Title:
Air filter
United States Patent D831182


Inventors:
Gregerson, Glen O. (Hudson, WI, US)
Lise, Jonathan M. (Woodbury, MN, US)
Application Number:
29/568536
Publication Date:
10/16/2018
Filing Date:
06/20/2016
Assignee:
3M INNOVATIVE PROPERTIES COMPANY (St. Paul, MN, US)
Primary Class:
International Classes:
(IPC1-7): 2304
Field of Search:
D23/200, D23/259, D23/314, D23/325, D23/333-336, D23/355-365, D23/386-388
View Patent Images:
US Patent References:
9174159Framed pleated air filter with upstream bridging filamentsNovember, 2015Sanocki
D732153Air filterJune, 2015Sanocki
D725390Sheet materialMarch, 2015Sanocki
D599465Vent coverSeptember, 2009MitchellD23/388
D499177Filter element having oval shapeNovember, 2004KosmiderD23/365
D475129Radial seal filter element with press-on fin structureMay, 2003WardD23/365
D403418Filter basin, which can hold silt-collecting sock and sorbent materialDecember, 1998BrinkmanD23/355
D378852Floor registerApril, 1997SmolarskiD23/388
5542454Free flow low energy pipe protectorAugust, 1996Carlson138/108
5038834Encasing tubing having continuous bonding enhancing propertiesAugust, 1991Siegfried138/103
4421202Sound attenuatorDecember, 1983Hoy138/130
4225442Core spun filtration rovingSeptember, 1980Tremblay210/457
D254506Corrugated metal sheet contact body for humidifiersMarch, 1980Holmberg261/112.2
3624764VIBRATION ISOLATION MOUNT AND SHOCK ABSORBERNovember, 1971Goben188/377



Other References:
Pleated filter reference found online [Jan. 11, 2017] http://furnacefiltercare.com/residential/pleated-filters/.
Trademark Application Serial No. 86-935,298, filed Mar. 10, 2016.
Trademark Application Serial No. 86-912,631, filed Feb. 18, 2016.
Primary Examiner:
Spear, Robert M.
Assistant Examiner:
Voytek, John A.
Attorney, Agent or Firm:
Nowak, Sandra K.
Claims:
CLAIM

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

Description:

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 side view thereof;

FIG. 5 is a side view thereof;

FIG. 6 is a perspective view showing the new design for an air filter;

FIG. 7 is an enlarged view of a portion of the air filter of FIG. 6;

FIG. 8 is a top thereof; and,

FIG. 9 is an enlarged view of a portion of the air filter of FIG. 8.

The claimed area of the air filter is illustrated with the color designation for the color yellow. The thicker dash-dash broken lines define the boundaries of the claimed design and form no part thereof.

The portions in the drawing views shown in broken lines form no part of the claimed design.