Inventor
Karl-Heinrich Lange
Inventor
Leverkusen, DE
Overview
Patents· 6 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. pigments46%
C07DHeterocyclic compounds31%
Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests15%
D06PDyeing or printing textiles8%
PatentTitleYear
5,725,607'Method for reducing the toxicity of spent liquors and novel cationic dyes'19985,578,711'Process for the preparation of dyestuffs'19965,541,299'Process for the preparation of dyestuffs'19965,502,171'Process for the preparation of dyestuffs'19965,436,323'Cationic 1,3,4-thiadiazole dyestuffs'19955,328,993'Cationic triazatrimethine dyestuffs'1994Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1994–1998Patents assigned to BAYER AG (6)· patent assignee history
1994–1995Based in Burscheid, DE· patent location history
1996Based in Leverkusen, DE· patent location history
1998Based in Fukuoka, JP· patent location history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| BAYER AG | 6 | 1994–1998 |
Locations
| Location | Patents | Span |
|---|---|---|
| Leverkusen, DE | 3 | 1996 |
| Burscheid, DE | 2 | 1994–1995 |
| Fukuoka, JP | 1 | 1998 |