Patent · US Expired

Quinophthalone dyestuffs

US3932419A · kind A · utility

1Cited by

1References

3Claims

0Family size

Assignee

BAYER HEALTHCARE LLC · DE

Inventors

Manfred Groll · Leverkusen, DE
Volker Hederich
Hans-Samuel Bien

Key dates

Filing date	May 25, 1973
Grant date	Jan 13, 1976
Priority date	—
Expiry date	May 25, 1993

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC09B25/00
WIPO fieldBasic materials chemistry
WIPO sectorChemistry

Abstract

Quinophthalone dyestuffs of the formula ##SPC1## In which Ac denotes an acyl radical, X denotes a non-ionic substituent, Y denotes hydrogen or halogen and n denotes a number from 0 to 3 as well as their production and their use for dyeing and printing organic materials.

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