Inventor

Wilfried Sahm

Inventor

Kelkheim, DE

Overview

12→

Patents

1976–1979

Patent span

Chemistry

Primary field (CPC C)

Patents· 12 as inventor

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

C07Dprimary

C07DHeterocyclic compounds52%

C07FAcyclic, carbocyclic or heterocyclic compounds containing elements other than carbon, hydrogen, halogen, oxygen, nitrogen, sulfur, selenium or tellurium14%

C11DDetergent compositions14%

C07CAcyclic or carbocyclic compounds5%

C09BOrganic dyes or closely-related compounds for producing dyes, e.g. pigments5%

D06LDry-cleaning, washing or bleaching fibres, filaments, threads, yarns, fabrics, feathers or made-up fibrous goods5%

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

PatentTitleYear

4,153,798'Process for the manufacture of 5-acetoacetylamino-benzimidazolone'1979 4,122,256'Heterocyclic azomethines'1978 4,087,610'Process for the preparation of 5-acetoacetylamino-benzimidazolone'1978 4,052,433'Aromatic azomethines'1977 4,039,555'Benzofuran derivatives, process for preparing them and their use as optical brighteners'1977 4,002,423'Benzofuran derivatives process for their preparation and their use as optical brighteners'1977 4,001,130'Optical brighteners'1977 3,994,879'Process for the preparation of benzofuran compounds'1976 3,974,172'Benzofuran derivatives'1976 3,972,877'Butadiene derivatives, process for their preparation and their use as optical brighteners'1976 3,940,340'Peracylated polyamines compatible with optical brighteners as activators for inorganic peroxo compounds'1976 3,931,215'Benzofuran derivatives'1976

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1976–1979Patents assigned to HOECHST AG (12)· patent assignee history

1976–1979Based in Kelkheim, DE· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
HOECHST AG	12	1976–1979

Locations

Location	Patents	Span
Kelkheim, DE	12	1976–1979