Patents by Inventor David Mohamad

David Mohamad 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).

  • Organic light emitting polymer comprising light-emitting repeat unit in backbone of polymer and device therewith
    Patent number: 11788001
    Abstract: A light-emitting polymer comprising a light-emitting repeat unit in a backbone of the polymer, wherein the polymer has an anisotropy of no more than 0.8 and wherein a transition dipole moment of the light-emitting repeat unit is aligned with the polymer backbone.
    Type: Grant
    Filed: November 24, 2020
    Date of Patent: October 17, 2023
    Assignee: Sumitomo Chemical Company Limited
    Inventors: Ruth Pegington, Michael Cass, David Mohamad, Matthew Roberts, William Tarran, Martin Humphries
  • Organic light-emitting device
    Patent number: 11024818
    Abstract: Organic Light-Emitting Device An organic light-emitting device (100) comprising an anode (103); a cathode (109); a light-emitting layer (107) between the anode and the cathode; and a hole-transporting layer (105) between the anode and the cathode, wherein the light-emitting layer comprises a light-emitting compound of formula (I) and the hole-transporting layer comprises a hole-transporting material having a HOMO level that is no more than 5.1 e V from vacuum level: N N ML x R 2 (R) m (R) n y (I) wherein: R in each occurrence is independently a substituent; R 2 is H or a substituent; m is 0, 1 or 2; n is 0, 1, 2, 3 or 4; M is a transition metal; L is a ligand; y is at least 1; and x is 0 or a positive integer.
    Type: Grant
    Filed: December 1, 2015
    Date of Patent: June 1, 2021
    Assignees: Cambridge Display Technology Limited, Sumitomo Chemical Company Limited
    Inventors: Simon King, David Mohamad
  • ORGANIC LIGHT EMITTING POLYMER COMPRISING LIGHT-EMITTING REPEAT UNIT IN BACKBONE OF POLYMER AND DEVICE THEREWITH
    Publication number: 20210079296
    Abstract: A light-emitting polymer comprising a light-emitting repeat unit in a backbone of the polymer, wherein the polymer has an anisotropy of no more than 0.8 and wherein a transition dipole moment of the light-emitting repeat unit is aligned with the polymer backbone.
    Type: Application
    Filed: November 24, 2020
    Publication date: March 18, 2021
    Applicants: Cambridge Display Technology Limited, Sumitomo Chemical Company Limited
    Inventors: Ruth Pegington, Michael Cass, David Mohamad, Matthew Roberts, William Tarran, Martin Humphries
  • Organic light emitting polymer comprising light-emitting repeat unit in backbone of polymer and device therewith
    Patent number: 10870796
    Abstract: A light-emitting polymer comprising a light-emitting repeat unit in a backbone of the polymer, wherein the polymer has an anisotropy of no more than 0.8 and wherein a transition dipole moment of the light-emitting repeat unit is aligned with the polymer backbone.
    Type: Grant
    Filed: February 18, 2016
    Date of Patent: December 22, 2020
    Assignees: Cambridge Display Technology Limited, Sumitomo Chemical Company Limited
    Inventors: Ruth Pegington, Michael Cass, David Mohamad, Matthew Roberts, William Tarran, Martin Humphries
  • ORGANIC LIGHT EMITTING POLYMER COMPRISING LIGHT-EMITTING REPEAT UNIT IN BACKBONE OF POLYMER AND DEVICE THEREWITH
    Publication number: 20180037812
    Abstract: A light-emitting polymer comprising a light-emitting repeat unit in a backbone of the polymer, wherein the polymer has an anisotropy of no more than 0.8 and wherein a transition dipole moment of the light-emitting repeat unit is aligned with the polymer backbone.
    Type: Application
    Filed: February 18, 2016
    Publication date: February 8, 2018
    Applicants: Cambridge Display Technology Limited, Sumitomo Chemical Company Limited
    Inventors: Ruth Pegington, Michael Cass, David Mohamad, Matthew Roberts, William Tarran, Martin Humphries
  • ORGANIC LIGHT-EMITTING DEVICE
    Publication number: 20170365805
    Abstract: Organic Light-Emitting Device An organic light-emitting device (100) comprising an anode (103); a cathode (109); a light-emitting layer (107) between the anode and the cathode; and a hole-transporting layer (105) between the anode and the cathode, wherein the light-emitting layer comprises a light-emitting compound of formula (I) and the hole-transporting layer comprises a hole-transporting material having a HOMO level that is no more than 5.1 e V from vacuum level: N N ML x R 2 (R) m (R) n y (I) wherein: R in each occurrence is independently a substituent; R 2 is H or a substituent; m is 0, 1 or 2; n is 0, 1, 2, 3 or 4; M is a transition metal; L is a ligand; y is at least 1; and x is 0 or a positive integer.
    Type: Application
    Filed: December 1, 2015
    Publication date: December 21, 2017
    Applicants: Cambridge Display Technology Limited, Sumitomo Chemical Company Limited
    Inventors: Simon King, David Mohamad
  • Organic light-emitting device
    Patent number: 9099666
    Abstract: An organic light-emitting device comprising an anode; a cathode; a first light-emitting layer between the anode and the cathode; and a second light-emitting layer between the first light-emitting layer and the cathode, wherein: the first light-emitting layer comprises a hole-transporting material and a first phosphorescent material, the second light-emitting layer comprises a second phosphorescent material; and the lowest triplet excited state energy level of the hole-transporting material is: (a) lower than the lowest triplet excited state of the second phosphorescent material, and (b) the same as or higher than the lowest triplet excited state energy level of the first phosphorescent material.
    Type: Grant
    Filed: June 5, 2014
    Date of Patent: August 4, 2015
    Assignees: Cambridge Display Technology, Ltd., Sumitomo Chemical Company Limited
    Inventors: Simon King, David Mohamad
  • ORGANIC LIGHT-EMITTING DEVICE
    Publication number: 20140361274
    Abstract: An organic light-emitting device comprising an anode; a cathode; a first light-emitting layer between the anode and the cathode; and a second light-emitting layer between the first light-emitting layer and the cathode, wherein: the first light-emitting layer comprises a hole-transporting material and a first phosphorescent material, the second light-emitting layer comprises a second phosphorescent material; and the lowest triplet excited state energy level of the hole-transporting material is: (a) lower than the lowest triplet excited state of the second phosphorescent material, and (b) the same as or higher than the lowest triplet excited state energy level of the first phosphorescent material.
    Type: Application
    Filed: June 5, 2014
    Publication date: December 11, 2014
    Applicants: Cambridge Display Technology, Ltd., Sumitomo Chemical Company Limited
    Inventors: Simon King, David Mohamad