US6056809A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High efficiency permanent air filter and method of manufacture
Assignee: Individual
•
Filing: 1997-10-15
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Granted: 2000-05-02
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Expires: 2017-10-15
Abstract
Abstract PCT No. PCT/US97/18482 Sec. 371 Date Sep. 18, 1998 Sec. 102(e) Date Sep. 18, 1998 PCT Filed Oct. 15, 1997 PCT Pub. No. WO98/17368 PCT Pub. Date Apr. 30, 1998An air filter for use in residential and commercial heating and air conditioning systems including a laminated unit (100) having a filter media (102) where either side of the filter media (102) has a porous layer (104, 106) of passive electrostatic netting. The air filter has a corrugation configuration (142, 144) to increase the available surface area when compared to conventional flat filters.
Inventors
- 👤 Rick L. Chapman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 10:45
CPC Classifications
B; B01; B01D; B01D46/00; B01D46/10; B01D39/00; B01D39/08; B01D39/083; B01D39/10; B01D39/12; B01D39/14; B01D39/16; B01D39/1607; B01D39/1623; B01D39/163; B01D46/0001; B01D46/0027; B01D46/0032; B01D46/0036; B01D46/52; B01D46/521; B01D46/66; B01D46/79; B01D2239/00; B01D2239/02; B01D2239/0241; B01D2239/04; B01D2239/0435; B01D2239/0442; B01D2239/06; B01D2239/065; B01D2239/0654; B01D2239/0659; B01D2239/0668; B01D2239/0672; B01D2239/0681; B01D2239/069; B01D2239/08; B01D2239/086; B01D2239/12; B01D2239/1233; B01D2239/1291; B01D2275/00; B01D2275/10; B01D2279/00; B01D2279/50; Y; Y10; Y10S; Y10S264/00; Y10S264/48; Y10S55/00; Y10S55/05
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
139 words
A washable air filter for filtering inlet air to a heating and/or air conditioning system comprising an assembly formed of: a deformable, non-electrostatic pad of a high-loft, air laid, resin bonded polymeric fibers having a high filtering efficiency for 10 micron and less particles and having a thickness from 0.05 to 0.45 inches and a density from 0.5 to 5 ounces per yard, said pad having a front surface and a rear surface; a layer of woven, porous, passive electrostatic fabric disposed on either side of the pad having an inside surface in contact with said surfaces, and having an outside surface; a deformable metal grill disposed in contact with the outside surfaces of the fabric; and said assembly having a pleated configuration in which the angle between adjacent wall surfaces of the pleats is from 20° to 75°.
Claim 2
Dependent Claim
139 words
A washable air filter for filtering inlet air to a heating and/or air conditioning system comprising an assembly formed of: a deformable, non-electrostatic pad of a high-loft, air laid, resin bonded polymeric fibers having a high filtering efficiency for 10 micron and less particles and having a thickness from 0.05 to 0.45 inches and a density from 0.5 to 5 ounces per yard, said pad having a front surface and a rear surface; a layer of woven, porous, passive electrostatic fabric disposed on either side of the pad having an inside surface in contact with said surfaces, and having an outside surface; a deformable metal grill disposed in contact with the outside surfaces of the fabric; and said assembly having a pleated configuration in which the angle between adjacent wall surfaces of the pleats is from 20° to 75°.
Claim 3
Dependent Claim
29 words
An air filter according to claim 1 in which the passive electrostatic fabric is a woven fabric selected from the group consisting of a polyalkylene of 1-8 carbon atoms.
Claim 4
Dependent Claim
17 words
An air filter according to claim 2 in which the passive electrostatic fabric is a woven net.
Claim 5
Dependent Claim
16 words
An air filter according to claim 2 in which the passive electrostatic woven fabric comprises polypropylene.
Claim 6
Dependent Claim
22 words
An air filter according to claim 4 in which the woven fabric has a thickness of from 0.01 inch to 0.1 inch.
Claim 7
Dependent Claim
14 words
An air filter according to claim 2 in which the polymeric fibers are polyester.
Claim 8
Dependent Claim
16 words
An air filter according to claim 6 in which the bonding resin is an acrylic resin.
Claim 9
Dependent Claim
23 words
An air filter according to claim 7 in which the filter has a periphery and further including a stiff frame engaging said periphery.
Claim 10
Dependent Claim
16 words
An air filter according to claim 8 in which said filter is stitched about said periphery.
Claim 11
Dependent Claim
20 words
A filter according to claim 3 in which the thickness of the net material is from 0.02 to 0.06 inches.
Claim 12
Dependent Claim
21 words
A filter according to claim 10 in which the woven net has a weave which appears to have a honeycomb structure.
Claim 13
Dependent Claim
21 words
A filter according to claim 1 in which the filter has an efficiency for 0.3 micron particles of at least 6.8%.
Claim 14
Dependent Claim
77 words
A method of filtering inlet air to an air conditioning and heating system with a permanent filter comprising the steps of: placing a washable filter as defined in claim 1 in the path of the inlet air; capturing particles from the inlet air onto the filter pad; removing the filter from the path of the inlet air; washing the filter pad to remove the particles; and repositioning the filter in the path of the inlet air stream.
Claim 15
Independent Claim
118 words
A method of manufacturing a washable filter for filtering inlet air flow to a heating and/or air conditioning system, comprising the steps of: placing a sheet of passive electrostatic netting woven from polyalkylene fibers in contact with the surfaces of a non-electrostatic pad of a high-loft, air laid, resin bonded, polymeric fibers having a thickness from 0.05 to 0.45 inch and a density from 0.5 to 5 ounces per yard and a high efficiency for 10 micron or less particles; placing a layer of porous metal in contact with the outer surfaces of the netting to form an assembly; and pleating said assembly to form pleats in which the angle between wall surfaces is from 20° to 75°.
Claim 16
Independent Claim
118 words
A method of manufacturing a washable filter for filtering inlet air flow to a heating and/or air conditioning system, comprising the steps of: placing a sheet of passive electrostatic netting woven from polyalkylene fibers in contact with the surfaces of a non-electrostatic pad of a high-loft, air laid, resin bonded, polymeric fibers having a thickness from 0.05 to 0.45 inch and a density from 0.5 to 5 ounces per yard and a high efficiency for 10 micron or less particles; placing a layer of porous metal in contact with the outer surfaces of the netting to form an assembly; and pleating said assembly to form pleats in which the angle between wall surfaces is from 20° to 75°.
Claim 17
Dependent Claim
28 words
A method according to claim 14 in which the passive electrostatic netting is a woven fabric selected from the group consisting of a polyalkylene of 1-8 carbon atoms.
Claim 18
Dependent Claim
16 words
A method according to claim 15 in which the passive electrostatic woven fabric consists of polypropylene.
Claim 19
Dependent Claim
21 words
A method according to claim 16 in which the woven fabric has a thickness of from 0.01 inch to 0.1 inch.
Claim 20
Dependent Claim
13 words
A method according to claim 17 in which the polymeric fibers are polyester.
Claim 21
Dependent Claim
15 words
A method according to claim 18 in which the bonding resin is an acrylic resin.
Claim 22
Dependent Claim
26 words
A method according to claim 14 in which said filter has a periphery and further including the step of encasing said periphery in a metal frame.
Claim 23
Dependent Claim
17 words
A method according to claim 20 further including the step of stitching said filter about said periphery.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2003-05-02 | 2003-11-01 | 2004-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2007-05-02 | 2007-11-01 | 2008-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2011-05-02 | 2011-11-01 | 2012-05-02 | $7700.00 | Window Closed / Lapsed |