Air filter
United States Patent D732153

Sanocki, Stephen M. (Hudson, WI, US)
Enstrom, Christopher K. (Eagan, MN, US)
Gregerson, Glen O. (Hudson, WI, US)
Johnson, Daniel E. (Marine On St. Croix, MN, US)
Fox, Andrew R. (Oakdale, MN, US)
Application Number:
Publication Date:
Filing Date:
Primary Class:
International Classes:
(IPC1-7): 2302
Field of Search:
D23/365, D23/209, D23/363, D23/358, D23/386, D23/354, D23/341, D23/364, 55/385.3, 55/502, 55/497, 55/506, 55/505, 55/521, 55/495, 55/422, 55/493, 55/DIG.30, 210/435, 210/130, 210/136, 210/248, 210/339, 210/448, 210/452, 210/497.1, D32/31, D15/5
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US Patent References:
8741018Filter cartridge with centerboard, dust collectors, and methodsJune, 2014Belcher et al.55/498
D679792Scented air filterApril, 2013HollingsworthD23/365
8353975Process for producing a fleece having metallic wire filaments, process for producing honeycomb body having at least one fleece, fleece, honeycomb body, apparatus and vehicleJanuary, 2013Brück
8197571Air filter with improved structural supportJune, 2012Porter
D634413Air conditioner unit screening deviceMarch, 2011WallaceD23/354
D618779Air filterJune, 2010Jenkins
20090301044AIR FILTER FRAMEDecember, 2009Miller
D605274Air filterDecember, 2009Kawano et al.D23/365
7517378Integral rigid edging for synthetic air filtersApril, 2009Knapp
D548826Air cleaner for internal-combustion engineAugust, 2007Katta
D544949Air filterJune, 2007Winters et al.D23/365
7118610Foldable filter frameOctober, 2006Lipner
7070641Carbon media filter elementJuly, 2006Gunderson et al.55/497
7052565Web constructions with severed elongate strandsMay, 2006Seth
6537935High strength nonwoven fabric and process for makingMarch, 2003Seth
6464745Minipleat synthetic air filter assemblyOctober, 2002Rivera
D449098Fan filterOctober, 2001Reede
D449100HVAC filterOctober, 2001Sundet
6280824Contoured layer channel flow filtration mediaAugust, 2001Insley
6209724Package and dispenser for glass fiber filter padApril, 2001Miller
D435640Combined cartridge filter and tube frame structureDecember, 2000OussorenD23/365
6033454Air filter assemblyMarch, 2000Hoeffken
D402356Combined filter and frame thereforDecember, 1998Hodge
5810898Nestable pleated filterSeptember, 1998Miller
5800588Nestable, rigid filter frameSeptember, 1998Miller
5704953Forced air system air filterJanuary, 1998Stemmer
5681302Elastic sheet-like compositeOctober, 1997Melbye
5620545Method of making a corrugated nonwoven web of polymeric microfiberApril, 1997Braun
5525145Filtering apparatus for a forced air duct grillJune, 1996Hodge
5342423Air filter for an HVAC system and method of manufacturing sameAugust, 1994Taft
5256231Method for making a sheet of loop materialOctober, 1993Gorman
5230455Self-supporting filter unitsJuly, 1993Price226/88
D336678Grease filterJune, 1993Finkelstein et al.D23/209
4636233Filter assemblyJanuary, 1987Lizmore
4464187Nesting air filtersAugust, 1984Kershaw
4420315Nesting air filtersDecember, 1983Kershaw
4372763Air filter assemblyFebruary, 1983Champlin
4105423Compact air filter with tubular frameAugust, 1978Latakas
4086071Air filter assemblyApril, 1978Champlin
4002034Matting for the prevention of hydraulic erosionJanuary, 1977Mühring
3830045COMPACT AIR FILTERAugust, 1974Copenhefer
3411272Automatic fluid bypass sensing, actuating, and indicating systemNovember, 1968Carmon96/418
3401803Filter formed from corrugated and flat sheetsSeptember, 1968Bub210/488
3023839Fibrous glass air filtersMarch, 1962Best

Other References:
U.S. Appl. No. 29/424,105, filed Jun. 7, 2012 entitled “Air Filter”.
Primary Examiner:
Muller, David
Attorney, Agent or Firm:
Hass, Irina

1. The ornamental design for an air filter, as shown and described.


FIG. 1 is a perspective view showing the new design for an air filter;

FIG. 2 is a top view thereof;

FIG. 3 is a bottom view thereof;

FIG. 4 is a front view thereof; and,

FIG. 5 is a side view thereof.

The portions in the drawing views shown in broken lines form no part of the claimed design. In addition, the dot-dash-dot type broken lines shown in the drawing views define the boundaries of the claimed design and form no part of the claimed design.