Patents by Inventor Febo Severini

Febo Severini 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).

  • Impact resistant polystyrene and a process for its production
    Patent number: 4001349
    Abstract: Crude graft products of styrene on polyolefinic rubbers in which, in the gel, the polystyrene/polyolefinic rubber ratio is shifted to relatively high polystyrene contents, always higher than 1:1, and which graft products are characterized by a satisfactory, which is to say commercially acceptable, distribution of the rubber particles in the polystyrene matrix are obtained by subjecting a solution of a polyolefinic rubber or elastomer in styrene to polymerizing conditions in aqueous phase in the presence of a radical initiator and of a chain transfer agent.
    Type: Grant
    Filed: April 11, 1975
    Date of Patent: January 4, 1977
    Assignee: Montedison Fibre S.p.A.
    Inventors: Febo Severini, Carlo Tavazzani, Piero Delle Ville
  • Graft polymers of vinyl chloride on unsaturated olefinic elastomers and process for the preparation thereof
    Patent number: 3975458
    Abstract: Impact resistant compositions comprising crude graft polymers of vinyl chloride on unsaturated olefinic elastomers, said elastomers being copolymers of ethylene, an .alpha.-olefin and a diene or a polyene, are prepared by graft polymerizing vinyl chloride onto an olefinic elastomer. The graft polymerization is discontinued before 70% of the vinyl chloride has been polymerized.
    Type: Grant
    Filed: December 9, 1974
    Date of Patent: August 17, 1976
    Assignee: Montecatini Edison S.p.A.
    Inventors: Febo Severini, Alberto Valvassori, Alberto Pagliari