USD744088SActiveUtility

Respirator mask having a circular button

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Assignee: 3M INNOVATIVE PROPERTIES COPriority: May 22, 2014Filed: May 22, 2014Granted: Nov 24, 2015
Est. expiryMay 22, 2034(~7.8 yrs left)· nominal 20-yr term from priority
Inventors:David M. BlombergKent E. LagesonWilliam A. MittelstadtCarl W. Raines, IiiCharlie Wood
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PatentIndex Score
1
Cited by
108
References
1
Claims

Claims

exact text as granted — not AI-modified
CLAIM 
     
       The ornamental design for a respirator mask having a circular button, as shown and described.

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