Patents by Inventor Gianfrancesco Margelli

Gianfrancesco Margelli 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).

  • Catalyst components for the polymerization of olefins
    Patent number: 7208436
    Abstract: Catalyst components for the polymerization of olefins CH2?CHR, wherein R is hydrogen or a hydrocarbon radical having 1–12 carbon atoms, comprising Mg, Ti, Cl, OR groups, where R is a C1–C10 alkyl group optionally containing heteroatoms, and an ether having two or more ether groups, characterized by the fact that the Mg/Ti weight ratio is lower than 3 from 2 to 6.5 the Cl/Ti weight ratio is from 1.5 to 6, the OR/Ti weight ratio is from 0.5 to 3.5 and at least 50% of the Titanium atoms are in a valence state lower than 4. The said catalyst components allow the preparation of ethylene copolymers with a low content of xylene soluble fractions.
    Type: Grant
    Filed: May 19, 2003
    Date of Patent: April 24, 2007
    Assignee: Basell Poliolenfine Italia s.r.l.
    Inventors: Tiziano Dall'Occo, Gianfrancesco Margelli
  • Catalyst components for the polymerization of olefins
    Publication number: 20050215424
    Abstract: Catalyst components for the polymerization of olefins CH2?CHR, wherein R is hydrogen or a hydrocarbon radical having 1-12 carbon atoms, comprising Mg, Ti, Cl, OR groups, where R is a C1-C10 alkyl group optionally containing heteroatoms, and an ether having two or more ether groups, characterized by the fact that the Mg/Ti weight ratio is lower than 3 from 2 to 6.5 the Cl/Ti weight ratio is from 1.5 to 6, the OR/Ti weight ratio is from 0.5 to 3.5 and at least 50% of the Titanium atoms are in a valence state lower than 4. The said catalyst components allow the preparation of ethylene copolymers with a low content of xylene soluble fractions.
    Type: Application
    Filed: May 19, 2003
    Publication date: September 29, 2005
    Applicant: BASELL POLIOLEFINE ITALIS S.P.A.
    Inventors: Tiziano Dall'Occo, Gianfrancesco Margelli