Patents by Inventor Bonnie-Lou Griffiths

Bonnie-Lou Griffiths 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).

  • Disposable filtration system for bagless vacuum cleaners
    Patent number: 7329293
    Abstract: According to the present invention, a bagless vacuum cleaner includes a dust chamber, a primary filter and a second filter. The dust chamber includes an entrance and an exit. The primary filter is disposed in the dust chamber between the entrance and the exit and the second filter is disposed between the entrance and the primary filter. The second filter removes at least some contaminants from the air passing through the entrance. A user can selectively replace the second filter with a new second filter.
    Type: Grant
    Filed: July 1, 2004
    Date of Patent: February 12, 2008
    Inventor: Bonnie-Lou Griffiths
  • Disposable filtration system for bagless vacuum cleaners
    Publication number: 20050066638
    Abstract: According to the present invention, a bagless vacuum cleaner includes a dust chamber, a primary filter and a second filter. The dust chamber includes an entrance and an exit. The primary filter is disposed in the dust chamber between the entrance and the exit and the second filter is disposed between the entrance and the primary filter. The second filter removes at least some contaminants from the air passing through the entrance. A user can selectively replace the second filter with a new second filter.
    Type: Application
    Filed: July 1, 2004
    Publication date: March 31, 2005
    Inventor: Bonnie-Lou Griffiths