Pair of filter cartridges for a powered air-purifying respirator
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Description
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.
Claims
The ornamental design for a pair of filter cartridges for a powered air-purifying respirator.
Referenced Cited
U.S. Patent Documents
Foreign Patent Documents
Other references
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Patent History
Patent number: D477401
Type: Grant
Filed: Aug 3, 2000
Date of Patent: Jul 15, 2003
Assignee: 3M Innovative Properties Company (St. Paul, MN)
Inventors: Ian T. Petherbridge (Bognor Regis), David Cook (Bracknell)
Primary Examiner: Ian Simmons
Attorney, Agent or Law Firm: Karl G Hanson
Application Number: 29/127,312
Type: Grant
Filed: Aug 3, 2000
Date of Patent: Jul 15, 2003
Assignee: 3M Innovative Properties Company (St. Paul, MN)
Inventors: Ian T. Petherbridge (Bognor Regis), David Cook (Bracknell)
Primary Examiner: Ian Simmons
Attorney, Agent or Law Firm: Karl G Hanson
Application Number: 29/127,312
Classifications