USD591778SExpiredUtility

Refractory block

87
Assignee: HARBISON WALKER REFRACTORIESPriority: Apr 29, 2005Filed: Aug 30, 2007Granted: May 5, 2009
Est. expiryApr 29, 2025(expired)· nominal 20-yr term from priority
Inventors:John J. StephanskyJohn E. Berry
F27D 1/0006F27D 1/04F27D 1/141E04B 2002/0208E04B 2/06
87
PatentIndex Score
8
Cited by
25
References
1
Claims

Claims

exact text as granted — not AI-modified
CLAIM 
     
       The ornamental design for the refractory block, as shown as described.

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