Patents by Inventor Stefanio Bonsignore

Stefanio Bonsignore 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).

  • Chlorinated promoters for vanadium-based polymerization catalysts
    Patent number: 7514386
    Abstract: Promoters are described for vanadium-based catalysts used in the (co)polymerization of olefins and, in particular, in the production of ethylene/propylene (EPR) or ethylene/propylene/diene (EPDM) elastomeric copolymers. The promoters of the present invention belong to the group of compounds having general formula I: wherein: “X” represents a (—CO—) carbonyl or (—SO2—) sulfonyl group; “n” is 0 or 1; R? is an alkyl or alkylaryl group having from 1 to 20 carbon atoms; R?=R?, H.
    Type: Grant
    Filed: May 26, 2005
    Date of Patent: April 7, 2009
    Assignee: Polimeri Europa S.p.A.
    Inventors: Stefanio Bonsignore, Marco Ricci, Antonio Alfonso Proto, Maria Rivellini, legal representative, Laura Santi, legal representative, Stefano Santi, legal representative, Gian Paolo Ravanetti, Andrea Vallieri, Roberto Santi
  • Chlorinated promoters for vanadium-based polymerization catalysts
    Publication number: 20050274928
    Abstract: Promoters are described for vanadium-based catalysts used in the (co)polymerization of olefins and, in particular, in the production of ethylene/propylene (EPR) or ethylene/propylene/diene (EPDM) elastomeric copolymers. The promoters of the present invention belong to the group of compounds having general formula I: wherein: “X” represents a (—CO—) carbonyl or (—SO2—) sulfonyl group; “n” is 0 or 1; R? is an alkyl or alkylaryl group having from 1 to 20 carbon atoms; R?=R?, H.
    Type: Application
    Filed: May 26, 2005
    Publication date: December 15, 2005
    Applicant: POLIMERI EUROPA S.p.A.
    Inventors: Stefanio Bonsignore, Marco Ricci, Antonio Proto, Roberto Santi, Maria Rivellini, Laura Santi, Stefano Santi, Gian Ravanetti, Andrea Vallieri
  • Tungsten- or molybdenum-based, supported compositions, process for obtaining them and their properties as heterogeneous oxidation catalysts
    Patent number: 5364951
    Abstract: Tungsten-(VI) or molybdenum-(VI)-based compounds which contain cationic groups from onium salts anchored on solid inorganic matrices having the general formula (I):(P) - - - [(CH.sub.2).sub.n Q.sup.+ RR'R"].sub.2 [M.sub.2 O.sub.11 ].sup.2-(I)wherein:(P) represents a solid matrix of inorganic type;n represents an integer comprised within the range of from 1 to 20;Q represents a pentavalent element belonging to Group VA of the Periodic System;R, R' and R", which may be the same or different from each other, represent a hydrogen atom or an alkyl C.sub.1 C.sub.20 group;M represents a tungsten or molybdenum atom.
    Type: Grant
    Filed: October 14, 1993
    Date of Patent: November 15, 1994
    Assignee: Eniricerche S.P.A.
    Inventors: Paolo Soncini, Stefanio Bonsignore
  • Class of peroxy compounds based on tungsten and diphosphonic acids and process for obtaining them
    Patent number: 5324849
    Abstract: Disclosed is a class of compounds based on tungsten and diphosphonic acids, which contain active oxygen atoms and cationic groups deriving from onium salts.Also disclosed is the method for preparing and using said class of compounds for olefin oxidation and diol and acid oxidation reactions.
    Type: Grant
    Filed: December 22, 1992
    Date of Patent: June 28, 1994
    Assignee: Enichem S.P.A.
    Inventors: Stefanio Bonsignore, Rino D'Aloisio, Paolo Soncini, Carlo Venturello
  • Compositions of refinery hydrocarbons endowed with improved fluidity at low temperatures containing methacyclophanes
    Patent number: 5171330
    Abstract: The fluidity at low temperatures of compositions based on refinery liquid hydrocarbons can be improved by adding, preferably under solution, [l.sub.4 ]-methacyclophanes with substituents, obtained from the condensation reaction of a resorcin with a product containing an aldehyde group, followed by a reaction with halides of organic acids or alkyl halides.
    Type: Grant
    Filed: June 7, 1991
    Date of Patent: December 15, 1992
    Assignee: Societa' Italiana Additivi Per Carburanti
    Inventors: Ettore Santoro, Luciano Canova, Enrico Dalcanale, Stefanio Bonsignore, Paolo Falchi
  • Process for recovering lactic acid from solutions which contain it
    Patent number: 5089664
    Abstract: Process for extracting lactic acid from aqueous acidic media is disclosed which process includes treatment with a complexing macrocyclic octol and organic solvent immiscible with water, separating the organic phase containing the lactic acid-macrocyclic octol complex thereby formed, which releases the lactic acid by treatment with alkaline water or with methanol.
    Type: Grant
    Filed: December 19, 1989
    Date of Patent: February 18, 1992
    Assignee: Istituto Guido Donegani S.p.A.
    Inventors: Enrico Dalcanale, Stefanio Bonsignore, Annick Du vosel
  • Macrocyclic tetramers having columnar tridimensional mesophases
    Patent number: 4918217
    Abstract: Octa-substituted derivatives of the macrocyclic tetramers obtained by condensation of resorcinol with an alkyl aldehyde, wherein the sutstituents are alkanoyl, p-alkylbenzoyl, and p-alkoxybenzoyl chains. These substituted tetramers show stable, tridimensional, columnar type mesophases wherein the crystalline lattice is formed with the central macrocyclic rings stacked one on another according to ordered columns, each ring being surrounded with alkyl chains in the melted state.
    Type: Grant
    Filed: July 20, 1988
    Date of Patent: April 17, 1990
    Assignee: Montedison S.p.A.
    Inventors: Enrico Dal Canale, Stefanio Bonsignore, Annick Du Vosel