Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10392260 | Method of treating phosphate-containing ash from waste-incineration plants by wet-chemical digestion in order to obtain compounds of aluminium, calcium, phosphorus and nitrogen | Martin Lebek | 2019-08-27 |
| 10329153 | Method for purifying raw phosphoric acid (e.g. MGA acid) by adding ashes originating from waste incineration plants, comprising the production of pure phosphoric acid, calcium sulfate, water-soluble calcium hydrogen phosphates and metal salt solution | Martin Lebek | 2019-06-25 |
| 6814947 | Method for producing calcium compounds containing water of crystallization | Ansgar Fendel, Hubert Bings | 2004-11-09 |
| 4861492 | Method of dewatering sewage sludge particularly on recessed plate pressing equipment | Ulrich Nikesch, Kurt Presslein | 1989-08-29 |