Guido Steffan

Person

Odenthal, DE

People

Patents Grantslast 30 patents

Information Patent Grant
Method for producing 4,6-dichloropyrimidine
- Patent number 6,822,095
- Issue date Nov 23, 2004
- Bayer Aktiengesellschaft
- Franz-Josef Mais
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Method for producing 4-chloro-6-hydroxypyrimidine
- Patent number 6,562,970
- Issue date May 13, 2003
- Bayer Aktiengesellschaft
- Franz-Josef Mais
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Method for producing 4,6-dichloropyrimidine with sulfur compounds a...
- Patent number 6,525,198
- Issue date Feb 25, 2003
- Bayer Aktiengesellschaft
- Franz-Josef Mais
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Process for converting nitrobenzene to a free aminophenol
- Patent number 6,504,059
- Issue date Jan 7, 2003
- Bayer Aktiengesellschaft
- Franz-Josef Mais
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Substituted cinnamic acids and cinnamic acid esters
- Patent number 6,455,725
- Issue date Sep 24, 2002
- Bayer Aktiengesellschaft
- Walter Lange
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Method of producing 4,6-dichloropyrimidine with acid chlorides
- Patent number 6,441,170
- Issue date Aug 27, 2002
- Bayer Akitnegesellschaft
- Franz-Josef Mais
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Method for the production of 4,6-dichloropyrimidine with the aid of...
- Patent number 6,441,171
- Issue date Aug 27, 2002
- Bayer Aktiengesellschaft
- Franz-Josef Mais
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Process for preparing 2-halogenated indan-1-ones
- Patent number 6,433,228
- Issue date Aug 13, 2002
- Bayer Aktiengesellschaft
- Joachim Komoschinski
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Method of preparing 4,5,6-trichloro-and 2,4,5,6-tetrachloropyrimidine
- Patent number 6,369,259
- Issue date Apr 9, 2002
- Bayer Aktiengesellschaft
- Guido Steffan
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Process for preparing 2-cyanoindan-1-ones
- Patent number 6,355,827
- Issue date Mar 12, 2002
- Bayer Aktiengesellschaft
- Joachim Komoschinski
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Process for the preparation of Grignard reagents and novel Grignard...
- Patent number 6,296,788
- Issue date Oct 2, 2001
- Bayer Aktiengesellschaft
- Guido Giffels
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Thermally-responsive record material
- Patent number 6,294,502
- Issue date Sep 25, 2001
- Bayer Aktiengesellschaft
- Mark Robert Fisher
- B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
Information Patent Grant
Method for the production of 2,6-dichloro-5-fluoronicotinonitrile a...
- Patent number 6,197,964
- Issue date Mar 6, 2001
- Bayer Aktiengesellschaft
- Andreas Sattler
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Method for preparing acetophenones with a fluoralkyl-substituted ar...
- Patent number 6,184,417
- Issue date Feb 6, 2001
- Bayer Aktiengesellschaft
- Wulf Kühnle
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Method of preparing 4,5,6-trichloro- and 2,4,5,6-tetrachloropyrimidine
- Patent number 6,162,917
- Issue date Dec 19, 2000
- Bayer Aktiengesellschaft
- Guido Steffan
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Process for the preparation of a nitropyrazole amide
- Patent number 6,025,499
- Issue date Feb 15, 2000
- Bayer Aktiengesellschaft
- Lutz Heuer
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Thermally-responsive record material
- Patent number 6,015,771
- Issue date Jan 18, 2000
- Bayer Aktiengesellschaft
- Mark Robert Fisher
- B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
Information Patent Grant
Process for the preparation of nitropyrazole esters
- Patent number 5,969,152
- Issue date Oct 19, 1999
- Bayer Aktiengesellschaft
- Lutz Heuer
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Process for the preparation of p-haloalkoxyanilines
- Patent number 5,900,509
- Issue date May 4, 1999
- Bayer Aktiengesellschaft
- Franz-Josef Mais
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Process for decarboxylation of halogenated aromatic carboxylic acids
- Patent number 5,872,283
- Issue date Feb 16, 1999
- Bayer Aktiengesellschaft
- Stefan Antons
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Process for the preparation of 2-amino-5-alkyl-phenols
- Patent number 5,847,217
- Issue date Dec 8, 1998
- Bayer Aktiengesellschaft
- Horst Behre
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Process for the free-radical chlorination or bromination of methyl...
- Patent number 5,723,613
- Issue date Mar 3, 1998
- Bayer Aktiengesellschaft
- Guido Steffan
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Process for the preparation of polychloropyrimidines
- Patent number 5,719,285
- Issue date Feb 17, 1998
- Bayer Aktiengesellschaft
- Guido Steffan
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
(2,3-dihydro-5-benzofuranyl)-acetonitrile
- Patent number 5,693,831
- Issue date Dec 2, 1997
- Bayer Aktiengesellschaft
- Nikolaus Muller
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Process for the preparation of substituted 2-fluoro-pyrimidines
- Patent number 5,681,957
- Issue date Oct 28, 1997
- Bayer Aktiengesellschaft
- Erich Wolters
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Process for the preparation of 2-chloroacrylonitrile
- Patent number 5,679,826
- Issue date Oct 21, 1997
- Bayer Aktiengesellschaft
- Franz-Josef Mais
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Process for the preparation of 4,6-dichloropyrimidines
- Patent number 5,677,453
- Issue date Oct 14, 1997
- Bayer Aktiengesellschaft
- Gunther Cramm
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Process for preparing weakly-basic anion exchangers and reagents su...
- Patent number 5,464,875
- Issue date Nov 7, 1995
- Bayer Aktiengesellschaft
- Reinhold Klipper
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information Patent Grant
Process for the preparation of 2-chloropyridines
- Patent number 5,283,338
- Issue date Feb 1, 1994
- Bayer Aktiengesellschaft
- Gunther Cramm
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Process for the preparation of aminoarylsulphonic acids
- Patent number 5,144,065
- Issue date Sep 1, 1992
- Bayer Aktiengesellschaft
- Guido Steffan
- C07 - ORGANIC CHEMISTRY

Guido Steffan

Person

Patents Grantslast 30 patents

Method for producing 4,6-dichloropyrimidine

Method for producing 4-chloro-6-hydroxypyrimidine

Method for producing 4,6-dichloropyrimidine with sulfur compounds a...

Process for converting nitrobenzene to a free aminophenol

Substituted cinnamic acids and cinnamic acid esters

Method of producing 4,6-dichloropyrimidine with acid chlorides

Method for the production of 4,6-dichloropyrimidine with the aid of...

Process for preparing 2-halogenated indan-1-ones

Method of preparing 4,5,6-trichloro-and 2,4,5,6-tetrachloropyrimidine

Process for preparing 2-cyanoindan-1-ones

Process for the preparation of Grignard reagents and novel Grignard...

Thermally-responsive record material

Method for the production of 2,6-dichloro-5-fluoronicotinonitrile a...

Method for preparing acetophenones with a fluoralkyl-substituted ar...

Method of preparing 4,5,6-trichloro- and 2,4,5,6-tetrachloropyrimidine

Process for the preparation of a nitropyrazole amide

Thermally-responsive record material

Process for the preparation of nitropyrazole esters

Process for the preparation of p-haloalkoxyanilines

Process for decarboxylation of halogenated aromatic carboxylic acids

Process for the preparation of 2-amino-5-alkyl-phenols

Process for the free-radical chlorination or bromination of methyl...

Process for the preparation of polychloropyrimidines

(2,3-dihydro-5-benzofuranyl)-acetonitrile

Process for the preparation of substituted 2-fluoro-pyrimidines

Process for the preparation of 2-chloroacrylonitrile

Process for the preparation of 4,6-dichloropyrimidines

Process for preparing weakly-basic anion exchangers and reagents su...

Process for the preparation of 2-chloropyridines

Process for the preparation of aminoarylsulphonic acids