Patents by Inventor Placido Bertin

Placido Bertin 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).

  • Resolution process of intermediates useful for the preparation of diltiazem
    Patent number: 5097059
    Abstract: A process of spontaneous resolution of compounds of formula ##STR1## wherein R has the meanings reported in the description, is described. The compounds of formula III are intermediates useful for the preparation of Diltiazem.
    Type: Grant
    Filed: July 26, 1990
    Date of Patent: March 17, 1992
    Assignee: Zambon Group S.p.A.
    Inventors: Claudio Giordano, Dario Tentorio, Roberto Casagrande, Placido Bertin, Valeriano Merli, Giorgio Sagramora