Inventor

Wolfgang Tronich

Inventor

Eppstein, DE

Overview

1976–1996

Patent span

Chemistry

Primary field (CPC C)

Patents· 17 as inventor

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

C07Cprimary

C07CAcyclic or carbocyclic compounds52%

C07DHeterocyclic compounds19%

C09BOrganic dyes or closely-related compounds for producing dyes, e.g. pigments19%

Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests5%

Y10TTechnical subjects covered by former us classification5%

PatentTitleYear

5,559,257'Process for the preparation of tetrachloro-1,4-benzoquinone'1996 5,539,114'Process for the preparation of substituted quinazoline-2,4,-diones'1996 5,446,190'Process for the preparation of alkyl fluorobenzoates in high purity and high yield'1995 5,292,932'Process for the preparation of 5-chloro-2-hydroxy-4-alkyl-benzenesulfonic acids'1994 5,136,043'Process for the preparation of aromatic sulfonyl chlorides'1992 4,990,673'Process for the preparation of 4,4\'-dinitrodiphenylamine'1991 4,552,970'Solvated salts of dinitrophenylcyanamides, and a process for the preparation thereof'1985 4,507,491'Process for preparing 1-nitrobenzene-2-alkyloxycarbonyl-5-carboxylic acids'1985 4,410,707'Process for the manufacture of 3-amino-1-phenylpyrazol-5-one'1983 4,316,861'N-Nitroaryl-N-halosulfonyl ureas'1982 4,254,054'Process for the manufacture of 4-nitro-4\'-amino-diphenylamine-2-sulfonic acid and 2-nitro-4\'-amino-diphenylamine-4-sulfonic acid'1981 4,246,196'Diaminophenyl ureas'1981 4,224,222'Process for preparing copper phthalocyanine pigments of the .alpha.-modification'1980 4,169,851'Process for the manufacture of acetoacetyl-aminobenzenes'1979 4,018,791'Process for the preparation of highly pure halogenated phthalocyanine pigment'1977 4,010,180'Process for the purification of copper phthalocyanine'1977 3,984,433'Process for preparing copper phthalocyanine pigments of the .alpha.-modification'1976

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1976–1996Patents assigned to HOECHST AG (17)· patent assignee history

1976–1980Based in Frankfurt am Main, DE· patent location history

1979–1982Based in Hofheim, DE· patent location history

1983–1996Based in Eppstein, DE· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
HOECHST AG	17	1976–1996

Locations

Location	Patents	Span
Eppstein, DE	9	1983–1996
Hofheim, DE	4	1979–1982
Frankfurt am Main, DE	4	1976–1980