Patents by Inventor Gilbert W. Burnett

Gilbert W. Burnett 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).

  • Adjustable air filtering device
    Patent number: 5364458
    Abstract: An adjustable filter uses an eight member frame construction to provide a wide range of filter sizes. A panel for encasing one or more layers of filtering materials within the frame is formed from a grid having a border which unevenly encompasses the crossbars of the panel in order to allow various sizes of panels to be formed without producing exposed barbs and without increasing the air resistance of the filter. An embodiment using an electric field is disclosed to enhance the filtering properties of the filter.
    Type: Grant
    Filed: March 18, 1993
    Date of Patent: November 15, 1994
    Assignee: Dust Free, Inc.
    Inventors: Gilbert W. Burnett, Robert B. Holland
  • Multi-sided air filter with wraparound filter media
    Patent number: 5266090
    Abstract: A filtering unit having multiple filtering sides uses one or more filtering elements wrapped around an inner housing containing a blowing device. Outer housing panels are disposed about the filtering elements. The filtering elements and outer housing panels are held in place by one or more stays.
    Type: Grant
    Filed: September 21, 1992
    Date of Patent: November 30, 1993
    Assignee: Dust Free, Inc.
    Inventor: Gilbert W. Burnett
  • Dual-dipole electrostatic air filter
    Patent number: 4902306
    Abstract: A filter assembly (10) for removing particulate matter from air forced therethrough comprises two pairs of oppositely charged woven electrostatic filtering material. Each pair of electrostatic filtering material comprises a positively charged and a negatively charged layer (22, 24, 28 and 30). An open cell foam layer (26) is disposed between the two pairs. Metal grids (20,32) enclose the filtering elements.
    Type: Grant
    Filed: August 9, 1988
    Date of Patent: February 20, 1990
    Assignee: Air Purification Products International, Inc.
    Inventors: Gilbert W. Burnett, Paul D. Jackson
  • Four-sided air filter
    Patent number: 4749390
    Abstract: A filtering unit (10) has four filter holders (20) arranged in a rectangle around a blower (36). Each filter holder holds up to two filter elements (11). The blower draws air through the filter elements (11) and outputs filtered air through a vent (40). Refillable filter frames (16) are provided to allow the user to change the filter material (18). In one embodiment, glass chips are used as the filter material (18).
    Type: Grant
    Filed: February 26, 1987
    Date of Patent: June 7, 1988
    Assignee: Air Purification Products, International
    Inventors: Gilbert W. Burnett, Paul D. Jackson