Patents by Inventor Alessandro Lesignoli

Alessandro Lesignoli 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 preparation of 4-carboxy-5, 8,11-tris (carboxymethyl)-phenyl-2-oxa-5, 8 11-triazatridecan
    Patent number: 6162947
    Abstract: A novel a process for the preparation of the chelating agent of formula (I) ##STR1## 4-carboxy-5,8,11-tris(carboxymethyl)-1-phenyl-2-oxa-5,8,11-triazatridecan- 13-oic acid, commonly named BOPTA.
    Type: Grant
    Filed: July 8, 1999
    Date of Patent: December 19, 2000
    Assignee: Dibra S.p.A.
    Inventors: Marina Ausonio, Carlo Distaso, Giuseppe Gerardo Elia, Alessandro Lesignoli, Rodolfo Piva, Carlo Secchi, Carlo Felice Viscardi