Patents by Inventor Davide Renier

Davide Renier 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).

  • Cross-linked derivatives of hyaluronic acid
    Patent number: 7125860
    Abstract: The present invention describes a new class of cross-linked derivatives of partially N-deacetylated hyaluronic acid or derivatives thereof, comprising at least one repeating unit of formula (I) hereinafter depicted and a process for the preparation of said cross-linked derivatives, comprising a multicomponent condensation reaction involving the carboxy groups and the amino groups originating from a partial N-deacetylation of hyaluronic acid or derivatives, together with an aldeyde and an isocyanide. The derivatives thus obtained can be used, alone or in association with biologically and/or pharmacologically active substances, for the preparation of pharmaceutical compositions, biomaterials, surgical and healthcare articles, slow release systems and for the coating of biomedical objects.
    Type: Grant
    Filed: August 31, 2001
    Date of Patent: October 24, 2006
    Assignee: Fidia Farmaceutici S.p.A.
    Inventors: Davide Renier, Vittorio Crescenzi, Andrea Francescangeli
  • Electrically conductive polymeric biomaterials, the process for their preparation and the use thereof in the biomedical and healthcare field
    Publication number: 20040131651
    Abstract: The present invention concerns the preparation of composite biomaterials constituted by hyaluronic acid and the derivatives thereof in combination with polymers that have electrically conductive properties. In particular, the methods of preparing biomedical devices formed by a two- or three-dimensional polysaccharide matrix and by an electrically conductive membrane. The matrix is constituted by hyaluronic acid derivatives in the form of membranes, woven fabrics, nonwoven felts, meshes, gauzes, guide channels or sponges, while the electrically conductive membrane is constituted by a film of polypyrrole (polymer conductor) in combination with hyaluronic acid or a derivative thereof (doping agent).
    Type: Application
    Filed: February 6, 2004
    Publication date: July 8, 2004
    Inventors: Stefania Panero, Gianluca Abbati, Davide Renier, Vittorio Crescenzi
  • Process for preparing a hyaluronic acid fraction having a low polydispersion index
    Patent number: 6232303
    Abstract: A process for preparing a hyaluronic acid fraction having an average molecular weight comprised between 5000 and 300,000 and a polydispersion index lower than 1.7, comprising treating the starting high molecular weight hyaluronic acid, contemporaneously with sodium hypochlorite and ultrasounds.
    Type: Grant
    Filed: October 26, 1999
    Date of Patent: May 15, 2001
    Assignee: Fidia Advanced Biopolymers S.r.l.
    Inventors: Lanfranco Callegaro, Davide Renier
  • Process for preparing a hyaluronic acid fraction having a low polydispersion index
    Patent number: 6020484
    Abstract: A process for preparing a hyaluronic acid fraction having an average molecular weight comprised between 5000 and 300,000 and a polydispersion index lower than 1.7, comprising treating the starting high molecular weight hyaluronic acid, contemporaneously with sodium hypochlorite and ultrasounds.
    Type: Grant
    Filed: June 12, 1998
    Date of Patent: February 1, 2000
    Assignee: Fidia Advanced Biopolymers S.r.l.
    Inventors: Lanfranco Callegaro, Davide Renier