USD550837SExpiredUtility

Frame that supports an exhalation valve filter

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Assignee: 3M INNOVATIVE PROPERTIES COPriority: Jun 30, 2005Filed: Jun 30, 2005Granted: Sep 11, 2007
Est. expiryJun 30, 2025(expired)· nominal 20-yr term from priority
Inventors:Derek A. ParkinChris W. ScottAbigail L. CurtisLawrie D. Coote
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PatentIndex Score
0
Cited by
9
References
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Claims

Claims

exact text as granted — not AI-modified
CLAIM 
     
       The ornamental design for a frame that supports an exhalation valve filter, as shown and described.

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