logo

For the Inventor, By the Inventor

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.:

US 4303407 B1

PDFFull Text
Date of Patent:
Dec. 01, 1981

Filed:

May. 21, 1980

Concentrated coloring solutions of a blue tinge based on mixture of

Applicant:
Inventors:

Ugo Marangelli, Saronno, IT;

Giancarlo Ciocci, Saronno, IT;

Sisto S Papa, Milan, IT;

Assignee:

Aziende Colori Nazionali Affini ACNA S.p.A., Milan, IT;

Attorney:

Morgan, Finnegan, Pine, Foley & Lee

Primary Examiner:

Winston A Douglas

Assistant Examiner:

Raymond K Covington

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.

Find Patent Forward Citations

Marangelli, Ugo. (1981). Concentrated coloring solutions of a blue tinge based on mixture of (U.S. Patent No. 4303407). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4303407

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

Loading…