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The ornamental design for a dust respirator, substantially as shown and described. |
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FIG. 1 is a top plan view of a dust respirator embodying the new design;
FIG. 2 is a front view of the new design, the rear view being identical to the front view;
FIG. 3 is a bottom plan view of the new design;
FIG. 4 is a side view of the new design with the straps broken away, each side being identical in appearance;
FIG. 5 is a top plan view of a modified form of the mask illustrated in FIG. 1;
FIG. 6 is a front view thereof, the rear view being identical to the front view;
FIG. 7 is a bottom plan view thereof; and
FIG. 8 is a side view thereof with the straps broken away, each side being identical in appearance.
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| 10576314, | Jul 17 2014 | 3M Innovative Properties Company | Respirator including contrast layer |
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| Patent | Priority | Assignee | Title |
| 2751905, | |||
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| Executed on | Assignor | Assignee | Conveyance | Frame | Reel | Doc |
| Sep 10 1979 | American Cyanamid Company | (assignment on the face of the patent) | / | |||
| Feb 12 1992 | American Cyanamid Company | Bilsom AB | ASSIGNMENT OF ASSIGNORS INTEREST | 006353 | /0129 |
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