Patents by Inventor Fredrik Jakobsson

Fredrik Jakobsson 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).

  • Polymer and organic light-emitting device
    Patent number: 10985322
    Abstract: Light-emitting composition and devices including the same, the composition including a fluorescent light-emitting material and a polymer having a conjugating repeat unit and a non-conjugating repeat unit in a backbone of the polymer, and in which the conjugating repeat unit provides at least one conjugation path between repeat units linked to it; the non-conjugating repeat unit reduces conjugation of the polymer as compared to a polymer in which the non-conjugating repeat unit is absent; and a triplet excited state energy level of the light-emitting material is higher than a triplet excited state energy level of the non-conjugating repeat unit.
    Type: Grant
    Filed: October 13, 2011
    Date of Patent: April 20, 2021
    Assignees: Cambridge Display Technology, Ltd., Sumitomo Chemical Company Limited
    Inventors: Natasha M. J. Conway, Jonathan Pillow, Thomas Pounds, Fredrik Jakobsson, Christian Nielsen
  • Organic light-emitting composition, device and method
    Patent number: 10033019
    Abstract: A light-emitting composition comprising a mixture of a fluorescent light-emitting material a triplet-accepting copolymer comprising a triplet-accepting repeat unit and a repeat unit of formula (I): wherein A is a divalent group; R1 independently in each occurrence is a substituent; R2 in each occurrence is H or a substituent; and x independently in each occurrence is 0, 1, 2 or 3.
    Type: Grant
    Filed: November 26, 2013
    Date of Patent: July 24, 2018
    Assignees: Cambridge Display Technology Limited, Sumitomo Chemical Company Limited
    Inventors: Fredrik Jakobsson, Christian Nielsen, Jonathan Pillow, Francesco Distasio, Edward Snedden
  • Fluorene containing copolymer used in light emitting devices
    Patent number: 9676900
    Abstract: A polymer comprising a repeat unit of formula (I): (I) wherein Ar6 and Ar7 each independently represent a substituted or unsubstituted aryl or heteroaryl group; Sp represents a spacer group comprising a chain of at least 2 aliphatic carbon atoms spacing Ar6 from Ar7; m is at least 1; and if m is greater than 1 then —(Ar7)m forms a linear or branched chain of Ar7 groups in which Ar7 in each occurrence may be the same or different.
    Type: Grant
    Filed: January 31, 2012
    Date of Patent: June 13, 2017
    Assignees: Cambridge Display Technology, Ltd., Sumitomo Chemical Company Limited
    Inventors: Sophie Barbara Heidenhain, Matthew Roberts, Michael Cass, Natasha M. J. Conway, Fredrik Jakobsson
  • POLYMER
    Publication number: 20150307652
    Abstract: A polymer comprising a repeat unit of formula (I): (I) wherein Ar6 and Ar7 each independently represent a substituted or unsubstituted aryl or heteroaryl group; Sp represents a spacer group comprising a chain of at least 2 aliphatic carbon atoms spacing Ar6 from Ar7; m is at least 1; and if m is greater than 1 then —(Ar7)m forms a linear or branched chain of Ar7 groups in which Ar7 in each occurrence may be the same or different.
    Type: Application
    Filed: January 31, 2012
    Publication date: October 29, 2015
    Applicants: Sumitomo Chemical Company Limited, Cambridge Display Technology Limited
    Inventors: Sophie Barbara Heidenhain, Mathew Roberts, Micheal Cass, Natasha M.J. Conway, Fredrik Jakobsson
  • ORGANIC LIGHT-EMITTING COMPOSITION, DEVICE AND METHOD
    Publication number: 20140183469
    Abstract: A light-emitting composition comprising a mixture of a fluorescent light-emitting material a triplet-accepting copolymer comprising a triplet-accepting repeat unit and a repeat unit of formula (I): wherein A is a divalent group; R1 independently in each occurrence is a substituent; R2 in each occurrence is H or a substituent; and x independently in each occurrence is 0, 1, 2 or 3.
    Type: Application
    Filed: November 26, 2013
    Publication date: July 3, 2014
    Applicants: Sumitomo Chemical Company Limited, Cambridge Display Technology
    Inventors: Fredrik Jakobsson, Christian Nielsen, Jonathan Pillow, Francesco Distasio, Edwrard Snedden
  • POLYMER AND ORGANIC LIGHT-EMITTING DEVICE
    Publication number: 20130292657
    Abstract: Light-emitting composition and devices including the same, the composition including a fluorescent light-emitting material and a polymer having a conjugating repeat unit and a non-conjugating repeat unit in a backbone of the polymer, and in which the conjugating repeat unit provides at least one conjugation path between repeat units linked to it; the non-conjugating repeat unit reduces conjugation of the polymer as compared to a polymer in which the non-conjugating repeat unit is absent; and a triplet excited state energy level of the light-emitting material is higher than a triplet excited state energy level of the non-conjugating repeat unit.
    Type: Application
    Filed: October 13, 2011
    Publication date: November 7, 2013
    Applicants: Sumitomo Chemical Company Limited, Cambridge Display Technology, Ltd.
    Inventors: Natasha M.J. Conway, Jonathan Pillow, Thomas Pounds, Fredrik Jakobsson, Christian Nielsen