Azo dyes

Organic compounds -- part of the class 532-570 series – Organic compounds – Azo

Reexamination Certificate

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Details

C534S850000, C534S854000, C534S855000, C008S528000, C008S639000, C008S693000, C008S696000, C008S922000, C106S031290, C106S031510

Reexamination Certificate

active

07101983

ABSTRACT:
The present invention relates to novel dyestuffs of formula (I)wherein the substituents have the meanings defined in the claims, the production of such dyestuffs, the use of these dyestuffs and material dyed or printed by such dyestuffs.

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patent: WO 91/09842 (1991-07-01), None
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Draganov, Al., “Preparation of N-omega-Cyanmetyl-N-beta-oxyethylaniline and Its Use as a Azocomponent in the Synthesis of Disperse Dyes”, God. Visch. Khimikoteknol., vol. 15—Sofia, No. 4, 1968, pp. 67-71. (English abstract attached to article.).
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Hoyer E et al: “Sterlsche Hinderung bel stark polaren 2, 6-disubstituierten Azobenzolen” Angewandte Chemie, VCH Verlagsgesellschaft, Weinheim, DE, vol. 85, No. 22, 1973, pp. 984-985, XP002129890 ISS N 0044-8249.
Johri S et al: “Synthesis of Some New Disperse Dyes” Journal of the Indian Chemical Society, the Indian Chemical Society, Calcutta, IN, vol.73, Nov. 1, 1996 (Nov. 1,1996), pp. 629-630, XP000671619 ISSN: 0019-4522.
PCT Preliminary Examination Report for application No. PCT/IB 02/01118, mail date of May 9, 2003.
PCT Search Report for application No. PCT/IB 02/01118, mall date of Jul. 1, 2002.

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