Exhalation valve filter

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Description

FIG. 1 is a perspective view, showing the new design for an exhalation valve filter; the filter is in the form of a nonwoven fibrous web and covers the exhalation valve on a respiratory mask;

FIG. 2 is a rear view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a bottom view thereof;

FIG. 5 is a top view thereof; and,

FIG. 6 is a right side view thereof, the left side view being a mirror image of the right side view.

The broken line showing forms no part of the claimed design, and the shading is provided to illustrate contour only and is not an indication of texture, gloss, etc.

Claims

The ornamental design for an exhalation valve filter, as shown and described.

Referenced Cited
U.S. Patent Documents
D347298 May 24, 1994 Japuntich et al.
5829433 November 3, 1998 Shigematsu et al.
D413166 August 24, 1999 Snow et al.
6047698 April 11, 2000 Magidson et al.
D431647 October 3, 2000 Henderson et al.
D449377 October 16, 2001 Henderson et al.
D458364 June 4, 2002 Curran et al.
RE37974 February 4, 2003 Bowers
6584976 July 1, 2003 Japuntich et al.
6805124 October 19, 2004 Japuntich et al.
Other references
  • U.S. Appl. No. 29/233,288 to Parkin et al., filed Jun. 30, 2005 entitled Frame That Supports An Exhalation Valve Filter.
Patent History
Patent number: D575390
Type: Grant
Filed: Jun 30, 2005
Date of Patent: Aug 19, 2008
Assignee: 3M Innovative Properties Company (St. Paul, MN)
Inventors: Chris W. Scott (County Durham), Derek A. Parkin (County Durham), Abigail L. Curtis (Hartlepool), Lawrie D. Coote (Berkshire)
Primary Examiner: Ian Simmons
Assistant Examiner: Christopher Lee
Attorney: Karl G. Hanson
Application Number: 29/233,287