Patents by Inventor Federico Orsini

Federico Orsini 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 and process for the syndiotactic polymerization of vinylaromatic compounds
    Patent number: 6184316
    Abstract: A catalyst for the polymerization of vinylaromatic monomers, and particularly styrene, with a high yield and a high syndiotacticity index, comprises the product consisting of the following two components in contact with each other: A) an &eegr;5-cyclopentadienyl complex of titanium; B) an organo-oxygenated compound of aluminum; and contains a sufficient amount of at least one carboxylated product having the following general formula: R—COO—G  (I) wherein R—COO is a carboxylic group comprising the organic radical R having from 1 to 30 carbon atoms, and G represents a hydrogen atom, an aliphatic or aromatic hydrocarbon group having from 1 to 20 carbon atoms or a metal atom, possibly substituted, linked to said carboxylic group.
    Type: Grant
    Filed: February 25, 1998
    Date of Patent: February 6, 2001
    Assignee: Enichem S.p.A.
    Inventors: Francesco Masi, Riccardo PO′, Francesco Menconi, Giuseppe Conti, Francesco Ciardelli, Angelina Altomare, Federico Orsini, Roberto Santi, Nicoletta Cardi