Mono- and bis-hydrazone pigments

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

Reexamination Certificate

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C548S519000

Reexamination Certificate

active

07148335

ABSTRACT:
Mono- and Bis-Azo/Hydrazone Pyrrole Pigments and Methods for preparing same.

REFERENCES:
patent: 4460768 (1984-07-01), Iqbal et al.
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patent: 509646 (1954-02-01), None
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patent: WO 01/74950 (2001-10-01), None
El-Kousy et al., Chemical Abstracts, 123:198688, 1995.
Mumm; Muenchmeyer: “Phenyllydrazone of Phenyl-Kiketo-Pyrroline”:; Chemische Berichte; 1910; vol. 43 p. 3358.
El-Kousy et al.; A Study on Rearrangement of Arylazo Furanones and Pyrrolinones:: Oct. 9, 1995, vol. 123, No. 15; p. 1236 col. 2, Chemical Abstracts.
L. Capuano; P. Morsdorf; “Chemie Der 2,3-Dihydro-2,3,-Diiminofurnane”; Jul. 30, 1982; Liebigs Annalen Der Chemie; vol. 12, pp. 2178-2188.
F. Lavren et al.; Reactivity and Microbiological Activity of 2-Methyl-3-Carboethoxy-5-Pyrrolinone Derivatives; 1992; vol. 47, pp. 773-776, Pharmazie.
G. Kollenz; Synthesis of Heterocyclical Compounds; 1971; Monatshefte Chemie; vol. 102; No. 1, pp. 108-113.

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