Inventor

ORTH WINFRIED

25 patents

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

ORTH WINFRIED

RUETGERSWERKE AG

Preparation of 2,5-diloweralkyl-1.4:3,6-dianhydrosorbitols

Pyrrole containing 2-aminonitropyridine derivatives

5-Chloro-indole preparation

Method for producing 3,5,6-trichloro-1H-pyridine-2-on

Novel process for the preparation of 2-halo-3-nitro-6-alkoxy-pyridines

Preparation of 9,9-bis-(4-hydroxyphenyl)-fluorene

Preparation of 9,9-bis-(4-hydroxyphenyl)-fluorene

Novel separation process

Method for preparation of 4-halogenonaphthalic acid anhydrides

Oxidation of quinoline to quinolinic acid

Method of making substituted hydroquinones

Preparation of isomer-free 2,5-dichloro-pyridine

Production of pyridine-3-sulfonic acid

Process for the production of 2-hydroxypyridine

Side chain chlorination process of heterocycles

Method for the production of phenanthrenequinone

Hair dye composition

Process for the preparation of fluorene-9-carboxylic acid

Preparation of bis-2-pyridyl-disulfides

Process for the production of β-(5-nitro-2-furyl)-acrolein

Preparation of quinuclidine-3-methanol

Novel process for the preparation of N,N&#39;-bisacyl hydrazides

Process for the preparation of bisacyl hydrazines

Preparation of 1H-pyrrol-2-acetic acid esters

DEGUSSA

Process for the production of 2-amino-3-nitro-6-(4-fluorobenzylamino)-pyridine

Novel process for the preparation of N,N'-bisacyl hydrazides