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:
Dec. 01, 1981
Filed:
May. 21, 1980
Applicant:
Inventors:
Assignee:
Aziende Colori Nazionali Affini ACNA S.p.A., Milan, IT;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C09B / ; C07C / ;
U.S. Cl.
CPC ...
8643 ; 260378 ; 8521 ;
Abstract
The present invention relates to concentrated solutions in organic solvents of special mixtures of 1-4-dialkyl-amino-anthraquinone dyes particularly useful for the coloring of hydrocarbons. The solutions of this invention are particularly useful for the coloring of hydrocarbons obtained by distillation of crude oil such, for example, as petrol kerosene and gas oil. The invention also includes the preparation of the aforementioned concentrated solutions, including direct preparation of the solutions during the synthesis phase of the anthraquinone dyes.