Hans-Joachim Sandhagen

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Dormagen, DE

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Patents Grantslast 30 patents

Information Patent Grant
Process for the production of low viscosity high functionality, lig...
- Patent number 5,625,045
- Issue date Apr 29, 1997
- Bayer Aktiengesellschaft
- Pramod Gupta
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information Patent Grant
Process for the removal of catalysts for polyether polyols
- Patent number 5,105,019
- Issue date Apr 14, 1992
- Bayer Aktiengesellschaft
- Pramod Gupta
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information Patent Grant
Process for the purification of polyethers using a tubular coil eva...
- Patent number 4,143,072
- Issue date Mar 6, 1979
- Bayer Aktiengesellschaft
- Hartmut Hetzel
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...