Gaz de France-(GDF) Service National
13Patents
0Active
13Granted
34Portfolio score
Filing activity: Jul 10, 1997 → Apr 11, 2003
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5957539A | Process for excavating a cavity in a thin salt layer | Fixed Constructions | 75 | Expired |
| US5989015A | Variable flame retention device utilizing an interwoven flexible wire metal gauze | Mechanical Engineering; Lighting; Heating | 53 | Expired |
| US5943881A | Cooling process and installation, in particular for the liquefaction of natural gas | Emerging Cross-Sectional Technologies | 25 | Expired |
| US6068426A | Method of connecting conduits | Mechanical Engineering; Lighting; Heating | 11 | Expired |
| US6434776B1 | Tube scraping device | Performing Operations; Transporting | 10 | Expired |
| US6036795A | Butt-welding process using an automatically controlled electro-welding machine | Performing Operations; Transporting | 8 | Expired |
| US6328072A | Universal safety device and process for protecting a pipeline | Emerging Cross-Sectional Technologies | 8 | Expired |
| US6588416B2 | Radiant device with gas burner and recirculation, adapted in view of reduced production of nitrogen oxides | Emerging Cross-Sectional Technologies | 5 | Expired |
| US5960781A | Oven equipped with a movable heat generating means | Mechanical Engineering; Lighting; Heating | 3 | Expired |
| US5988760A | Process for hollowing out a cavity formed of a plurality of sub-cavities in a thin layer of salt | Fixed Constructions | 3 | Expired |
| US6224116A | Device for holding pipe on a branch connector | Mechanical Engineering; Lighting; Heating | 2 | Expired |
| US6410878B1 | Method for producing a flame support | Mechanical Engineering; Lighting; Heating | 1 | Expired |
| US7200456B2 | Identification process that makes it possible to confer traceability to manufactured products | Physics | 0 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.