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:
Jan. 10, 1978
Filed:
Dec. 03, 1976
Kevin Lawson Birkett, Manchester, EN;
John Alexander Bone, Manchester, EN;
Denis Robert Ridyard, Manchester, EN;
Imperial Chemical Industries Limited, London, EN;
Abstract
Water-soluble azo dye which, in the form of the free acid, has the formula ##STR1## WHEREIN A represents lower alkyl, hydroxy lower alkyl or phenyl and R represents hydrogen, lower alkyl or hydroxy lower alkyl and A, when phenyl, and ring B is unsubstituted or substituted by nitro, alkyl or alkoxy, m has a value of 0 or 1 and E represents a residue selected from: ##STR2## wherein R.sup.5 represents hydrogen, lower alkyl, hydroxy lower alkyl or benzyl, R.sup.6 represents lower alkyl or hydroxy lower alkyl and R.sup.7 and R.sup.8 each independently represent hydrogen, lower alkyl, lower alkoxy or acetylamino; and ##STR3## WHEREIN R.sup.9 represents lower alkyl, hydroxy lower alkyl, sulphato lower alkyl, phenyl or phenyl substituted by lower alkyl, lower alkoxy or hydroxy and p has a value of 0 or 1 with the proviso that there are no more than two sulpho groups in said dye. The dye is useful to color natural and synthetic polyamide textile materials.