Robert Steffens

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Cologne, DE

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Patents Grantslast 30 patents

Information Patent Grant
Pest-combating agents based on substituted 1,4-naphthoquinones and...
- Patent number 4,970,328
- Issue date Nov 13, 1990
- Bayer Aktiengesellschaft
- Werner Lindner
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Pest-combating agents based on substituted 1,4-naphthoquinones and...
- Patent number 4,929,642
- Issue date May 29, 1990
- Bayer Aktiengesellschaft
- Werner Lindner
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Substituted furazans and insecticidal and acaricidal use
- Patent number 4,853,397
- Issue date Aug 1, 1989
- Bayer Aktiengesellschaft
- Wilhelm Sirrenberg
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Pesticidal cyclic malonylphosphonic diamides
- Patent number 4,804,655
- Issue date Feb 14, 1989
- Bayer Aktiengesellschaft
- Nikolaus Muller
- C07 - ORGANIC CHEMISTRY