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Publication numberUSD477401 S1
Publication typeGrant
Application numberUS 29/127,312
Publication dateJul 15, 2003
Filing dateAug 3, 2000
Priority dateAug 3, 2000
Publication number127312, 29127312, US D477401 S1, US D477401S1, US-S1-D477401, USD477401 S1, USD477401S1
InventorsIan T. Petherbridge, David Cook
Original Assignee3M Innovative Properties Company
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Pair of filter cartridges for a powered air-purifying respirator
US D477401 S1
Abstract  available in
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  1. The ornamental design for a pair of filter cartridges for a powered air-purifying respirator.

FIG. 1 is a perspective view of a pair of filter cartridges for a powered air-purifying respirator, showing the new design in solid lines.

FIG. 2 is a top view thereof.

FIG. 3 is a left side view thereof.

FIG. 4 is a front view thereof.

FIG. 5 is a right side view thereof.

FIG. 6 is a bottom view thereof.

FIG. 7 is a rear view thereof; and,

FIG. 8 is a front view thereof, only illustrating the solid line portion of the design.

The broken line showing forms no part of the claimed design. The shading is provided only to illustrate contour; it is not indicative of texture, etc.

Non-Patent Citations
1Domestic Preparedness—Powered Air Protection for First Responders C420 Mil-Spec PAPR; SCOTT a Scott Technologies Company (dated Sep. 1999) (a four page brochure).
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US7404401Jun 10, 2005Jul 29, 2008Marlon BradyWater respirator filter
USD652909 *Jan 28, 2009Jan 24, 2012Resmed LimitedRespiratory mask frame
USD669576Dec 19, 2011Oct 23, 2012Resmed LimitedRespiratory mask frame
USD755973 *Jun 25, 2015May 10, 2016The Gym Guy LlcAnaerobic cardio trainer
U.S. ClassificationD24/110.1