Patents by Inventor Nalinkumar L. Patel

Nalinkumar L. Patel 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).

  • Optical device comprising a charge transport layer of insoluble organic material and method for the production thereof
    Patent number: 8974917
    Abstract: A method of forming an organic light emitting diode comprising the steps of: providing a substrate comprising a first electrode for injection of charge carriers of a first type; forming a charge transporting layer by depositing over the substrate a charge transporting material for transporting charge carriers of the first type, the charge transporting material being soluble in a solvent; treating the charge transporting layer to render it insoluble in the solvent; forming an electroluminescent layer by depositing onto the charge transporting layer a composition comprising the solvent, a phosphorescent material, and a host material; and depositing over the electroluminescent layer a second electrode for injection of charge carriers of a second type.
    Type: Grant
    Filed: December 20, 2004
    Date of Patent: March 10, 2015
    Assignee: Cambridge Display Technology Limited
    Inventors: Nalinkumar L. Patel, Natasha M. Conway, Mark Leadbeater, Ilaria Grizzi
  • Electroluminescent device
    Patent number: 8216874
    Abstract: An optical device comprising an anode, a cathode comprising barium, strontium or calcium, and a layer of organic semiconducting material between the anode and the cathode wherein a layer of hole transporting and electron blocking material is located between the anode and the layer of organic semiconducting material.
    Type: Grant
    Filed: April 30, 2009
    Date of Patent: July 10, 2012
    Assignee: Cambridge Display Technology Limited
    Inventors: Brian Tierney, Ilaria Grizzi, Clare Louise Foden, Nalinkumar L. Patel, Mark Leadbeater
  • Optical device comprising a charge transport layer of insoluble organic material and method for the production thereof
    Publication number: 20090174311
    Abstract: A method of forming an organic light emitting diode comprising the steps of: providing a substrate comprising a first electrode for injection of charge carriers of a first type; forming a charge transporting layer by depositing over the substrate a charge transporting material for transporting charge carriers of the first type, the charge transporting material being soluble in a solvent; treating the charge transporting layer to render it insoluble in the solvent; forming an electroluminescent layer by depositing onto the charge transporting layer a composition comprising the solvent, a phosphorescent material, and a host material; and depositing over the electroluminescent layer a second electrode for injection of charge carriers of a second type.
    Type: Application
    Filed: December 20, 2004
    Publication date: July 9, 2009
    Applicant: CAMBRIDGE DISPLAY TECHNOLOGY LIMITED
    Inventors: Nalinkumar L. Patel, Natasha M. Conway, Mark Leadbeater, Ilaria Grizzi