Urea Casale SA
64Patents
17Active
64Granted
38Portfolio score
Filing activity: Jan 15, 1992 → Nov 17, 2009 · 18 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5306355A | System for the passivation of metal surfaces affected by operating conditions and agents promoting corrosion | Chemistry; Metallurgy | 25 | Expired |
| US8367867B2 | Process and plant for urea production | Performing Operations; Transporting | 22 | Active |
| US6340451B1 | Method for the simultaneous modernization of a plant for ammonia production and a plant for urea production | Emerging Cross-Sectional Technologies | 10 | Expired |
| US6062487A | Method and device for the controlled break-up of liquid jets | Chemistry; Metallurgy | 10 | Expired |
| US5304353A | Apparatus for increasing the yield and the production potential of urea reactors | Performing Operations; Transporting | 10 | Expired |
| US6231827A | Process for combined production of ammonia and urea | Emerging Cross-Sectional Technologies | 10 | Expired |
| US5399755A | Process and equipment for the hydrolysis of residual urea in the water from synthesis plants | Performing Operations; Transporting | 9 | Expired |
| US5681537A | Plant for urea production involving a carbon dioxide stripping step | Emerging Cross-Sectional Technologies | 8 | Expired |
| US6284922A | Method for modernizing a urea production plant | Emerging Cross-Sectional Technologies | 6 | Expired |
| US7220882B2 | Process for urea production and plant | Performing Operations; Transporting | 6 | Expired |
| US5888460A | Reactor for two-phase reactions, in particular for urea synthesis at high pressure and temperature | Emerging Cross-Sectional Technologies | 6 | Expired |
| US6120740A | Reactor for two-phase reactions, in particular for urea synthesis at high pressure and temperature | Emerging Cross-Sectional Technologies | 5 | Expired |
| US6084129A | Process for reducing the residual free ammonia emissions from an urea production plant | Emerging Cross-Sectional Technologies | 5 | Expired |
| US5276183A | Process and plant for the production of urea | Emerging Cross-Sectional Technologies | 5 | Expired |
| US7637966B2 | Fluid bed granulation process and apparatus | Performing Operations; Transporting | 4 | Expired |
| US7966745B2 | Fluid bed granulation process and apparatus | Performing Operations; Transporting | 4 | Expired |
| US5380943A | Process and plant for the production of urea with differentiated yield reaction spaces | Emerging Cross-Sectional Technologies | 4 | Expired |
| US8721975B2 | Plant for urea production | Emerging Cross-Sectional Technologies | 4 | Active |
| US5403956A | Process for urea production | Emerging Cross-Sectional Technologies | 4 | Expired |
| US5660801A | Process and apparatus for the revamping of urea synthesis plants consisting of a stripper with ammonia | Emerging Cross-Sectional Technologies | 3 | Expired |
| US7982068B2 | Process for urea production and related plant | Chemistry; Metallurgy | 3 | Active |
| US5684194A | Process for urea production involving a carbon dioxide stripping step | Emerging Cross-Sectional Technologies | 3 | Expired |
| US6150555A | Process for urea production | Emerging Cross-Sectional Technologies | 3 | Expired |
| US6926869B2 | Apparatus for carbamate decomposition and ammonia and carbon dioxide stripping from urea solutions capable of 180 degree inversion about a horizontal axis | Performing Operations; Transporting | 3 | Expired |
| US6334984B1 | Hydrolysis reactor for removal of urea, ammonia and carbon dioxide from a liquid phase comprising urea in aqueous solution | Emerging Cross-Sectional Technologies | 3 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.