Inventor · disambiguated record
Josef Lehmkuhl
Also filed as: LEHMKUHL JOSEF
4 granted patents·30 citations·filing 1987–2014
71Inventor score
Top patents by PatentIndex Score
4 records- 0168US10329153B2Method 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 solutionREMONDIS AQUA GMBH & CO KG·Filed 2014·Granted Jun 25, 2019·2 cites·19 claims
- 0262US10392260B2Method of treating phosphate-containing ash from waste-incineration plants by wet-chemical digestion in order to obtain compounds of aluminium, calcium, phosphorus and nitrogenREMONDIS AQUA GMBH & CO KG·Filed 2014·Granted Aug 27, 2019·1 cites·20 claims
- 0352US4861492AMethod of dewatering sewage sludge particularly on recessed plate pressing equipmentNALCO CHEMICAL CO·Filed 1987·Granted Aug 29, 1989·24 cites·6 claims
- 0425US6814947B1Method for producing calcium compounds containing water of crystallizationRETHMANN LIPPEWERK GMBH·Filed 1998·Granted Nov 9, 2004·3 cites·23 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →