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UNITED UTILITIES PLC patents filed
Company number: 02366616| Title | Date Filed | Status | Publication number |
|---|---|---|---|
| A process for forming sludge cake from sewage sludge by mesophilic/thermophilic fermentation | 2008-04-21 | Terminated | GB2459445 |
| Dewatering of Sludge by Fermentation | 2007-12-06 | Terminated | GB2455335 |
| Method and composition for removal of hydrogen sulphide from gas | 2007-11-08 | Terminated | GB2454490 |
| Method and Apparatus for Aeration | 2007-08-15 | Terminated | GB2451870 |
| Treatment of putrescible cakes | 2005-09-29 | Ceased | GB2430673 |
| Sludge treatment | 2004-11-17 | Granted | GB2422600 |
| Apparatus for ascertaining the material of a buried pipe | 2001-11-24 | Terminated | GB2374938 |
| Autothermal aerobic digestion of sewage sludge | 2000-10-18 | Terminated | GB2368837 |
| Sludge clarifier with shear inducing elements | 2000-03-21 | Terminated | GB2362837 |
| Shaft cover and anchoring assembly | 1998-12-12 | Terminated | GB2345511 |
| Portable apparatus for calibrating a probe | 1996-11-21 | Ceased | GB2319614 |
| Separating floating solids from a liquid | 1996-10-12 | Terminated | GB2318070 |
| A self-cleaning filter system | 1996-07-29 | Terminated | GB2315684 |
| Rotating Screen and Drive Unit | 1996-03-04 | Granted | GB2314033 |
| Machines with rotors; accumulation prevention | 1996-02-16 | Terminated | GB2310252 |
| Apparatus for and method of removing and replacing a pipeline component | 1995-12-20 | Ceased | GB2296305 |
| Quantitative detection of chemical species | 1995-12-08 | Ceased | GB2310717 |
| Optical instrument | 1995-11-23 | Ceased | GB2310282 |
| Sampling water pipe debris | 1995-07-21 | Granted | GB2291403 |
| Hole cutting apparatus | 1994-12-16 | Ceased | GB2301301 |
| Apparatus and method for removing piping from the ground | 1994-11-14 | Ceased | GB2285297 |
| Disintection of water outlets | 1994-10-13 | Ceased | GB2283424 |
| Sludge biocombustion | 1993-12-04 | Terminated | GB2284413 |
| Branch Connection Seal | 1993-09-25 | Terminated | GB2282425 |
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