Hans Heumann

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Herne, DE

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Patents Grantslast 30 patents

Information Patent Grant
Method of preparing fertilizers with retarded nutrient release
- Patent number 4,142,885
- Issue date Mar 6, 1979
- Veba-Chemie Aktiengesellschaft
- Hans Heumann
- C05 - FERTILISERS MANUFACTURE THEREOF
Information Patent Grant
Process for the manufacture of ammonium polyphosphate
- Patent number 4,104,362
- Issue date Aug 1, 1978
- Veba-Chemie Aktiengesellschaft
- Heinrich Hahn
- C05 - FERTILISERS MANUFACTURE THEREOF