Patents by Inventor Carlo Tavazzani

Carlo Tavazzani 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).

  • Low haze transparent compositions and processes for preparing them
    Patent number: 5183851
    Abstract: This invention relates to low haze impact-resistant transparent compositions, comprising:(a) 40-99% by weight of a thermoplastic resin based on homopolymers and/or copolymers of alkyl-methacrylates with minor amounts of alkyl-acrylates, wherein the alkyl group contains from 1 to 8 carbon atoms, and(b) 60-1% by weight of a polymer having a multi-layer structure, based on elastomers arranged sequentially to thermoplastic resins as defined in step (a).
    Type: Grant
    Filed: September 3, 1991
    Date of Patent: February 2, 1993
    Assignee: ELF Atochem Italia S.r.l.
    Inventors: Francesco Visani, Carlo Tavazzani, Giuseppe Ajroldi, Giovanni Castiglioni
  • 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