Hans-Albrecht Freitag

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Coraopolis, PA, US

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Patents Grantslast 30 patents

Information Patent Grant
Process for the production of optionally foamed polyurethanes which...
- Patent number 4,761,307
- Issue date Aug 2, 1988
- Bayer Aktiengesellschaft
- Peter Haas
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information Patent Grant
Process for the production of polyurethanes
- Patent number 4,644,016
- Issue date Feb 17, 1987
- Bayer Aktiengesellschaft
- Werner Rasshofer
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information Patent Grant
Process for the production of polyisocyanate addition products and...
- Patent number 4,644,017
- Issue date Feb 17, 1987
- Bayer Aktiengesellschaft
- Peter Haas
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...