Manfred Ehlert

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Dormagen, DE

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Patents Grantslast 30 patents

Information Patent Grant
Preparation of ethers of diphenols
- Patent number 5,288,923
- Issue date Feb 22, 1994
- Bayer Aktiengesellschaft
- Gerhard Fennhoff
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Purification of polycarbonate, polyester carbonate or polyester waste
- Patent number 5,214,072
- Issue date May 25, 1993
- Bayer Aktiengesellschaft
- Gerhard Fennhoff
- B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
Information Patent Grant
Purification of polycarbonate and polyester carbonate waste
- Patent number 5,151,452
- Issue date Sep 29, 1992
- Bayer Aktiengesellschaft
- Gerhard Fennhoff
- B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL