The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 25, 1980
Filed:
Aug. 23, 1978
Hermann Fuchs, Kelkheim, DE;
Klaus Filzinger, Hofheim, DE;
Hoechst Aktiengesellschaft, Frankfurt am Main, DE;
Abstract
Water-soluble disazodyestuffs of the formula ##STR1## in which R.sub.1 and R.sub.2 are identical or different and each is hydrogen, methyl, ethyl or methoxy, and R.sub.3 is hydrogen, chlorine, nitro or alkyl of 1 to 4 carbon atoms, and their salts have been found which possess very good dyeing characteristics and are very well suitable for dyeing of synthetic polyamides and yield dyeings on these fibers with good to very good wet fastnesses and fastnesses to processing and to use. In accordance with this, an improved process had been found for coloring synthetic polyamide fibres by applying the above dyestuffs of the invention on said fibres in usual dyeing and printing methods and fixing them on the fibre by methods as usual in the art.