USRE40577EExpiredUtility

Flexible tube having a variable stiffness bellows

75
Assignee: DU PONTPriority: Jun 30, 2000Filed: Apr 14, 2005Granted: Nov 25, 2008
Est. expiryJun 30, 2020(expired)· nominal 20-yr term from priority
Inventors:Michel C. Renaud
F16L 11/121F16L 11/111
75
PatentIndex Score
7
Cited by
6
References
1
Claims

Claims

exact text as granted — not AI-modified
CLAIM 
     
       The ornamental design for a flexible tube having a variable stiffness bellows, as shown and described.

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