Inventor · disambiguated record
Friedrich Kolkmann
Also filed as: KOLKMANN FRIEDRICH
6 granted patents·20 citations·filing 1986–1989
77Inventor score
Technology areasC01B
Files withHOECHST AG6
Top patents by PatentIndex Score
6 records- 0154US4762693AProcess for working up heavy metal-containing residues originally from the decontamination of crude phosphoric acidHOECHST AG·Filed 1987·Granted Aug 9, 1988·10 cites·3 claims
- 0234US4889702AProcess for removing metallic constituents from dust obtained during the electrothermal production of yellow phosphorusHOECHST AG·Filed 1988·Granted Dec 26, 1989·4 cites·4 claims
- 0332US4906445AContinuous process for complete removal or organic impurities from and complete decolorization of prepurified wet-process phosphoric acidHOECHST AG·Filed 1989·Granted Mar 6, 1990·2 cites·10 claims
- 0429US4904459AProcess for working up dusts which are produced in the electrothermal production of phosphorusHOECHST AG·Filed 1989·Granted Feb 27, 1990·3 cites·12 claims
- 0529US4780294AProcess for making crude phosphoric acidHOECHST AG·Filed 1987·Granted Oct 25, 1988·1 cites·3 claims
- 0627US4683127AProcess for making wet-process phosphoric acidHOECHST AG·Filed 1986·Granted Jul 28, 1987·0 cites·5 claims
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