Electricite de France - Service National
141Patents
0Active
141Granted
42Portfolio score
Filing activity: May 14, 1974 → Oct 7, 2003
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5583940A | Method, apparatus and device for enciphering messages transmitted between interconnected networks | Electricity | 87 | Expired |
| US4713552A | Optical probe | Emerging Cross-Sectional Technologies | 43 | Expired |
| US7026258B2 | Method for making thin-film semiconductors based on I-III-VI2 compounds, for photovoltaic applications | Emerging Cross-Sectional Technologies | 42 | Expired |
| US4705259A | Device for sealing an opening and slide valve comprising such a device | Mechanical Engineering; Lighting; Heating | 39 | Expired |
| US4045286A | Molten fuel-salt reactor | Emerging Cross-Sectional Technologies | 38 | Expired |
| US4918492A | Michaelson optical fiber interferometer and its application in particular in the measurement of temperatures | Physics | 36 | Expired |
| US4101793A | Rotating machine using a cooling fluid supplied by a rotating seal | Emerging Cross-Sectional Technologies | 31 | Expired |
| US4321945A | Damped fluid pressure relief valve | Emerging Cross-Sectional Technologies | 29 | Expired |
| US3975943A | Method for detecting steam leakage in heat-exchanger having circulation tubes surrounded by liquid sodium and devices for the application of said method | Emerging Cross-Sectional Technologies | 27 | Expired |
| US6924992B2 | Method and device for controlling power supply | Emerging Cross-Sectional Technologies | 26 | Expired |
| US4589440A | Device for controlling the flowrate of a fluidmore particularly a radioactive fluid | Emerging Cross-Sectional Technologies | 24 | Expired |
| US3951566A | Axial-flow fan with by-pass pipe or pipes | Mechanical Engineering; Lighting; Heating | 22 | Expired |
| US4676893A | Apparatus for the recovery of living organisms on the rotary filters of water pumping stations | Emerging Cross-Sectional Technologies | 21 | Expired |
| US5657706A | Apparatus for processing and vitrifying waste | Emerging Cross-Sectional Technologies | 21 | Expired |
| US5700442A | Insertion compounds based on manganese oxide usable as the positive electrode active material in a lithium battery | Emerging Cross-Sectional Technologies | 20 | Expired |
| US4166362A | Methods of and thermodynamic apparatuses for power production | Mechanical Engineering; Lighting; Heating | 19 | Expired |
| US5072553A | Shell structure for a cooling tower | Emerging Cross-Sectional Technologies | 18 | Expired |
| US4590430A | Apparatus for monitoring cell capacity in a storage battery | Emerging Cross-Sectional Technologies | 18 | Expired |
| US4364239A | Hot water supply apparatus comprising a thermodynamic circuit | Emerging Cross-Sectional Technologies | 18 | Expired |
| US6397621B1 | Heating pumping installation, in particular with a refrigeration function | Mechanical Engineering; Lighting; Heating | 17 | Expired |
| US4987828A | Inductive heating apparatus for cooking thin dishes such as omelets, quiches or the like | Emerging Cross-Sectional Technologies | 17 | Expired |
| US4076585A | Method of continuous testing for leak-tightness and mechanical resistance of a reactor vessel jacket and a reactor in which said method is employed | Emerging Cross-Sectional Technologies | 16 | Expired |
| US4792652A | Electric induction cooking appliance with reduced harmonic emission | Emerging Cross-Sectional Technologies | 15 | Expired |
| US3968653A | Apparatus for the removal of after heat in a sodium-cooled fast reactor | Emerging Cross-Sectional Technologies | 15 | Expired |
| US4686067A | Process for eliminating deposits formed in a steam generator of a pressurized water nuclear reactor | Physics | 15 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.