Inventor

Rudiger Erckel

Inventor

Eppstein, DE

Overview

20→

Patents

1977–1988

Patent span

Chemistry

Primary field (CPC C)

Patents· 20 as inventor

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

C07Dprimary

C07DHeterocyclic compounds37%

D06LDry-cleaning, washing or bleaching fibres, filaments, threads, yarns, fabrics, feathers or made-up fibrous goods22%

C13KSaccharides obtained from natural sources or by hydrolysis of naturally occurring disaccharides, oligosaccharides or polysaccharides11%

C07FAcyclic, carbocyclic or heterocyclic compounds containing elements other than carbon, hydrogen, halogen, oxygen, nitrogen, sulfur, selenium or tellurium7%

C09BOrganic dyes or closely-related compounds for producing dyes, e.g. pigments7%

A23GCocoa4%

A23LFoods, foodstuffs or non-alcoholic beverages, not otherwise provided for4%

C08BPolysaccharides4%

Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests4%

PatentTitleYear

4,766,207'Process for the preparation of water-soluble polysaccharides, the saccharides thus obtainable, and their use'1988 4,589,924'Process for hydrolyzing cellulose-containing material with gaseous hydrogen fluoride'1986 4,578,469'Benzo[de]pyrano[3,2-g]isoquinoline derivatives useful as dyestuffs'1986 4,556,432'Process for hydrolyzing cellulose-containing material with gaseous hydrogen fluoride'1985 4,556,431'Process for hydrolyzing cellulose-containing material with gaseous hydrogen fluoride'1985 4,363,744'Mixtures of optical brighteners and their use for the optical brightening'1982 4,336,155'Mixtures of optical brighteners'1982 4,332,943'Process for the preparation of pyridine'1982 4,330,427'Mixtures of optical brighteners'1982 4,323,675'Novel stilbene compounds: process for their manufacture and their use as optical brighteners'1982 4,310,665'Novel stilbene compounds and process for the manufacture thereof'1982 4,282,355'Process for the manufacture of bis-benzoxazolyl-stilbene compounds'1981 4,231,741'Mixtures of optical brighteners'1980 4,220,760'Diamino-1,3,5-triazinylstilbene compounds and process for preparing same'1980 4,219,651'Benzimidazo-[1,2-a]-quinolines'1980 4,197,401'Stilbenes, process for the manufacture thereof and the use thereof as optical brighteners'1980 4,169,810'Mixtures of optical brighteners'1979 4,142,044'4-Benzoxazolyl-4\'-oxadiazolyl stilbene optical brighteners'1979 4,129,412'Brightener mixtures and their use'1978 4,039,531'4-Stilbenyl-1,2,3-triazoles, process for preparing them and their use as optical brighteners'1977

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1977–1988Patents assigned to HOECHST AG (20)· patent assignee history

1977Based in Kelkheim, DE· patent location history

1978–1980Based in Hofheim, DE· patent location history

1980–1986Based in Eppstein, DE· patent location history

1988Based in Coventry, RI, US· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
HOECHST AG	20	1977–1988

Locations

Location	Patents	Span
Eppstein, DE	13	1980–1986
Hofheim, DE	5	1978–1980
Coventry, RI, US	1	1988
Kelkheim, DE	1	1977