Adjustable air filtering device
Patent 5364458 Issued on November 15, 1994. Estimated Expiration Date: 
March 18, 2013. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
March 18, 2013. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 1122437 2175903 2565698 2624405 2981367 3280984 3675402 3735560 3763633 Electronic air filter InventorsAssigneeApplicationNo. 033041 filed on 03/18/1993US Classes:96/55, And serially arranged nonelectrical separator55/496, With adjustable connector or size adjusting means96/68, Particle type collector96/80With details of voltage supply means or circuitryExaminersPrimary: Chiesa, Richard L.Attorney, Agent or FirmForeign Patent References
International ClassB03C 003/14AbstractAn 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.Other References
Field of SearchWith adjustable connector or size adjusting meansAnd nonelectrical separation of fluid mixture Distinct separation step precedes electric or electrostatic treatment Distinct separation step follows electric or electrostatic treatment Electric charge produced by friction (e.g., by gas flow, etc.) And serially arranged nonelectrical separator Precedent nonelectrical separator Separator is single porous filter Total flow of gaseous fluid mixture through porous collector electrode Total flow of gaseous fluid mixture through interstitial or porous collector Collecting electrode modifies gas flow Particle type collector With details of voltage supply means or circuitry | |
