Inventor

STEFFAN GUIDO

DE40 patents

⚠️ This page may combine multiple inventors who share the name “STEFFAN GUIDO”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

STEFFAN GUIDO

BAYER AG

Process for preparing 2-cyanoindan-1-ones

Process for the preparation of substituted 2-fluoro-pyrimidines

Process for the preparation of polychloropyrimidines

Substituted cinnamic acids and cinnamic acid esters

Process for the preparation of Grignard reagents and novel Grignard reagents

Process for preparing weakly-basic anion exchangers and reagents suitable for this purpose

Process for the preparation of 2-chloropyridines

Thermally-responsive record material

Process for the preparation of 4,6-dichloropyrimidines

Process for the preparation of 1-amino-8-naphthol-3,6-disulphonic acid (H-acid)

Process for removing heavy metal sulphides from aqueous systems

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

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

Preparation of 2-chlorobenzthiazole

Method for producing 4-chloro-6-hydroxypyrimidine

Method for producing 4,6-dichloropyrimidine with sulfur compounds and phosphorus compounds

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

Process for preparing 2-halogenated indan-1-ones

Process for the preparation of oxalyl chloride

Thermally-responsive record material

Process for the preparation of 2-chloroacrylonitrile

Process for preparing 3,5-dichloro-α-methylstyrene

Method for preparing acetophenones with a fluoralkyl-substituted aromatic nucleus

Process for the preparation of 1,2,4-triazole

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

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

Process for the preparation of aminonaphthalenesulphonic acids

Method for producing 4,6-dichloropyrimidine

Process for converting nitrobenzene to a free aminophenol

Process for the preparation of a nitropyrazole amide

Process for the preparation of nitropyrazole esters

Process for the free-radical chlorination or bromination of methyl aromatic compounds

Process for the preparation of aminoarylsulphonic acids

Process for the preparation of naphthalene-1,3,6-trisulphonic acid

Method for the production of 2,6-dichloro-5-fluoronicotinonitrile and the chemical compound 3-cyano-2-hydroxy-5-fluoropyride-6-one-monosodium salt its tautomers

BAYER AKITNEGESELLSCHAFT

Method of producing 4,6-dichloropyrimidine with acid chlorides

KRAMER AG

Sulphonation products of naphthalene, processes for their preparation, and their use

CIBA GEIGY AG

Process for producing the magnesium salt of 3-nitro-naphthalene-1,5-disulfonic acid (nitro-Armstrong&#39;s acid)

Process for producing the magnesium salt of 3-nitro-naphthalene-1,5-disulfonic acid (nitro-Armstrong's acid)