Inventor
Werner Steinbeck
Inventor
Cologne, 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. pigments60%
C07CAcyclic or carbocyclic compounds20%
Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests20%
PatentTitleYear
5,078,794'Process for preparing 4,4\'-diamino-1,1\'-dianthraquinonyl pigments'19924,969,954'Process for preparing 4,4\'-diamino-1,1\'-dianthraquinonyl pigments'19904,783,195'Process for the preparation of a concentrated aqueous reactive dyestuff solution: triphenyl-dioxazine dyes, lithium salts'19884,342,701'Process for the preparation of 4,5-dinitro-1,8-dihydroxyanthraquinone'1982Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1982–1992Patents assigned to BAYER AG (4)· patent assignee history
1982–1990Based in Cologne, DE· patent location history
1988Based in Leverkusen, DE· patent location history
1992Based in Bayerwerk, DE· patent location history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| BAYER AG | 4 | 1982–1992 |
Locations
| Location | Patents | Span |
|---|---|---|
| Cologne, DE | 2 | 1982–1990 |
| Bayerwerk, DE | 1 | 1992 |
| Leverkusen, DE | 1 | 1988 |