Patents by Inventor Sandra Righi

Sandra 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).

  • Process for the preparation of branched polydienes in the presence of catalysts based on rare-earth
    Patent number: 7078466
    Abstract: A process is described for the preparation of polydienes with a low vinyl content and having a branched structure effected by means of the polymerization of conjugated dienes in the presence of catalysts based on rare-earth compounds. The resulting polymers are characterized in that they have a cis content varying from 80 to 96% and prove to be branched with consequent low viscosity values in solution.
    Type: Grant
    Filed: December 17, 2003
    Date of Patent: July 18, 2006
    Assignee: Polimeri Europa S.p.A.
    Inventors: Alessandro Balducci, Sandra Righi
  • Process for the preparation of branched polydienes in the presence of catalysts based on rare-earth
    Publication number: 20040127665
    Abstract: A process is described for the preparation of polydienes with a low vinyl content and having a branched structure effected by means of the polymerization of conjugated dienes in the presence of catalysts based on rare-earth compounds. The resulting polymers are characterized in that they have a cis content varying from 80 to 96% and prove to be branched with consequent low viscosity values in solution.
    Type: Application
    Filed: December 17, 2003
    Publication date: July 1, 2004
    Applicant: POLIMERI EUROPA S.p.A.
    Inventors: Alessandro Balducci, Sandra Righi