Patent · US Expired

Bisazo dyestuffs based on hydroxynaphthalene carboxylic acid

US6933371B2 · kind B2 · utility

6Cited by

3References

4Claims

0Family size

Assignee

BASF SE

Inventors

Gunter Schroder · Minden, DE
Sophia Ebert · Mannheim, DE
Karl-Heinz Etzbach · Bischofswerda, DE
Rainer Tresch · Frankenthal (Pfalz), DE
Rudiger Sens · Ludwigshafen, DE

Key dates

Filing date	Sep 13, 2001
Grant date	Aug 23, 2005
Priority date	—
Expiry date	Aug 9, 2022

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10S8/92
WIPO fieldBasic materials chemistry
WIPO sectorChemistry

Abstract

Disclosed are bisazo compounds of the formula Ia or Ib

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.