Patent · US Expired

Naphtholactam dyestuffs

US4001253A · kind A · utility

1Cited by

3References

6Claims

0Family size

Assignee

BAYER HEALTHCARE LLC · DE

Inventors

Horst Harnisch
Alfred Brack · Odenthal, DE

Key dates

Filing date	Aug 21, 1975
Grant date	Jan 4, 1977
Priority date	—
Expiry date	Aug 21, 1995

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC09B62/046
WIPO fieldBasic materials chemistry
WIPO sectorChemistry

Abstract

Naphtholactam dyestuffs of the formula ##STR1## wherein A represents the remaining members of an aromatic ring system and R represents hydrogen, alkyl, aralkyl, cycloalkyl, alkyl, aryl or an alkylene radical bonded to the naphthalene ring in the 2-position, as well as their preparation and their use for dyeing and printing natural and synthetic materials.

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