Patents by Inventor Roberto Provera

Roberto Provera 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 ethylene copolymers
    Patent number: 7273913
    Abstract: A process is described for the preparation of ethylene copolymers having a wide molecular weight distribution, characterized in that it is carried out in the presence of meso- and rac-stereoisomeric mixtures of metallocene compounds having general formula (I), wherein A? and A?, the same or different, are a radical of the ??5-tetrahydroindenyl type (Ia)
    Type: Grant
    Filed: November 18, 2002
    Date of Patent: September 25, 2007
    Assignee: Polimeri Europa S.p.A.
    Inventors: Paolo Biagini, Stefano Ramello, Roberto Provera, Maria Rivellini, legal representative, Stefano Santi, legal representative, Laura Santi, legal representative, Roberto Santi, deceased
  • Process for the preparation of ethylene copolymers
    Publication number: 20060014911
    Abstract: A process is described for the preparation of ethylene copolymers having a wide molecular weight distribution, characterized in that it is carried out in the presence of meso- and rac-stereoisomeric mixtures of metallocene compounds having general formula (I), wherein A? and A?, the same or different, are a radical of the ??5L-tetrahydroindenyl type (Ia).
    Type: Application
    Filed: November 18, 2002
    Publication date: January 19, 2006
    Applicant: Polimeri Eurpoa S.p.A.
    Inventors: Paolo Biagini, Stefano Ramello, Roberto Provera, Roberto Santi, Maria Rivellini, Stefano Santi, Laura Santi
  • Titanium catalysts, preparation and use in co- and ter-polymerization of alpha-olefins
    Patent number: 6900155
    Abstract: Titanium complex having general formula (I) (RCOO)nTiXp wherein R is a monofunctional hydrocarbyl radical having from 1 to 20 carbon atoms and a number of halogen atoms, selected from fluorine, chlorine and bromine, preferably chlorine, ranging from 1 to 6; X is chlorine, bromine or a beta-dicarbonyl group such as acetylacetone (AcAc), formylacetone, benzoylacetone, dibenzoylmethane; p+n=2, 3, 4, preferably p+n=3; n is greater than or equal to 1. The preparation of the above complex and its use in the co- and ter-polymerization of ?-olefins, are also described.
    Type: Grant
    Filed: March 20, 2002
    Date of Patent: May 31, 2005
    Assignee: Polimer Europa S.p.A.
    Inventors: Francesco Masi, Roberto Santi, Stefano Ramello, Anna Sommazzi, Roberto Provera, Antonio Proto
  • Process for the preparation of ep(d)m elastomeric copolymers and terpolymers
    Patent number: 6861543
    Abstract: A process is described for the preparation of elastomeric EP(D)M copolymers and terpolymers, characterized in that it is carried out in the presence of metallocene compounds of general formula (I) having a racemic stereoisomerism
    Type: Grant
    Filed: April 23, 2002
    Date of Patent: March 1, 2005
    Assignee: Polimeri Europa S.p.A.
    Inventors: Paolo Biagini, Stefano Ramello, Roberto Provera, Roberto Santi
  • Process for the preparation of ep(d)m elastomeric copolymers and terpolymers
    Publication number: 20040167017
    Abstract: A process is described for the preparation of elastomeric EP(D)M copolymers and terpolymers, characterized in that it is carried out in the presence of metallocene compounds of general formula (I) having a racemic stereoisomerism.
    Type: Application
    Filed: April 21, 2004
    Publication date: August 26, 2004
    Inventors: Paolo Biagini, Stefano Ramello, Roberto Provera, Roberto Santi
  • Titanium catalysts, preparation and use in co- and ter-polymerization of alpha-olefins
    Publication number: 20040143127
    Abstract: Titanium complex having general formula (1) (RCOO)nTiXp wherein R is a monofunctional hydrocarbyl radical having from 1 to 20 carbon atoms and a number of halogen atoms, selected from fluorine, chlorine and bromine, preferably chlorine, ranging from 1 to 6; X is chlorine, bromine or a beta-dicarbonyl group such as acetylacetone (AcAc), formylacetone, benzoylacetone, dibenzoylmethane; p+n=2, 3, 4, preferably p+n=3; n is greater than or equal to 1. The preparation of the above complex and its use in the co- and ter-polymerization of &agr;-olefins, are also described.
    Type: Application
    Filed: March 16, 2004
    Publication date: July 22, 2004
    Inventors: Francesco Masi, Roberto Santi, Stefano Ramello, Anna Sommazzi, Roberto Provera, Antonio Proto