Patents by Inventor Roberto Ponti

Roberto Ponti 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).

  • Biodegradable foamed plastic materials
    Patent number: 5736586
    Abstract: Biodegradable foamed plastic material having a bulk density comprised within the range of from 5 to 13 kg/m.sup.3, comprising:30-99.5 by weight of polisaccharide containing more than 50% of thermoplastic starch or starch complexed by polimeric structures, having an intrinsic viscosity (in DMSO) lower than 1.3 dl/g and less than 20% by weight of soluble fraction in ethanol;0.5-70% by weight of a thermoplastic polymer which is soluble in starch, or is capable of complexing it;0-20% by weight of water.The material can be used as a loose filler or for other foamed articles.
    Type: Grant
    Filed: August 8, 1995
    Date of Patent: April 7, 1998
    Assignee: Novamont S.p.A.
    Inventors: Catia Bastioli, Vittorio Bellotti, Gianfranco Del Tredici, Alessandro Montino, Roberto Ponti
  • Film-forming, starchy, polymeric composition and shaped articles, particularly films and sheets, which can be produced from the composition and have a good barrier effect, and a method of producing the articles
    Patent number: 5462980
    Abstract: The film-forming polymeric compositions described include a synthetic, thermoplastic polymer and a starchy material, with a high amylopectin content; they enable the production of films, sheets and the like having good liquid- and gas-barrier effects and improved mechanical properties.
    Type: Grant
    Filed: March 5, 1993
    Date of Patent: October 31, 1995
    Assignee: Novamont S.p.A.
    Inventors: Catia Bastioli, Vittorio Bellotti, Gianfranco Del Tredici, Alessandro Montino, Roberto Ponti
  • Method of producing plasticized polyvinyl alcohol and its use for the preparation of starch-based, biodegradable thermoplastic compositions
    Patent number: 5462981
    Abstract: The method of producing plasticized polyvinyl alcohol by mixing polyvinyl alcohol in the presence of an organic plasticizer and water in a quantity which is insufficient to dissolve the polyvinyl alcohol under normal conditions, includes the steps of:i) pre-plasticizing the polyvinyl alcohol at a maximum temperature no higher than its softening point so as to produce a pre-plasticized polyvinyl alcohol having a melting point below the softening point of the polyvinyl alcohol used, andii) further processing the pre-plasticized polyvinyl alcohol thus produced at a temperature above its melting point, under shear-stress conditions and for a period of time to produce a substantially homogeneous melt.
    Type: Grant
    Filed: July 25, 1994
    Date of Patent: October 31, 1995
    Assignee: Novamont S.p.A.
    Inventors: Catia Bastioli, Vittorio Bellotti, Gianfranco Del Tredici, Roberto Ponti
  • Biodegradable polymeric compositions based on starch and thermoplastic polymers
    Patent number: 5412005
    Abstract: The biodegradable polymeric compositions comprise a starch based component and a polymeric component comprising polymers of hydroxyacids or mixtures thereof with polymers deriving from ethylenically unsaturated monomers, particularly polymers of ethylene-vinylalcohol or polyvinylalcohol.
    Type: Grant
    Filed: April 30, 1992
    Date of Patent: May 2, 1995
    Assignee: Novamont S.p.A.
    Inventors: Catia Bastioli, Vittorio Bellotti, Alessandro Montino, Gianfranco D. Tredici, Roberto Lombi, Roberto Ponti