Degremont SA
12Patents
1Active
12Granted
33Portfolio score
Filing activity: Mar 12, 1975 → May 22, 2006 · 1 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US3956128A | Apparatus for treating industrial and domestic waste waters | Emerging Cross-Sectional Technologies | 66 | Expired |
| US5043071A | Method of backwashing tubular filter membranes, and apparatus for implementing the method | Performing Operations; Transporting | 33 | Expired |
| US4192742A | Process and apparatus for the biological treatment of waste water | Emerging Cross-Sectional Technologies | 30 | Expired |
| US6277285A | Process for the clarification of liquids and suspensions | Chemistry; Metallurgy | 26 | Expired |
| US4787978A | Method for the purification of waste water, notably of urban waste water | Emerging Cross-Sectional Technologies | 17 | Expired |
| USD247248S | Diffusion plate for oxygenation treatment of sludge or the like | General | 15 | Expired |
| US5147547A | Oxidation and biological reduction reactor, biofiltration method and washing methods used in this reactor | Emerging Cross-Sectional Technologies | 13 | Expired |
| US4793926A | Lamellar decanter | Performing Operations; Transporting | 12 | Expired |
| US4746431A | Device for the collection of water in a granular material bed filter | Performing Operations; Transporting | 7 | Expired |
| US8728402B2 | Ozone generator | Chemistry; Metallurgy | 4 | Active |
| US4818393A | Apparatus for the anaerobic treatment of waste water | Emerging Cross-Sectional Technologies | 2 | Expired |
| US5368730A | Filtering apparatus | Performing Operations; Transporting | 0 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.