired |
| US4470846A | Removal of alkali metals and alkaline earth metals from molten aluminum | Chemistry; Metallurgy | 126 | Expired |
| US5582884A | Peelable laminated structures and process for production thereof | Emerging Cross-Sectional Technologies | 126 | Expired |
| US5080715A | Recovering clean metal and particulates from metal matrix composites | Emerging Cross-Sectional Technologies | 112 | Expired |
| US5660614A | Gas treatment of molten metals | Chemistry; Metallurgy | 105 | Expired |
| US4657717A | Forming fibre-plastics composites | Performing Operations; Transporting | 103 | Expired |
| US4837061A | Tamper-evident structures | Emerging Cross-Sectional Technologies | 99 | Expired |
| US5218472A | Optical interference structures incorporating porous films | Emerging Cross-Sectional Technologies | 86 | Expired |
| US4782097A | Process for the preparation of hollow microspheres | Chemistry; Metallurgy | 70 | Expired |
| US4859711A | Hollow microspheres | Chemistry; Metallurgy | 69 | Expired |
| US5015318A | Method of making tamper-evident structures | Emerging Cross-Sectional Technologies | 69 | Expired |
| US5084143A | Color change devices incorporating areas of contrasting appearance | Emerging Cross-Sectional Technologies | 67 | Expired |
| US4604177A | Electrolysis cell for a molten electrolyte | Chemistry; Metallurgy | 67 | Expired |
| US6187206A | Thermal plasma reactor and wastewater treatment method | Emerging Cross-Sectional Technologies | 66 | Expired |
| US5149386A | Tamper-evident structures | Emerging Cross-Sectional Technologies | 66 | Expired |
| US5997721A | Cleaning aluminum workpieces | Chemistry; Metallurgy | 58 | Expired |
| US4992638A | Microwave heating device with microwave distribution modifying means | Emerging Cross-Sectional Technologies | 58 | Expired |
| US7448153B2 | Container label with tear-off part | Physics | 57 | Expired |
| US5260144A | Metal/air battery with seeded recirculating electrolyte | Electricity | 57 | Expired |
| US5178967A | Bilayer oxide film and process for producing same | Emerging Cross-Sectional Technologies | 56 | Expired |
| US5425824A | Color-changeable adhesive | Performing Operations; Transporting | 53 | Expired |
| US5055150A | Process and apparatus for producing coated polymer sheets having oxygen and moisture barrier properties and coated polymer sheets thus produced | Performing Operations; Transporting | 52 | Expired |
| US4888459A | Microwave container with dielectric structure of varying properties and method of using same | Emerging Cross-Sectional Technologies | 51 | Expired |
| US5281251A | Process for shape casting of particle stabilized metal foam | Performing Operations; Transporting | 50 | Expired |
| US4814568A | Container for microwave heating including means for modifying microwave heating distribution, and method of using same | Emerging Cross-Sectional Technologies | 47 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.