Patent · US Expired

Halogenated aromatic amines which are stable in color, and a process for their preparation

US4350573A · kind A · utility

2Cited by

1References

14Claims

0Family size

Assignee

BAYER HEALTHCARE LLC · DE

Inventors

Helmuth Kritzler
Walter Bohm · Leverkusen, DE
Ulrich Kappler · Langenfeld, DE
Hans D. Winkelmann · Charleston, US

Key dates

Filing date	Oct 27, 1980
Grant date	Sep 21, 1982
Priority date	—
Expiry date	Oct 27, 2000

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07C209/86
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

Halogenated aromatic amines are rendered colorstable by distillation and/or storing in equipment made of a rustproof material such as a Cr/Ni/Mo steel, tin, zinc, enamel, glass and/or ceramic material.

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