Patents by Inventor Piero D. Croce

Piero D. Croce 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).

  • Process for the joint production of aromatic amines and iron oxide pigments
    Patent number: 4145228
    Abstract: Aromatic amines and iron oxide pigment are produced by reacting a ferrous salt, a reduceable aromatic nitrogen compound chosen from nitroderivatives with a single nitro-group or with two nitro-groups and azoderivatives, and a basic compound, chosen from hydroxides and carbonates of ammonium, alkali metals and alkaline earth metals, operating at 25.degree.-200.degree. C. in an aqueous medium. The color of the pigment can be varied from yellow to black by increasing the reaction temperature and the molar ratio between ferrous salt and aromatic nitrogen compound.
    Type: Grant
    Filed: November 17, 1977
    Date of Patent: March 20, 1979
    Assignee: Euteco S.p.A.
    Inventors: Piero D. Croce, Tullio Pellizzon, Peter Schwarz, Luigi Piccolo