Patents by Inventor Gianni Benetta

Gianni Benetta 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).

  • Publication number: 20090292091
    Abstract: Production method of polyvinyl chloride in an agitated reactor under pressure, including polymerization of vinyl monomers in aqueous suspension, of the type in which at least one vinyl monomer in aqueous solution is introduced into a reactor under agitation, having the following steps: a)—adding a stabilizing-suspending agent in hydroalcoholic suspension of an inorganic mineral powder containing at least magnesium and hydroxyl groups to said reactor, b)—adding to said reactor b1) a base; b2) a peroxide compound; b3) a chloroformate; and b4) an organic acid anhydride whereupon the separate addition of b1), b2), b3), b4), to form the reaction catalyst in situ is only and exclusively in said reactor in order to create said catalyst progressively and under the control of the addition of said stabilizing-suspending agent a).
    Type: Application
    Filed: June 1, 2009
    Publication date: November 26, 2009
    Inventors: Gianni Benetta, David Cathersides
  • Patent number: 3998655
    Abstract: Incrustations of vinyl chloride polymers and copolymers are removed from the polymerization reactors by dissolving said incrustations at a temperature above C in a solvent chosen from the substituted amides up to a polymeric compound content in the resulting solution not exceeding 7% by weight, concentrating the resulting solution to a 10-30 wt. % polymeric compound content by evaporating a mixture of solvent and water, extruding the concentrated solution into an aqueous coagulating bath and recovering the spun product. The solvent is recovered by fractional distillation of the vaporized mixture and of the solvent-enriched coagulating bath.
    Type: Grant
    Filed: July 23, 1975
    Date of Patent: December 21, 1976
    Assignee: Societa' Italiana Resine S.I.R. S.p.A.
    Inventors: Gianni Benetta, Francesco Testa