Patents by Inventor Umberto Constantino

Umberto Constantino 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).

  • Zirconium phosphate and method for its preparation
    Patent number: 4826663
    Abstract: The invention relates to a zirconium phosphate in particles having sizes comprised within the range of from 1 to 100 .mu.m, a lamellar structure with interlayer distance, in the anhydrous state, comprised within the range of from 7.9 to 8.2 .ANG. and a surface area comprised within the range of from 9 to 20 m.sup.2 /g.The method consists in altering the lamellar structure of a zirconium phosphate with layer structure of alpha type by intercalating into it an organic substance containing a proton-acceptor group and water and by a treatment with ultrasounds, in regenerating the hydrogen form of said zirconium phosphate by an acid and in washing the same with diluted acids and/or water.
    Type: Grant
    Filed: May 13, 1986
    Date of Patent: May 2, 1989
    Assignee: Eniricerche S.p.A.
    Inventors: Giulio Alberti, Francesco Bartoli, Umberto Constantino, Francesco Di Gregorio, Claudio Valentini