Lyonnaise des Eaux
14Patents
1Active
14Granted
33Portfolio score
Filing activity: Mar 14, 1988 → Apr 29, 2005 · 1 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4948444A | Process for production of a bundle of hollow semi-permeable fibers | Emerging Cross-Sectional Technologies | 73 | Expired |
| US5069353A | Housing for fiber-bundle filter modules | Performing Operations; Transporting | 50 | Expired |
| US5624565A | Method of Regulating Aeration in a basin for bilogical treatment of wastewater | Emerging Cross-Sectional Technologies | 46 | Expired |
| US5098572A | Method and apparatus for increasing sludge concentration in water purification installations | Emerging Cross-Sectional Technologies | 40 | Expired |
| US4995643A | Device for fixing a water meter on to a base and method relating thereto | Physics | 17 | Expired |
| US5171493A | Process for extruding semi-permeable membrane having separate hollow passageways | Performing Operations; Transporting | 14 | Expired |
| US4917798A | Method of fabricating a perforated plate for a hollow fiber separator apparatus, and devices obtained thereby | Performing Operations; Transporting | 12 | Expired |
| US4916317A | Method and a device for detecting changes in a surface state and for monitoring the surface state | Physics | 7 | Expired |
| US5011613A | Method for regulating the residual free chlorine in water | Chemistry; Metallurgy | 6 | Expired |
| US4990316A | Apparatus for the disolution of ozone in a fluid | Chemistry; Metallurgy | 5 | Expired |
| US4975187A | Filter module including a baffle for protecting a bundle of filter fibers | Performing Operations; Transporting | 5 | Expired |
| US4819482A | Device for connecting and supporting a water-meter | Physics | 4 | Expired |
| US5006229A | Method of manufacturing a unit assembly of filter membranes, a mold used in the method, and a product obtained from the method | Performing Operations; Transporting | 2 | Expired |
| US8720533B2 | Heat exchanger and installation for extracting heat from waste water | Emerging Cross-Sectional Technologies | 0 | Active |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.