Patents by Inventor Lisa A. Graham

Lisa A. Graham 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).

  • Particle concentrator
    Patent number: 6827761
    Abstract: Particles in a fluid flow are concentrated by a combination of electrical charging and focussing and passage through a virtual impact concentrator. The fluid is passed through an electrical charging section and an electrical focussing section and then to a virtual impact concentrator. The majority of charged particles in a selected size range are collected through a minor discharge passage extending axially from the virtual impact concentrator. The invention is particularly suitable for sampling engine exhaust gases and ambient aerosols.
    Type: Grant
    Filed: February 28, 2003
    Date of Patent: December 7, 2004
    Assignee: Her Majesty The Queen in Right of Canada as represented by the Minister of the Environment
    Inventor: Lisa A. Graham
  • Particle concentrator
    Publication number: 20040011196
    Abstract: Particles in a fluid flow are concentrated by a combination of electrical charging and focussing and passage through a virtual impact concentrator. The fluid is passed through an electrical charging section and an electrical focussing section and then to a virtual impact concentrator. The majority of charged particles in a selected size range are collected through a minor discharge passage extending axially from the virtual impact concentrator. The invention is particularly suitable for sampling engine exhaust gases and ambient aerosols.
    Type: Application
    Filed: February 28, 2003
    Publication date: January 22, 2004
    Inventor: Lisa A. Graham