Pentti Hietala

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Helsinki, FI

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Patents Grantslast 30 patents

Information Patent Grant
Method of extracting sennosides A, B and A1
- Patent number 5,710,260
- Issue date Jan 20, 1998
- Madaus AG
- Alfons Carcasona
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Method of preparing diacetyl rhein
- Patent number 5,393,898
- Issue date Feb 28, 1995
- Madaus AG
- Alfons Carcasona
- C07 - ORGANIC CHEMISTRY