Entreprise de Recherches et d'Activities Petrolieres Elf
Patent Applications and Registrations
Patent applications and USPTO patent grants for Entreprise de Recherches et d'Activities Petrolieres Elf.The latest application filed is for "safety plug for sealing-off the tubing of a producing oil or gas well".
- Entreprise de Recherches et d'Activities Petrolieres Elf - Paris FR
- Entreprise de Recherches et d'Activities Petrolieres (Elf) - Elf
| Patent | Date |
|---|---|
| Safety plug for sealing-off the tubing of a producing oil or gas well Grant 3,954,138 - Miffre May 4, 1 | 1976-05-04 |
| Method and device for rapid chromatographic separation Grant 3,954,608 - Valentin May 4, 1 | 1976-05-04 |
| Device for automatic analysis mass spectrometry Grant 3,943,363 - Amblard March 9, 1 | 1976-03-09 |
| Installation For Separation On The Seabed Of The Effluents From Underwater Oil Wells Grant 3,875,998 - Charpentier April 8, 1 | 1975-04-08 |
| Drilling Bits For Boring Holes And Wells Grant 3,861,477 - Lazayres January 21, 1 | 1975-01-21 |
| Cable Tool For Setting Liners Grant 3,845,819 - Mourlevat November 5, 1 | 1974-11-05 |
| Spoon For Plugging Cased Petroleum Production Wells Grant 3,760,877 - De Lajarte , et al. September 25, 1 | 1973-09-25 |
| Couplings For Tools And Safety Devices Used In Oil-wells Grant 3,697,104 - Soulie , et al. October 10, 1 | 1972-10-10 |
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