Patents by Inventor Zengwei GUO

Zengwei GUO 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: 20240002628
    Abstract: A method for recycling polyester from a polyester textile. The method comprises the steps of: providing said polyester textile soaked in a mixture comprising a solvent and a catalyst, providing and maintaining a temperature of said mixture comprising said polyester textile within a range of 80-240° C. during depolymerization of polyester in said polyester textile and wherein, in said step of providing said polyester textile soaked in said mixture, said catalyst of said mixture comprises calcium hydroxide. A catalyst may be used for depolymerization of polyester in a polyester textile, wherein the catalyst comprises calcium hydroxide. Natural fibers may be recovered from a textile comprising polyester and natural fibers.
    Type: Application
    Filed: September 18, 2023
    Publication date: January 4, 2024
    Applicant: IKEA Supply AG
    Inventor: Zengwei GUO
  • Patent number: 11802190
    Abstract: A method for recycling polyester from a polyester textile. The method comprises the steps of: providing said polyester textile soaked in a mixture comprising a solvent and a catalyst, providing and maintaining a temperature of said mixture comprising said polyester textile within a range of 80-240° C. during depolymerization of polyester in said polyester textile and wherein, in said step of providing said polyester textile soaked in said mixture, said catalyst of said mixture comprises calcium hydroxide. A catalyst may be used for depolymerization of polyester in a polyester textile, wherein the catalyst comprises calcium hydroxide. Natural fibers may b e recovered from a textile comprising polyester and natural fibers.
    Type: Grant
    Filed: August 16, 2019
    Date of Patent: October 31, 2023
    Assignee: IKEA Supply AG
    Inventor: Zengwei Guo
  • Publication number: 20230272182
    Abstract: A method for recovering natural fibers from a textile comprising polyester and natural fibers. The method comprises the steps of: providing said textile soaked in a mixture comprising a solvent and a catalyst, providing and maintaining a temperature of said mixture comprising said textile within a range of 80-240° C. during depolymerization of polyester in said textile; and recovering natural fibers after said depolymerization, wherein, in said step of providing said textile soaked in said mixture, said catalyst of said mixture comprises calcium oxide.
    Type: Application
    Filed: May 8, 2023
    Publication date: August 31, 2023
    Applicant: IKEA Supply AG
    Inventor: Zengwei GUO
  • Patent number: 11680151
    Abstract: A method for recovering natural fibers from a textile comprising polyester and natural fibers. The method comprises the steps of: providing said textile soaked in a mixture comprising a solvent and a catalyst, providing and maintaining a temperature of said mixture comprising said textile within a range of 80-240° C. during depolymerization of polyester in said textile; and recovering natural fibers after said depolymerization, wherein, in said step of providing said textile soaked in said mixture, said catalyst of said mixture comprises calcium oxide.
    Type: Grant
    Filed: May 3, 2021
    Date of Patent: June 20, 2023
    Assignee: IKEA Supply AG
    Inventor: Zengwei Guo
  • Publication number: 20210309825
    Abstract: A method for recycling polyester from a polyester textile. The method comprises the steps of: providing said polyester textile soaked in a mixture comprising a solvent and a catalyst, providing and maintaining a temperature of said mixture comprising said polyester textile within a range of 80-240° C. during depolymerization of polyester in said polyester textile and wherein, in said step of providing said polyester textile soaked in said mixture, said catalyst of said mixture comprises calcium hydroxide. A catalyst may be used for depolymerization of polyester in a polyester textile, wherein the catalyst comprises calcium hydroxide. Natural fibers may be recovered from a textile comprising polyester and natural fibers.
    Type: Application
    Filed: August 16, 2019
    Publication date: October 7, 2021
    Applicant: IKEA Supply AG
    Inventor: Zengwei GUO
  • Publication number: 20210261748
    Abstract: A method for recovering natural fibers from a textile comprising polyester and natural fibers. The method comprises the steps of: providing said textile soaked in a mixture comprising a solvent and a catalyst, providing and maintaining a temperature of said mixture comprising said textile within a range of 80-240° C. during depolymerization of polyester in said textile; and recovering natural fibers after said depolymerization, wherein, in said step of providing said textile soaked in said mixture, said catalyst of said mixture comprises calcium oxide.
    Type: Application
    Filed: May 3, 2021
    Publication date: August 26, 2021
    Applicant: IKEA Supply AG
    Inventor: Zengwei GUO
  • Patent number: 11021589
    Abstract: A method for recycling polyester from a polyester textile comprises the steps of: providing said polyester textile soaked in a mixture comprising a solvent and a catalyst, providing and maintaining a temperature of said mixture comprising said polyester textile within a range of 80-240° C. during depolymerization of polyester in said polyester textile and wherein, in said step of providing said polyester textile soaked in said mixture, said catalyst of said mixture comprises calcium oxide. A catalyst may be used for depolymerization of polyester in a polyester textile, wherein the catalyst comprises calcium oxide.
    Type: Grant
    Filed: February 19, 2018
    Date of Patent: June 1, 2021
    Assignee: IKEA Supply AG
    Inventor: Zengwei Guo
  • Publication number: 20200157307
    Abstract: The present invention relates to a method for recycling polyester from a polyester textile. The method comprises the steps of: providing said polyester textile soaked in a mixture comprising a solvent and a catalyst, providing and maintaining a temperature of said mixture comprising said polyester textile within a range of 80-240° C. during depolymerization of polyester in said polyester textile and wherein, in said step of providing said polyester textile soaked in said mixture, said catalyst of said mixture comprises calcium oxide. The invention also relates to use of a catalyst for depolymerization of polyester in a polyester textile, wherein the catalyst comprises calcium oxide.
    Type: Application
    Filed: February 19, 2018
    Publication date: May 21, 2020
    Applicant: Swerea IVF AB
    Inventor: Zengwei GUO