Inventor
Wolf Weidemuller
Inventor
Frankfurt am Main, DE
Overview
Patents· 4 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
C09Bprimary
C09BOrganic dyes or closely-related compounds for producing dyes, e.g. pigments57%
C07DHeterocyclic compounds29%
D06PDyeing or printing textiles14%
PatentTitleYear
4,795,807'Preparation of azo dyestuffs by diazotization and coupling in the presence of an ester'19894,360,459'Sulphur dyestuffs of the carbazole series'19824,320,060'Process for the preparation of derivatives of 3-(4-hydroxy-anilino)carbazole'19824,309,178'Process for isolating sulphur dyestuffs from aqueous crude melts containing sodium polysulphide'1982Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1982–1989Patents assigned to CASSELLA FARBWERKE MAINKUR AG (4)· patent assignee history
1982–1989Based in Frankfurt am Main, DE· patent location history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| CASSELLA FARBWERKE MAINKUR AG | 4 | 1982–1989 |
Locations
| Location | Patents | Span |
|---|---|---|
| Frankfurt am Main, DE | 4 | 1982–1989 |