Patents by Inventor Neetu Chopra

Neetu Chopra 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).

  • Patent number: 10217938
    Abstract: A composition comprising: at least one compound comprising a hole transporting core, wherein the core is covalently bonded to a first arylamine group and also covalently bonded to a second arylamine group different from the first, and wherein the compound is covalently bonded to at least one intractability group, wherein the intractability group is covalently bonded to the hole transporting core, the first arylamine group, the second arylamine group, or a combination thereof, and wherein the compound has a molecular weight of about 5,000 g/mole or less. Blended mixtures of arylamine compounds, including fluorene core compounds, can provide good film formation and stability when coated onto hole injection layers. Solution processing of OLEDs is a particularly important application.
    Type: Grant
    Filed: January 19, 2017
    Date of Patent: February 26, 2019
    Assignee: NISSAN CHEMICAL INDUSTRIES, LTD.
    Inventors: Christopher T. Brown, Neetu Chopra, Christopher R. Knittel, Mathew Mathai, Venkataramanan Seshadri, Jing Wang, Brian Woodworth
  • Patent number: 9978473
    Abstract: A method including combining at least one first compound in a neutral form with at least one ionic dopant in a first solvent system to provide a first doped reaction product, isolating the first doped reaction product in solid form, and combining the isolated first doped reaction product with at least one conjugated polymer in neutral form in a second solvent system to form a second doped reaction product including an oxidized form of the conjugated polymer a neutral form of the first compound is described. Advantages include better stability, ease of use, and lower metal content. Applications include organic electronic devices including OLEDs.
    Type: Grant
    Filed: October 3, 2012
    Date of Patent: May 22, 2018
    Assignee: NISSAN CHEMICAL INDUSTRIES, LTD.
    Inventors: Venkataramanan Seshadri, Neetu Chopra
  • Publication number: 20170186953
    Abstract: A composition comprising: at least one compound comprising a hole transporting core, wherein the core is covalently bonded to a first arylamine group and also covalently bonded to a second arylamine group different from the first, and wherein the compound is covalently bonded to at least one intractability group, wherein the intractability group is covalently bonded to the hole transporting core, the first arylamine group, the second arylamine group, or a combination thereof, and wherein the compound has a molecular weight of about 5,000 g/mole or less. Blended mixtures of arylamine compounds, including fluorene core compounds, can provide good film formation and stability when coated onto hole injection layers. Solution processing of OLEDs is a particularly important application.
    Type: Application
    Filed: January 19, 2017
    Publication date: June 29, 2017
    Inventors: Christopher T. BROWN, Neetu Chopra, Christopher R. Knittel, Mathew Mathai, Venkataramanan Seshadri, Jing Wang, Brian Woodworth
  • Patent number: 9577194
    Abstract: A composition comprising: at least one compound comprising a hole transporting core, wherein the core is covalently bonded to a first arylamine group and also covalently bonded to a second arylamine group different from the first, and wherein the compound is covalently bonded to at least one intractability group, wherein the intractability group is covalently bonded to the hole transporting core, the first arylamine group, the second arylamine group, or a combination thereof, and wherein the compound has a molecular weight of about 5,000 g/mole or less. Blended mixtures of arylamine compounds, including fluorene core compounds, can provide good film formation and stability when coated onto hole injection layers. Solution processing of OLEDs is a particularly important application.
    Type: Grant
    Filed: July 1, 2011
    Date of Patent: February 21, 2017
    Assignee: NISSAN CHEMICAL INDUSTRIES, LTD.
    Inventors: Christopher T. Brown, Neetu Chopra, Christopher R. Knittel, Mathew Mathai, Venkataramanan Seshadri, Jing Wang, Brian Woodworth
  • Patent number: 9397294
    Abstract: Improved OLED devices and methods of making the same using vertical phase separation to simplify processing. Vertically phase separated material can include at least one lower first layer disposed on the electrode, and at least one upper second layer different from the first layer and disposed away from the electrode or optionally on one layer comprising at least one semiconducting organic material. The first layer can be enriched with at least one first semiconducting organic material (SOM 1) and the second layer can be enriched with at least one second semiconducting organic material (SOM 2) different from the SOM 1. The ink composition can be adapted so that the film vertically phase separates into the first and second layers. Compositions and devices are also embodied herein.
    Type: Grant
    Filed: June 29, 2012
    Date of Patent: July 19, 2016
    Assignee: SOLVAY USA, INC.
    Inventors: Christopher T. Brown, Neetu Chopra, Venkataramanan Seshadri, Jing Wang
  • Patent number: 8815639
    Abstract: A composition comprising: at least one compound comprising a hole transporting core, wherein the core is covalently bonded to a first arylamine group and also covalently bonded to a second arylamine group different from the first, and wherein the compound is covalently bonded to at least one intractability group, wherein the intractability group is covalently bonded to the hole transporting core, the first arylamine group, the second arylamine group, or a combination thereof, and wherein the compound has a molecular weight of about 5,000 g/mole or less. Blended mixtures of arylamine compounds, including fluorene core compounds, can provide good film formation and stability when coated onto hole injection layers. Solution processing of OLEDs is a particularly important application.
    Type: Grant
    Filed: April 23, 2013
    Date of Patent: August 26, 2014
    Assignee: Solvay USA, Inc.
    Inventors: Christopher T. Brown, Neetu Chopra, Christopher Knittel, Mathew Mathai, Venkataramanan Seshadri, Jing Wang, Brian Woodworth
  • Patent number: 8535974
    Abstract: A composition comprising: at least one compound comprising a hole transporting core, wherein the core is covalently bonded to a first arylamine group and also covalently bonded to a second arylamine group different from the first, and wherein the compound is covalently bonded to at least one intractability group, wherein the intractability group is covalently bonded to the hole transporting core, the first arylamine group, the second arylamine group, or a combination thereof, and wherein the compound has a molecular weight of about 5,000 g/mole or less. Blended mixtures of arylamine compounds, including fluorene core compounds, can provide good film formation and stability when coated onto hole injection layers. Solution processing of OLEDs is a particularly important application.
    Type: Grant
    Filed: July 1, 2011
    Date of Patent: September 17, 2013
    Assignee: Plextronics, Inc.
    Inventors: Christopher T. Brown, Neetu Chopra, Christopher R. Knittel, Mathew Mathai, Venkataramanan Seshadri, Jing Wang, Brian Woodworth
  • Publication number: 20130009137
    Abstract: Improved OLED devices and methods of making the same using vertical phase separation to simplify processing. Vertically phase separated material can include at least one lower first layer disposed on the electrode, and at least one upper second layer different from the first layer and disposed away from the electrode or optionally on one layer comprising at least one semiconducting organic material. The first layer can be enriched with at least one first semiconducting organic material (SOM 1) and the second layer can be enriched with at least one second semiconducting organic material (SOM 2) different from the SOM 1. The ink composition can be adapted so that the film vertically phase separates into the first and second layers. Compositions and devices are also embodied herein.
    Type: Application
    Filed: June 29, 2012
    Publication date: January 10, 2013
    Inventors: Christopher T. Brown, Neetu Chopra, Venkataramanan Seshadri, Jing Wang
  • Publication number: 20120003790
    Abstract: A composition comprising: at least one compound comprising a hole transporting core, wherein the core is covalently bonded to a first arylamine group and also covalently bonded to a second arylamine group different from the first, and wherein the compound is covalently bonded to at least one intractability group, wherein the intractability group is covalently bonded to the hole transporting core, the first arylamine group, the second arylamine group, or a combination thereof, and wherein the compound has a molecular weight of about 5,000 g/mole or less. Blended mixtures of arylamine compounds, including fluorene core compounds, can provide good film formation and stability when coated onto hole injection layers. Solution processing of OLEDs is a particularly important application.
    Type: Application
    Filed: July 1, 2011
    Publication date: January 5, 2012
    Inventors: Christopher T. Brown, Neetu Chopra, Christopher R. Knittel, Mathew Mathai, Venkataramanan Seshadri, Jing Wang, Brian Woodworth
  • Publication number: 20120001127
    Abstract: A composition comprising: at least one compound comprising a hole transporting core, wherein the core is covalently bonded to a first arylamine group and also covalently bonded to a second arylamine group different from the first, and wherein the compound is covalently bonded to at least one intractability group, wherein the intractability group is covalently bonded to the hole transporting core, the first arylamine group, the second arylamine group, or a combination thereof, and wherein the compound has a molecular weight of about 5,000 g/mole or less. Blended mixtures of arylamine compounds, including fluorene core compounds, can provide good film formation and stability when coated onto hole injection layers. Solution processing of OLEDs is a particularly important application.
    Type: Application
    Filed: July 1, 2011
    Publication date: January 5, 2012
    Inventors: Christopher T. Brown, Neetu Chopra, Christopher R. Knittel, Mathew Mathai, Venkataramanan Seshadri, Jing Wang, Brian Woodworth