Patents by Inventor Francesca Alfano

Francesca Alfano 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).

  • Tactic polymer polymerization process using chiral catalysts
    Patent number: 8148482
    Abstract: A process for forming tactic polymers employing at least one olefin polymerization catalyst comprising a non-racemic mixture of the R- and S-enantiomers of a metal complex containing at least one asymmetrically substituted (chiral) carbon atom, and a chain shuttling agent, a polar aprotic organic compound, or both a chain shuttling agent and a polar aprotic organic compound.
    Type: Grant
    Filed: May 1, 2008
    Date of Patent: April 3, 2012
    Assignee: Dow Global Technologies LLC
    Inventors: Vincenzo Busico, Harold W. Boone, James C. Stevens, Francesca Alfano, Roberta Cipullo
  • Multi-block copolymer process using polar solvents
    Patent number: 8129487
    Abstract: A process for forming a high molecular weight, multi-block copolymer comprising two or more chemically distinguishable segments or blocks, the process comprising polymerizing one or more olefin monomers in the presence of a chain shuttling agent and a catalyst composition comprising two or more olefin polymerization catalysts capable of preparing polymers having differing chemical or physical properties under equivalent polymerization conditions, or a catalyst composition comprising at least one olefin polymerization catalyst containing multiple active catalyst sites capable of preparing polymers having differing chemical or physical properties.
    Type: Grant
    Filed: May 1, 2008
    Date of Patent: March 6, 2012
    Assignee: Dow Global Technologies LLC
    Inventors: Vincenzo Busico, Francesca Alfano, Harold W. Boone, Roberta Cipullo, James C. Stevens
  • TACTIC POLYMER POLYMERIZATION PROCESS USING CHIRAL CATALYSTS
    Publication number: 20100222516
    Abstract: A process for forming tactic polymers employing at least one olefin polymerization catalyst comprising a non-racemic mixture of the R- and S-enantiomers of a metal complex containing at least one asymmetrically substituted (chiral) carbon atom, and a chain shuttling agent, a polar aprotic organic compound, or both a chain shuttling agent and a polar aprotic organic compound.
    Type: Application
    Filed: May 1, 2008
    Publication date: September 2, 2010
    Inventors: Vicenzo Busico, Harold W. Boone, James C. Stevens, Francesca Alfano, Roberta Cipullo
  • MULTI-BLOCK COPOLYMER PROCESS USING POLAR SOLVENTS
    Publication number: 20100190943
    Abstract: A process for forming a high molecular weight, multi-block copolymer comprising two or more chemically distinguishable segments or blocks, the process comprising polymerizing one or more olefin monomers in the presence of a chain shuttling agent and a catalyst composition comprising two or more olefin polymerization catalysts capable of preparing polymers having differing chemical or physical properties under equivalent polymerization conditions, or a catalyst composition comprising at least one olefin polymerization catalyst containing multiple active catalyst sites capable of preparing polymers having differing chemical or physical properties
    Type: Application
    Filed: May 1, 2008
    Publication date: July 29, 2010
    Inventors: Vincenzo Busico, Francesca Alfano, Harold W. Boone, Roberta Cipullo, James C. Stevens