Patents by Inventor Marinella Levi

Marinella Levi 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: 20210040293
    Abstract: There is described a binding resin for nonwoven fabrics, in particular for manufacturing supports for bituminous membranes, consisting of 100% natural, sustainable raw materials. The resin is an aqueous solution consisting of starch, a crosslinking agent of natural origin and a catalyst.
    Type: Application
    Filed: August 24, 2020
    Publication date: February 11, 2021
    Applicant: POLITEX s.a.s. di FREUDENBERG POLITEX s.r.l.
    Inventors: Massimo MIGLIAVACCA, Marinella LEVI, Stefano TURRI
  • Publication number: 20180370129
    Abstract: An apparatus and method for three-dimensional printing of composite materials of continuous fibre, in which a feed head for feeding a compound material of continuous fibre is moved so as to print a three-dimensional object; a means for relative movement between the feed head and the three-dimensional object exerts a drawing force on the compound material of continuous fibre, so as to bring about the feeding of the material; this material is realized at a station arranged upstream of the feed head.
    Type: Application
    Filed: November 17, 2016
    Publication date: December 27, 2018
    Inventors: Gabriele NATALE, Marinella LEVI, Giovanni POSTIGLIONE
  • Publication number: 20140273685
    Abstract: There is described a binding resin for nonwoven fabrics, in particular for manufacturing supports for bituminous membranes, consisting of 100% natural, sustainable raw materials. The resin is an aqueous solution consisting of starch, a crosslinking agent of natural origin and a catalyst.
    Type: Application
    Filed: October 16, 2012
    Publication date: September 18, 2014
    Applicant: POLITEX s.a.s. di FREUDENBERG POLITEX s.r.l.
    Inventors: Massimo Migliavacca, Marinella Levi, Stefano Turri
  • Publication number: 20110244204
    Abstract: The present invention concerns a textile support for bituminous membranes, particularly for waterproofing roof surfaces of buildings, characterised by a high dimensional stability. The support comprises at least two layers (1, 2) of non-woven polyester or polymeric material in general and a plurality of longitudinal reinforcing filaments (3). The reinforcing filaments (3), preferably of glass, have been treated in advance with a size which allows the formation of stable chemical bonds, not strongly influenced by temperature.
    Type: Application
    Filed: December 12, 2008
    Publication date: October 6, 2011
    Inventors: Massimo Migliavacca, Stefano Turri, Marinella Levi
  • Patent number: 7323435
    Abstract: Fluorinated oligourethanes, having number average molecular weight lower than or equal to 9,000, having a branched structure, formed of the following monomers and macromers: a) aliphatic, cycloaliphatic or aromatic polyisocyanates, b) heterofunctional hydrogenated monomers having general formula: X0—(CR1AR2A)b—Y0 ??(Ib) one or more of the following compounds: c) bifunctional hydroxyl (per)fluoropolyethers (PFPE diols) having number average molecular weight in the range 400-3,000, e) monofunctional hydroxyl (per)fluoropolyethers or monofunctional hydroxyl (per)fluoroalkanes (e?), having number average molecular weight in the range 300-1,000, and optionally the following compounds: d) heterofunctional monomers, dI) hydrogen-active compounds, capable to form bonds with the NCO functions stable at the hydrolysis but weak at heat.
    Type: Grant
    Filed: June 12, 2000
    Date of Patent: January 29, 2008
    Assignee: Ausimont S.p.A.
    Inventors: Stefano Turri, Marinella Levi, Tania Trombetta
  • Patent number: 5900500
    Abstract: Perfluoropolyethereal compounds having polycarbonate structure, and general formula: ##STR1## wherein c is an integer comprised between 0 and 10, preferably between 0 and 3,n is an integer from 2 to 1,000, extremes included,Rf is a poly-fluorooxyalkylenic chain, having number average molecular weight (Mn) comprised between 500 and 10,000.
    Type: Grant
    Filed: July 30, 1997
    Date of Patent: May 4, 1999
    Assignee: Ausimont S.p.A.
    Inventors: Stefano Turri, Marinella Levi, Claudio Tonelli, Ferdinando Danusso
  • Patent number: 5637671
    Abstract: 1) Disclosed herein are new fluorine-containing compounds having polyacetalic structure, of general formula:[Rf.sub.m --CH.sub.2 O(CH.sub.2 O).sub.c --CH.sub.2 --.brket close-st..sub.n (I)where:Rf=a perfluorooxyalkylene chain having Mn from 500 to 5,000;m=4-25;c=1-10;n=2-100.2) A process for preparing them which comprises carrying out the polycondensation of diols having formula:HORfOH (II)with formaldehyde, in mass or in the presence of solvents, in an acid medium. The compounds of formula (I) can be oligomeric compounds (polymerization degree x.sub.n from 2 to about 20) or polymeric compounds (x.sub.n from about 20 to about 100). They exhibit a high stability to heat and to chemical agents, and Tg values slightly different from the ones of the diols utilized for preparing them.
    Type: Grant
    Filed: October 12, 1995
    Date of Patent: June 10, 1997
    Assignee: Ausimont S.p.A.
    Inventors: Ferdinando Danusso, Ezio Strepparola, Marinella Levi, Claudio Tonelli, Stefano Turri
  • Patent number: 5508380
    Abstract: Fluorinated polymers having thermoplastic elastomeric properties comprising in the macromolecule perfluoropolyoxyalkylene sequences of formula:--CF.sub.2 O--(CF.sub.2 CF.sub.2 O).sub.m --(CF.sub.2 O).sub.n --CF.sub.2 --(I)where m/n=0.2+5, are obtained through polycondensation with suitable perfluoropolyoxyalkylene condensation monomers corresponding to formula (I), functionalized with suitable reactive groups and having a functionality at least equal to 1.97, preferably at least equal to 1.99.Such polymers are characterized by an average molecular weight at least 50%, preferably at least 100%, higher than that of the corresponding polymers obtained starting from perfluoropolyoxyalkylenes corresponding to formula (I) having a functionality not higher than 1.96.
    Type: Grant
    Filed: August 21, 1995
    Date of Patent: April 16, 1996
    Assignee: Ausimont, S.p.A.
    Inventors: Stefano Turri, Giuseppe Gianotti, Marinella Levi, Claudio Tonelli
  • Patent number: 5476918
    Abstract: 1) New fluorine-containing compounds having polyacetalic structure, of general formula:(I)[Rf.sub.m --CH.sub.2 O(CH.sub.2 O).sub.c --CH.sub.2 ].sub.nwhere:Rf=a perfluorooxyalkylene chain having Mn from 500 to 5,000;m=4-25;c=1-10;n=2-100.2) A process for preparing them, which comprises carrying out the polycondensation of diols having formula:(II) HORfOHwith formaldehyde, in mass or in the presence of solvents, in an acid medium. The compounds of formula (I) can be oligomeric compounds (polymerization degree x.sub.n from 2 to about 20) or polymeric compounds (x.sub.n from about 20 to about 100). They exhibit a high stability to heat and to chemical agents, and Tg values slightly different from the ones of the diols utilized for preparing them.
    Type: Grant
    Filed: May 5, 1993
    Date of Patent: December 19, 1995
    Assignee: Ausimont, S.p.A.
    Inventors: Ferdinando Danusso, Ezio Strepparola, Marinella Levi, Claudio Tonelli, Stefano Turri
  • Patent number: 5476910
    Abstract: Fluorinated thermoplastic elastomers having a block structure:--[--R.sub.f --H.sub.1 --H.sub.2 --H.sub.1 --]--where --R.sub.f -- is a perfluoropolyoxyalkylene sequence of formula:--CF.sub.2 O--(CF.sub.2 CF.sub.2 O).sub.m --(CF.sub.2 O).sub.n --CF.sub.2 --with m/n=0.2.div.5, H.sub.1 and H.sub.2, equal or different from each other, are bivalent radicals having arylene, alkylarylene, alkylene or cycloalkylene structure, optionally containing fluorine and/or other heteroatoms selected among oxygen, sulphur, nitrogen. Such products are obtainable by utilizing a perfluoropolyoxyalkylene diol having a functionality at least equal to 1.97, preferably at least equal to 1.99, and are characterized by a tensile strength at 23.degree. C. at least 50% higher than that of the corresponding polyesters obtained starting from perfluoropolyoxyalkylene diols having a functionality not higher than 1.96.
    Type: Grant
    Filed: April 15, 1994
    Date of Patent: December 19, 1995
    Assignee: Ausimont, S.p.A.
    Inventors: Stefano Turri, Giuseppe Gianotti, Marinella Levi, Claudio Tonelli
  • Patent number: 5262057
    Abstract: A process for separating from one another non-functional, monofunctional and bifunctional species in a mixture of perfluoropolyoxyalkylenes of general formulaX--O--Rf--Ywhere:Rf=a perfluoropolyoxyalkylene chain comprising monomeric units of formulas (CF.sub.2 O), (CF.sub.2 CF.sub.2 O), (CF.sub.2 CF.sub.2 CF.sub.2 O),X, Y, like or different from each other, are non-functional end groups or end groups containing functions OH and/or NH.sub.2,which consists in subjecting said mixture of perfluoropolyoxyalkylenes to column chromatography using, as eluents, non-polar fluorinated solvents, either alone or in admixture with polar solvents.
    Type: Grant
    Filed: October 19, 1992
    Date of Patent: November 16, 1993
    Assignee: Ausimont S.p.A.
    Inventors: Claudio Tonelli, Stefano Turri, Giuseppe Gianotti, Marinella Levi
  • Patent number: 5246588
    Abstract: A process for separating, or enriching, non-functional, monofunctional and bifunctional species in a mixture of perfluoropolyoxyalkylenes of the general formula:Z--O--Rf--YwhereRf=a perfluoropolyoxyalkylene chain comprising one or more monomeric units of formula ##STR1## --CFXO-- (X=F, CF.sub.3), and optionally also units (--CF.sub.2 CF.sub.2 O--); andZ, Y, like or different from each other, are non-functional groups or functional groups containing --OH,which consists in subjecting said mixture of perfluoropolyoxyalkylenes to column chromatography using, as eluents, non-polar fluorinated solvents, either alone or in admixture with polar solvents.
    Type: Grant
    Filed: October 20, 1992
    Date of Patent: September 21, 1993
    Assignee: Ausimont S.p.A.
    Inventors: Claudio Tonelli, Stefano Turri, Marinella Levi, Giuseppe Gianotti