Elf Aquitaine Production
58Patents
0Active
58Granted
40Portfolio score
Filing activity: Jan 18, 1990 → May 12, 1998
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6011334A | In-line fluid-driven electric power generator | Electricity | 94 | Expired |
| US5788000A | Stabilizer-reamer for drilling an oil well | Fixed Constructions | 87 | Expired |
| US5940777A | Automatic seismic pattern recognition method | Emerging Cross-Sectional Technologies | 75 | Expired |
| US5523493A | Process for the production of at least one alkyl tertiobutyl ether from natural gas | Chemistry; Metallurgy | 65 | Expired |
| US5620048A | Oil-well installation fitted with a bottom-well electric pump | Mechanical Engineering; Lighting; Heating | 64 | Expired |
| US5659090A | Steps in a process for the production of at least one alkyl tertiobutyl ether from natural gas | Chemistry; Metallurgy | 63 | Expired |
| US5493288A | System for multidirectional information transmission between at least two units of a drilling assembly | Physics | 50 | Expired |
| US6011557A | Method for obtaining a representation of a geological structure | Fixed Constructions | 44 | Expired |
| US5630906A | Process for the delignifcation and bleaching of a lignocellulose material | Performing Operations; Transporting | 42 | Expired |
| US5812493A | Method of representing the trajectory of at least one borehole in a space-time domain | Physics | 33 | Expired |
| US5421165A | Process for denitrogenation of a feedstock of a liquefied mixture of hydrocarbons consisting chiefly of methane and containing at least 2 mol % of nitrogen | Mechanical Engineering; Lighting; Heating | 31 | Expired |
| US6011094A | Process for the preparation of bitumen-polymer compositions containing a crosslinked elastomer and a functionalized olefinic polymer | Chemistry; Metallurgy | 28 | Expired |
| US5209914A | Liquid absorbing acidic gases and use thereof of in deacidification of gases | Emerging Cross-Sectional Technologies | 28 | Expired |
| US5784335A | Method for making a 3-D cube of near traces from data acquired in a marine reflection seismic survey | Physics | 21 | Expired |
| US5616244A | Cyclone separator having an incorporated coalescer | Performing Operations; Transporting | 19 | Expired |
| US5774418A | Method for on-line acoustic logging in a borehole | Physics | 19 | Expired |
| US5565624A | Method of determining variations in the morphology of a borehole | Physics | 17 | Expired |
| US5616842A | Device for evaluation of the lubricating charcteristics of a drilling mud | Physics | 16 | Expired |
| US5332500A | Three-phase cyclone separator | Performing Operations; Transporting | 15 | Expired |
| US6017507A | Process for oxidation of H.sub.2 S to sulphur | Emerging Cross-Sectional Technologies | 15 | Expired |
| US5508013A | Process for the production of sulphur from at least one sour gas containing hydrogen sulphide and a fuel effluent and thermal reactor | Chemistry; Metallurgy | 14 | Expired |
| US5277885A | Liquid absorbing acidic gases and use thereof in deacidification of gases | Emerging Cross-Sectional Technologies | 14 | Expired |
| US5747673A | Method for measuring with great precision the volume variation occurring when fluid phases mix in order to determine physico-chemical characteristics | Physics | 13 | Expired |
| US5817889A | Process for the purification of a glycol solution | Chemistry; Metallurgy | 13 | Expired |
| US5959203A | Method for automatic identification of the nature of a hydrocarbon production well | Fixed Constructions | 12 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.