Patents by Inventor Luigi Aliperta

Luigi Aliperta 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: 20210324166
    Abstract: A process for the production of expanded material based on sulfone polymers includes an extrusion step in an extruder of virgin sulfone polymer with the injection of at least one expanding agent and in the presence of at least one nucleating agent, and a recycling step of part of the expanded material, which provides a recycled product used as raw material fed to the extruder in combination with the virgin sulfone polymer.
    Type: Application
    Filed: June 14, 2021
    Publication date: October 21, 2021
    Inventors: Luigi Aliperta, Raffaela Bressan, Stephen Leonard Jackson, Robert Wayne Shelton
  • Patent number: 11066532
    Abstract: A process for the production of expanded material based on sulfone polymers includes an extrusion step in an extruder of virgin sulfone polymer with the injection of at least one expanding agent and in the presence of at least one nucleating agent, and a recycling step of part of the expanded material, which provides a recycled product used as raw material fed to the extruder in combination with the virgin sulfone polymer.
    Type: Grant
    Filed: January 15, 2018
    Date of Patent: July 20, 2021
    Inventors: Luigi Aliperta, Raffaela Bressan, Stephen Leonard Jackson, Robert Wayne Shelton
  • Patent number: 11007676
    Abstract: A process for the production of a polymeric agglomerate obtained from expanded sulfone polymer recovered from extrusion or injection molding processes of sulfone polymer, the agglomeration of said expanded sulfone polymer being effected in said process. With respect to the known art for the production of expanded sulfone polymers that use starting virgin sulfone polymers, the present invention offers the advantage of providing a recovered expanded sulfone polymer which can be used as starting material together with the corresponding virgin sulfone polymer.
    Type: Grant
    Filed: January 18, 2018
    Date of Patent: May 18, 2021
    Inventors: Luigi Aliperta, Raffaela Bressan, Stephen Leonard Jackson, Robert Wayne Shelton
  • Publication number: 20190366589
    Abstract: A process for the production of a polymeric agglomerate obtained from expanded sulfone polymer recovered from extrusion or injection molding processes of sulfone polymer, the agglomeration of said expanded sulfone polymer being effected in said process. With respect to the known art for the production of expanded sulfone polymers that use starting virgin sulfone polymers, the present invention offers the advantage of providing a recovered expanded sulfone polymer which can be used as starting material together with the corresponding virgin sulfone polymer.
    Type: Application
    Filed: January 18, 2018
    Publication date: December 5, 2019
    Inventors: Luigi Aliperta, Raffaela Bressan, Stephen Leonard Jackson, Robert Wayne Shelton
  • Publication number: 20190330435
    Abstract: A process for the production of expanded material based on sulfone polymers includes an extrusion step in an extruder of virgin sulfone polymer with the injection of at least one expanding agent and in the presence of at least one nucleating agent, and a recycling step of part of the expanded material, which provides a recycled product used as raw material fed to the extruder in combination with the virgin sulfone polymer.
    Type: Application
    Filed: January 15, 2018
    Publication date: October 31, 2019
    Inventors: Luigi Aliperta, Raffaela Bressan, Stephen Leonard Jackson, Robert Wayne Shelton
  • Patent number: 9394417
    Abstract: A process for the production of PET foams includes the extrusion of a mixture of PET, epoxy resin, catalyst consisting of imidazole, derivatives of imidazole or mixtures thereof plus a blowing agent, wherein the homopolymerization reaction of the epoxy phase is performed in the extruder, upstream of the introduction of the blowing agent. Compared to the methods of the known art, a process according to the invention offers the advantage of providing a stable PET foam, in which the structure of the polymer chains is kept unaltered. The system therefore has viscoelasticity characteristics which allow the PET/epoxy homopolymer to receive the expanding action of the blowing agent, as far as the innermost and deepest layers of foam also even if they have a significant thickness.
    Type: Grant
    Filed: January 14, 2013
    Date of Patent: July 19, 2016
    Assignee: DIAB INTERNATIONAL AB
    Inventors: Leone Lauri, Raffaela Bressan, Luigi Aliperta, Eva-Lotta Magdalena Petersson
  • Publication number: 20140357744
    Abstract: A process for the production of PET foams includes the extrusion of a mixture of PET, epoxy resin, catalyst consisting of imidazole, derivatives of imidazole or mixtures thereof plus a blowing agent, wherein the homopolymerization reaction of the epoxy phase is performed in the extruder, upstream of the introduction of the blowing agent. Compared to the methods of the known art, a process according to the invention offers the advantage of providing a stable PET foam, in which the structure of the polymer chains is kept unaltered. The system therefore has viscoelasticity characteristics which allow the PET/epoxy homopolymer to receive the expanding action of the blowing agent, as far as the innermost and deepest layers of foam also even if they have a significant thickness.
    Type: Application
    Filed: January 14, 2013
    Publication date: December 4, 2014
    Applicant: DIAB INTERNATIONAL AB
    Inventors: Leone Lauri, Raffaela Bressan, Luigi Aliperta, Eva-Lotta Magdalena Petersson