Issued Patents All Time
Showing 26–50 of 56 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5756048 | Modernization of a reactor | Umberto Zardi | 1998-05-26 |
| 5750080 | Method for in-situ modernization of a urea synthesis reactor | — | 1998-05-12 |
| 5684194 | Process for urea production involving a carbon dioxide stripping step | — | 1997-11-04 |
| 5681537 | Plant for urea production involving a carbon dioxide stripping step | — | 1997-10-28 |
| 5660801 | Process and apparatus for the revamping of urea synthesis plants consisting of a stripper with ammonia | Umberto Zardi | 1997-08-26 |
| 5585074 | Method and apparatus for in-situ modernization of a heterogeneous exothermic synthesis reactor, particularly of the so-called kellogg type | Umberto Zardi, Ermanno Filippi | 1996-12-17 |
| 5580236 | Plant for urea production | — | 1996-12-03 |
| 5573734 | Plant for the production of urea in reaction spaces with different yields | — | 1996-11-12 |
| 5573735 | Method of retrofitting urea production plant | — | 1996-11-12 |
| 5523482 | Process and plant for the production of urea in reaction spaces with different yields | — | 1996-06-04 |
| 5403956 | Process for urea production | — | 1995-04-04 |
| 5380943 | Process and plant for the production of urea with differentiated yield reaction spaces | Umberto Zardi | 1995-01-10 |
| 5276183 | Process and plant for the production of urea | Umberto Zardi | 1994-01-04 |
| 5254316 | Reactors for heterogeneous synthesis | Umberto Zardi | 1993-10-19 |
| 5184386 | Method for retrofitting carbon monoxide conversion reactors | Umberto Zardi | 1993-02-09 |
| 5176800 | Process for the modernization of existing urea plants and a modernized urea plant | Umberto Zardi | 1993-01-05 |
| 5171543 | Reactor for exothermic heterogeneous synthesis reactions | Umberto Zardi | 1992-12-15 |
| 5152977 | Process for exothermic heterogeneous synthesis with external recovery of heat | Umberto Zardi | 1992-10-06 |
| 5135722 | Converters for heterogeneous catalytic synthesis, particularly for ammonia and methanol, under pressure | Umberto Zardi | 1992-08-04 |
| 5130098 | System to improve the efficiency of heterogeneous reactors for exothermic synthesis and more particularly for the reaction of ammonia | Umberto Zardi | 1992-07-14 |
| 5006316 | Reactors for heterogeneous synthesis | Umberto Zardi | 1991-04-09 |
| 4963338 | Process for heterogeneous synthesis and related reactors | Umberto Zardi | 1990-10-16 |
| 4935210 | System for reducing energy consumption in multi-unit reactors for heterogeneous synthesis and related reactors | Umberto Zardi | 1990-06-19 |
| 4758311 | Method for avoiding the corrosion of the strippers in the urea manufacturing plants | Giuseppe Faita, Ubaldo Grassini | 1988-07-19 |
| 4747915 | Falling-film process for the cocurrent evaporation of a solution | — | 1988-05-31 |