Patents by Inventor Carlo Secchi

Carlo Secchi 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
  • Process for the preparation of 5H, 9bH-2a, 4a, 7, 9a-octahydro-tetraazacycloocta?cd!pentalene
    Patent number: 5925753
    Abstract: A process for the preparation of 5H,9bH-2a,4a,7, 9a-octahydrotetraazacycloocta?cd!pentalene of formula (I) ##STR1## which comprises the reaction of 1,4,7,10-tetraazacyclododecane with triethyl orthoformate in the absence of solvent and in the presence of an acid catalyst.
    Type: Grant
    Filed: June 10, 1998
    Date of Patent: July 20, 1999
    Assignee: Dibra S.p.A.
    Inventors: Carlo Felice Viscardi, Marina Ausonio, Massimo Gagna, Carlo Secchi