Patents by Inventor Stefan Sproll

Stefan Sproll 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).

  • GAS-TIGHT TRACK-ETCHED MEMBRANES FOR EMERGENCY VENTING
    Publication number: 20260058293
    Abstract: The invention provides a gas-tight membrane for use as a burst membrane, especially for emergency venting in connection with batteries, e.g. for cars, e-bikes, handheld devices, electronic cigarettes, energy storing devices or heavy-duty tools. The membrane comprises a basic membrane having indentations obtained by an incomplete track-etch treatment applied to the basic membrane. Further, the invention provides a method for preparing the gas-tight membrane by an incomplete track-etch treatment applied to both sides of a basic membrane.
    Type: Application
    Filed: August 23, 2023
    Publication date: February 26, 2026
    Applicant: OXYPHEN GMBH
    Inventors: Vassili ALFIMOV, Stefan SPROLL, Franz MARTIN
  • Chamber for encapsulating secreting cells
    Patent number: 10668106
    Abstract: The invention relates to an encapsulating chamber for secreting cells, comprising a closed shell made of a semi-permeable membrane, said membrane comprising at least one layer of porous biocompatible polymer, and one layer of non-woven biocompatible polymer.
    Type: Grant
    Filed: July 10, 2018
    Date of Patent: June 2, 2020
    Assignee: DEFYMED
    Inventors: Richard Bou Aoun, Severine Sigrist, Stefan Sproll
  • CHAMBER FOR ENCAPSULATING SECRETING CELLS
    Publication number: 20180311282
    Abstract: The invention relates to an encapsulating chamber for secreting cells, comprising a closed shell made of a semi-permeable membrane, said membrane comprising at least one layer of porous biocompatible polymer, and one layer of non-woven biocompatible polymer.
    Type: Application
    Filed: July 10, 2018
    Publication date: November 1, 2018
    Applicant: Defymed
    Inventors: Richard Bou Aoun, Severine Sigrist, Stefan Sproll
  • Chamber for encapsulating secreting cells
    Patent number: 10022404
    Abstract: The invention relates to an encapsulating chamber for secreting cells, comprising a closed shell made of a semi-permeable membrane, said membrane comprising at least one layer of porous biocompatible polymer, and one layer of non-woven biocompatible polymer.
    Type: Grant
    Filed: December 9, 2014
    Date of Patent: July 17, 2018
    Assignee: DEFYMED
    Inventors: Richard Bou Aoun, Severine Sigrist, Stefan Sproll
  • A CHAMBER FOR ENCAPSULATING SECRETING CELLS
    Publication number: 20160310541
    Abstract: The invention relates to an encapsulating chamber for secreting cells, comprising a closed shell made of a semi-permeable membrane, said membrane comprising at least one layer of porous biocompatible polymer, and one layer of non-woven biocompatible polymer.
    Type: Application
    Filed: December 9, 2014
    Publication date: October 27, 2016
    Applicant: Defymed
    Inventors: Richard Bou Aoun, Severine Sigrist, Stefan Sproll