Patents by Inventor Ermanno Gaetani

Ermanno Gaetani 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).

  • Trisazo dyes containing two different aminonaphtholsulphonic acid coupler components
    Patent number: 4052380
    Abstract: New direct dyes which can be diazotized on fibers and have the general formula ##STR1## are disclosed. In the formula, A and B, which are different from each other, are amino-naphtholsulphonic acids. A process for making the new dyes by coupling one mole of a tetrazo derivative of 4,4-diamino-azobenzol with a mixture containing substantially one mole of the amino-naphtholsulphonic acid A and one mole of the different amino-naphtholsulphonic acid B, in an alkaline medium, is also enclosed.
    Type: Grant
    Filed: April 11, 1975
    Date of Patent: October 4, 1977
    Assignee: Aziende Colori Nazionali Affini ACNA S.p.A.
    Inventors: Ermanno Gaetani, Sandro Ponzini