Patents by Inventor Paolo Righi

Paolo Righi 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).

  • Polymorphous forms of rifaximin, processes for their production and use thereof in medicinal preparations
    Patent number: 7045620
    Abstract: Crystalline polymorphous forms of the rifaximin (INN) antibiotic named rifaximin ? and rifaximin ?, and a poorly crystalline form named rifaximin ? have been discovered. These forms are useful in the production of medicinal preparations for oral and topical use and can be obtained by means of a crystallization process carried out by hot-dissolving the raw rifaximin in ethyl alcohol and by causing the crystallization of the product by the addition of water at a determinate temperature and for a determinate period of time. The crystallization is followed by drying carried out under controlled conditions until a specific water content is reached in the end product.
    Type: Grant
    Filed: December 5, 2003
    Date of Patent: May 16, 2006
    Assignee: Alfa Wassermann, S.p.A.
    Inventors: Giuseppe C. Viscomi, Manuela Campana, Dario Braga, Donatella Confortini, Vincenzo Cannata, Denis Severini, Paolo Righi, Goffredo Rosini
  • Polymorphic forms of rifaximin, processes for their production and uses thereof
    Publication number: 20050272754
    Abstract: The present invention relates to rifaximin polymorphic forms ?, ? and ?, the processes for their preparation and the use thereof in the manufacture of medicinal preparations for the oral or topical route.
    Type: Application
    Filed: May 24, 2005
    Publication date: December 8, 2005
    Applicant: ALFA WASSERMANN S.p.A.
    Inventors: Giuseppe Viscomi, Manuela Campana, Dario Braga, Donatella Confortini, Vincenzo Cannata, Paolo Righi, Goffredo Rosini
  • Polymorphous forms of rifaximin, processes for their production and use thereof in medicinal preparations
    Publication number: 20050101598
    Abstract: Crystalline polymorphous forms of the rifaximin (INN) antibiotic named rifaximin ? and rifaximin ?, and a poorly crystalline form named rifaximin ? have been discovered. These forms are useful in the production of medicinal preparations for oral and topical use and can be obtained by means of a crystallization process carried out by hot-dissolving the raw rifaximin in ethyl alcohol and by causing the crystallization of the product by the addition of water at a determinate temperature and for a determinate period of time. The crystallization is followed by drying carried out under controlled conditions until a specific water content is reached in the end product.
    Type: Application
    Filed: December 5, 2003
    Publication date: May 12, 2005
    Applicant: ALFA WASSERMANN S.p.A.
    Inventors: Giuseppe Viscomi, Manuela Campana, Dario Braga, Donatella Confortini, Vincenzo Cannata, Denis Severini, Paolo Righi, Goffredo Rosini