Inventor

Winfried Orth

Inventor

Hassloch, DE

Overview

25→

Patents

1976–1995

Patent span

Chemistry

Primary field (CPC C)

Patents· 25 as inventor

Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.

C07Dprimary

C07DHeterocyclic compounds58%

C07CAcyclic or carbocyclic compounds19%

A61KPreparations for medical, dental or toiletry purposes6%

A61PSpecific therapeutic activity of chemical compounds or medicinal preparations6%

A61QSpecific use of cosmetics or similar toiletry preparations6%

Y02PClimate change mitigation technologies in the production or processing of goods3%

PatentTitleYear

5,380,862'Preparation of isomer-free 2,5-dichloro-pyridine'1995 5,169,990'Preparation of 9,9-bis-(4-hydroxyphenyl)-fluorene'1992 5,149,886'Preparation of 9,9-bis-(4-hydroxyphenyl)-fluorene'1992 5,082,944'Production of pyridine-3-sulfonic acid'1992 5,066,806'Novel separation process'1991 4,942,239'Process for the production of 2-hydroxypyridine'1990 4,925,942'Preparation of quinuclidine-3-methanol'1990 4,865,620'Hair dye composition'1989 4,785,110'Process for the production of 2-amino-3-nitro-6-(4-fluorobenzylamino)-pyridine'1988 4,719,298'Side chain chlorination process of heterocycles'1988 4,659,846'Preparation of 2,5-diloweralkyl-1.4:3,6-dianhydrosorbitols'1987 4,582,910'Method for preparation of 4-halogenonaphthalic acid anhydrides'1986 4,567,272'Pyrrole containing 2-aminonitropyridine derivatives'1986 4,564,700'Process for the preparation of fluorene-9-carboxylic acid'1986 4,549,024'Oxidation of quinoline to quinolinic acid'1985 4,546,190'Method for producing 3,5,6-trichloro-1H-pyridine-2-on'1985 4,529,800'Novel process for the preparation of 2-halo-3-nitro-6-alkoxy-pyridines'1985 4,510,090'Method for the production of phenanthrenequinone'1985 4,493,935'Preparation of 1H-pyrrol-2-acetic acid esters'1985 4,377,699'5-Chloro-indole preparation'1983 4,357,277'Novel process for the preparation of N,N\'-bisacyl hydrazides'1982 4,332,728'Process for the preparation of bisacyl hydrazines'1982 4,256,892'Preparation of bis-2-pyridyl-disulfides'1981 4,228,083'Process for the production of .beta.-(5-nitro-2-furyl)-acrolein'1980 3,954,891'Method of making substituted hydroquinones'1976

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1976–1995Patents assigned to RUETGERSWERKE AG (24)· patent assignee history

1976Based in Hasloch, DE· patent location history

1980–1995Based in Hassloch, DE· patent location history

1982–1992Based in Hassloch/Pfalz, DE· patent location history

1988Patents assigned to DEGUSSA (1)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
RUETGERSWERKE AG	24	1976–1995
DEGUSSA	1	1988

Locations

Location	Patents	Span
Hassloch, DE	17	1980–1995
Hassloch/Pfalz, DE	7	1982–1992
Hasloch, DE	1	1976