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:
Aug. 16, 1977
Filed:
Jun. 10, 1975
Aime Joseph Arsac, Condrieu, FR;
Pierre Frank, Saint Clair du Rhone, FR;
Produits Chimiques Ugine Kuhlmann, Paris, FR;
Abstract
Liquid dyestuffs of the general formula: ##STR1## in which y represents 0 or 1, x and z each represent a whole number in which the sum x + y + z is a whole number from 5 to 17; a process for the preparation of such dyestuffs in which the bis-diazo derivative of bis-(4-amino-phenyl)-sulphide is coupled in aqueous medium with a 2-N-alkylamino-naphthalene of the formula: ##STR2## x, y and z having the same significance as above, in the proportion of two molecules of naphthalene derivative to one molecule of bis-diazo derivative; and the use of these dyestuffs for the coloration of petroleum products, inks, fats, waxes and plastics materials.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile