Patents by Inventor Ahalapitiya H. Jayatissa

Ahalapitiya H. Jayatissa 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).

  • Chlorine gas sensing system
    Patent number: 8414831
    Abstract: A chlorine gas sensor system includes carbon nanotubes at least partially coated with a metal oxide deposited on a substrate, and a source of infra-red light positioned to illuminate at least a portion of the coated nanotubes.
    Type: Grant
    Filed: June 10, 2009
    Date of Patent: April 9, 2013
    Assignee: The University of Toledo
    Inventor: Ahalapitiya H. Jayatissa
  • CHLORINE GAS SENSING SYSTEM
    Publication number: 20110297541
    Abstract: A chlorine gas sensor system includes carbon nanotubes at least partially coated with a metal oxide deposited on a substrate, and a source of infra-red light positioned to illuminate at least a portion of the coated nanotubes.
    Type: Application
    Filed: June 10, 2009
    Publication date: December 8, 2011
    Inventor: Ahalapitiya H. Jayatissa
  • High Throughput Carbon Nanotube Growth System, and Carbon Nanotubes and Carbon Nanofibers Formed Thereby
    Publication number: 20110020211
    Abstract: A system is provided for forming carbon nanotubes comprising growing carbon nanotubes using a hot filament CVD system.
    Type: Application
    Filed: March 9, 2009
    Publication date: January 27, 2011
    Applicant: UNIVERSITY OF TOLEDO
    Inventor: Ahalapitiya H. Jayatissa
  • Method of forming carbon nanotubes and apparatus therefor
    Patent number: 6699525
    Abstract: Carbon nanotubes are formed on a substrate by providing a coiled filament in a chemical vapor deposition chamber, supporting a substrate having a catalytic coating provided thereon inside the coiled filament, evacuating air, if present, from the chamber, heating the filament and applying a bias voltage between the filament and the substrate, introducing a reactant gas into the chamber, and pyrolyzing the reactant gas to deposit the carbon nanotubes on the catalytic coating. The substrate can be in the form of a rod or fiber and the carbon nanotubes can be deposited in a radially extending cluster on the substrate. The present invention also contemplates an apparatus for carrying out the inventive method.
    Type: Grant
    Filed: April 16, 2001
    Date of Patent: March 2, 2004
    Assignee: The Board of Trustees of Western Michigan University
    Inventor: Ahalapitiya H. Jayatissa
  • Method of forming carbon nanotubes and apparatus therefor
    Publication number: 20020150684
    Abstract: Carbon nanotubes are formed on a substrate by providing a coiled filament in a chemical vapor deposition chamber, supporting a substrate having a catalytic coating provided thereon inside the coiled filament, evacuating air, if present, from the chamber, heating the filament and applying a bias voltage between the filament and the substrate, introducing a reactant gas into the chamber, and pyrolyzing the reactant gas to deposit the carbon nanotubes on the catalytic coating. The substrate can be in the form of a rod or fiber and the carbon nanotubes can be deposited in a radially extending cluster on the substrate. The present invention also contemplates an apparatus for carrying out the inventive method.
    Type: Application
    Filed: April 16, 2001
    Publication date: October 17, 2002
    Inventor: Ahalapitiya H. Jayatissa