Patents by Inventor Ugo Marangelli

Ugo Marangelli has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Concentrated coloring solutions of a blue tinge based on mixture of 1.4-dialkyl-anthraquinones for the coloring of petroliferous products
    Patent number: 4303407
    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.
    Type: Grant
    Filed: May 21, 1980
    Date of Patent: December 1, 1981
    Assignee: Aziende Colori Nazionali Affini ACNA S.p.A.
    Inventors: Ugo Marangelli, Giancarlo Ciocci, Sisto S. Papa