Title:
HVAC filter
United States Patent D449100
US Patent References:
Method for the manufacture of an electret fibrous filter
van Turnhout - October, 1981 - RE30782

Combined filter and cover unit for an air conditioner
Mack, Jr. - September, 1998 - D397777

SCREEN FILTER PACK AND METHOD FOR MAKING SAME
Perez - July, 1972 - 3679057

AIR CLEANER WITH HINGED SIDE WALLS
Gronholz - January, 1973 - 3712033

PLEATED AIR FILTER CARTRIDGE
Boothe et al. - December, 1974 - 3853529


Inventors:
Sundet, Douglas C. (Hudson, WI)
Pitzen, James F. (Maplewood, MN)
Application Number:
D/128491
Publication Date:
10/09/2001
Filing Date:
08/25/2000
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Assignee:
3M Innovative Properties Company (St. Paul, MN)
Primary Class:
D23/365
Field of Search:
D23/365, 55/DIG.31, 55/486, 55/525
US Patent References:
3941571Filter pleat fold spacerMarch, 1976Getzin
4177050Air filter assemblyDecember, 1979Calbert et al.55D/IG3.1
4199387Air filter fabrication methodApril, 1980Hladik
4210067Method of and apparatus for making air filtersJuly, 1980Evans, Jr.
4547950Method of spacing the folds of a folded filter mediaOctober, 1985Thompson
4731047Apparatus for making filter framesMarch, 1988Lobb
4798575Method and apparatus for the manufacture of filtersJanuary, 1989Siversson
4817942Safety fencing swordApril, 1989Begon
4976677Process for the production of filters, and a filter produced by the processDecember, 1990Siversson
5230800Scrim inserted electrostatic fibrous filter webJuly, 1993Nelson
5389175Method of manufacturing a pleated filter materialFebruary, 1995Wenz
5397632Nonwoven laminated composite article capable or readily undergoing pleating to form a stable pleated depth gaseous filtration mediumMarch, 1995Murphy, Jr. et al.
5505852Filter element for the filtration of fluidsApril, 1996van Rossen
5507847ULPA filterApril, 1996George et al.
5509950Filter device for the filtration of gases and/or fluidsApril, 1996van de Graaf et al.
5512075Folded filter element for filtering fluidApril, 1996Ninomiya et al.
5558689Reinforced filter elementSeptember, 1996Yanagihara et al.
5597645Nonwoven filter media for gasJanuary, 1997Pike et al.
5618324Filter insertApril, 1997Sommer et al.
5704953Forced air system air filterJanuary, 1998Stemmer
5709735High stiffness nonwoven filter mediumJanuary, 1998Midkiff et al.
5779747Flexible folded filter insertJuly, 1998Schlor et al.
5782944Moisture resistant air filterJuly, 1998Justice
5814219Pleated filter having a planar sheet of randomly arranged filaments to maintain pleat spacingSeptember, 1998Friedmann et al.
5817168Aromatic filter systemOctober, 1998Wheless55D/IG3.1
5820644Air filterOctober, 1998Mori et al.
5836861Filter assembly apparatusNovember, 1998Diaz
5868889Process for manufacturing a fluid filterFebruary, 1999Kahler
6039779Filter elementMarch, 2000Butz et al.
Foreign References:
DE1757508April, 1971
FR2217049September, 1974
WO/1998/017368April, 1998HIGH EFFICIENCY PERMANENT AIR FILTER
Primary Examiner:
Lichtenstein, Lisa
Attorney, Agent or Firm:
Patchett, David B.
Claims:
1. The ornamental design for an HVAC filter, as shown and described.

Description:

FIG. 1 is a perspective view of an HVAC filter showing our new design;

FIG. 2 is a front view thereof, the rear view thereof being the same;

FIG. 3 is a top view thereof, the bottom view thereof being the same; and,

FIG. 4 is a side view thereof, the other side thereof being the same.