LexDanaLexDanabeta
Inventor

Wolf-Eckhard Bleck

Inventor
Leverkusen, DE

Overview

3→
Patents
1976–1978
Patent span
Chemistry
Primary field (CPC C)

Patents· 3 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. pigments75%
D06LDry-cleaning, washing or bleaching fibres, filaments, threads, yarns, fabrics, feathers or made-up fibrous goods25%
PatentTitleYear
4,087,245'Process for the preparation of concentrated solutions of anionic dyestuffs'19784,077,767'Process for the preparation of concentrated solutions of urea compounds'19783,966,703'Asymmetrical frisazo dyestuffs derived from diazotized 2,7-diamino-carbazole'1976

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1976–1978Patents assigned to BAYER AG (3)· patent assignee history
1976–1978Based in Leverkusen, DE· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
BAYER AG31976–1978
Locations
LocationPatentsSpan
Leverkusen, DE31976–1978