Patents by Inventor Bhupesh Chandra

Bhupesh Chandra 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).

  • OHMIC CONTACT BETWEEN THIN FILM SOLAR CELL AND CARBON-BASED TRANSPARENT ELECTRODE
    Publication number: 20120325305
    Abstract: A photovoltaic device and method include a photovoltaic stack having an N-doped layer, a P-doped layer and an intrinsic layer. A transparent electrode is formed on the photovoltaic stack and includes a carbon based layer and a high work function metal layer. The high work function metal layer is disposed at an interface between the carbon based layer and the P-doped layer such that the high work function metal layer forms a reduced barrier contact and is light transmissive.
    Type: Application
    Filed: June 21, 2011
    Publication date: December 27, 2012
    Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: BHUPESH CHANDRA, Augustin J. Hong, Jeehwan Kim, Devendra K. Sadana, George S. Tulevski
  • Doped Carbon Nanotubes and Transparent Conducting Films Containing the Same
    Publication number: 20120282395
    Abstract: Transparent conducting electrodes include a doped single walled carbon nanotube film and methods for forming the doped single walled carbon nanotube (SWCNT) by solution processing. The method generally includes depositing single walled carbon nanotubes dispersed in a solvent and a surfactant onto a substrate to form a single walled carbon nanotube film thereon; removing all of the surfactant from the carbon nanotube film; and exposing the single walled carbon nanotube film to a single electron oxidant in a solution such that one electron is transferred from the single walled carbon nanotubes to each molecule of the single electron oxidant.
    Type: Application
    Filed: July 18, 2012
    Publication date: November 8, 2012
    Applicants: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Mostafa M. El-Ashry, Ali Afzali-Ardakani, Bhupesh Chandra, George S. Tulevski
  • Doped Carbon Nanotubes and Transparent Conducting Films Containing the Same
    Publication number: 20120052308
    Abstract: Transparent conducting electrodes include a doped single walled carbon nanotube film and methods for forming the doped single walled carbon nanotube (SWCNT) by solution processing. The method generally includes depositing single walled carbon nanotubes dispersed in a solvent and a surfactant onto a substrate to form a single walled carbon nanotube film thereon; removing all of the surfactant from the carbon nanotube film; and exposing the single walled carbon nanotube film to a single electron oxidant in a solution such that one electron is transferred from the single walled carbon nanotubes to each molecule of the single electron oxidant.
    Type: Application
    Filed: September 1, 2010
    Publication date: March 1, 2012
    Applicants: EGYPT NANOTECHNOLOGY CENTER, INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Mostafa M. El-Ashry, Ali Afzali-Ardakani, Bhupesh Chandra, George S. Tulevski
  • Substituted tetrahydropyridin derivatives, method of preparation and pharmaceutical compositions containing them
    Patent number: 6232319
    Abstract: The invention relates to compounds of general formula (I): in which R, R1, R2, X and Y are as defined in the description, their geometrical and/or optical isomers, and their addition salts with a pharmaceutically-acceptable acid or base, as well as to medicaments containing the same.
    Type: Grant
    Filed: June 4, 1999
    Date of Patent: May 15, 2001
    Assignee: Adir et Compagnie
    Inventors: Christian Marazano, Delphine Compere, Bhupesh Chandra Das, Jean Lepagnol