SNAMPROGETTI S.p.A.
340Patents
8Active
340Granted
42Portfolio score
Filing activity: May 21, 1970 → Jun 27, 2007 · 7 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4410501A | Preparation of porous crystalline synthetic material comprised of silicon and titanium oxides | Emerging Cross-Sectional Technologies | 254 | Expired |
| US5449440A | Process for separating alcohols from mixtures of alcohols, water and other compounds | Emerging Cross-Sectional Technologies | 132 | Expired |
| US5430219A | Integrated process for producing olefins from methane-containing gas mixtures | Emerging Cross-Sectional Technologies | 87 | Expired |
| US4312310A | Pollution-preventing and driving device for internal combustion engines | Emerging Cross-Sectional Technologies | 80 | Expired |
| US5032618A | Process for producing methanol form synthesis gas, in the liquid phase | Chemistry; Metallurgy | 67 | Expired |
| US4657571A | Process for the recovery of heavy constituents from hydrocarbon gaseous mixtures | Mechanical Engineering; Lighting; Heating | 63 | Expired |
| US4026817A | Method for the preparation in a continuous way of water/oil emulsions and apparatus suitable therefor | Performing Operations; Transporting | 57 | Expired |
| US4182726A | Process for the preparation of aromatic carbonates | Chemistry; Metallurgy | 55 | Expired |
| US4666692A | Silica-based synthetic material containing titanium in the crystal lattice and process for its preparation | Emerging Cross-Sectional Technologies | 51 | Expired |
| US5932090A | Process for the conversion of heavy crude oils and distillation residues to distillates | Chemistry; Metallurgy | 49 | Expired |
| US4976849A | Fractionation process for gaseous hydrocarbon mixtures with a high acid gas content | Emerging Cross-Sectional Technologies | 47 | Expired |
| US6914165B2 | Process for obtaining a “diesel cut” fuel by the oligomerization of olefins or their mixtures | Chemistry; Metallurgy | 42 | Expired |
| US4072671A | Method for extracting phenols and oligosaccharides from vegetable tissues | Chemistry; Metallurgy | 39 | Expired |
| US4479741A | Device for laying underground or digging up subsea conduits | Fixed Constructions | 37 | Expired |
| US4233140A | Process for regenerating exhausted oils | Chemistry; Metallurgy | 37 | Expired |
| US6875411B2 | Process for the production of hydrogen | Emerging Cross-Sectional Technologies | 35 | Expired |
| US4545965A | Process of selective separation of hydrogen sulfide from gaseous mixtures containing also carbon dioxide | Emerging Cross-Sectional Technologies | 33 | Expired |
| US4453956A | Recovering condensables from natural gas | Mechanical Engineering; Lighting; Heating | 32 | Expired |
| US4097250A | Method for the purification of natural gas having a high contents of acidic gases | Emerging Cross-Sectional Technologies | 32 | Expired |
| US7404942B2 | Process for the production of hydrogen and the co-production of carbon dioxide | Emerging Cross-Sectional Technologies | 29 | Active |
| US5633421A | Process for dehydrogenating light paraffins in a fluidized bed reactor | Emerging Cross-Sectional Technologies | 29 | Expired |
| US5856585A | Process of catalytic partial oxidation of natural gas in order to obtain synthesis gas and formaldehyde | Emerging Cross-Sectional Technologies | 28 | Expired |
| US4199537A | Liquid distributor for thin-film, tube-bundle apparatus | Performing Operations; Transporting | 28 | Expired |
| US5955640A | Integrated process for the production of butene-1 | Emerging Cross-Sectional Technologies | 28 | Expired |
| US4899825A | Continuous mixing device, particulary suitable for preparing aqueous solutions of foam extinguisher for fire-fighting systems | Performing Operations; Transporting | 27 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.