USD245333SExpiredUtility

Pipe vent

30
Individually held — no corporate assignee on recordPriority: May 26, 1976Filed: May 26, 1976Granted: Aug 9, 1977
Est. expiryMay 26, 1996(expired)· nominal 20-yr term from priority
Inventors:William V. PorterMaurice A. Riordan
30
PatentIndex Score
2
Cited by
5
References
1
Claims

Claims

exact text as granted — not AI-modified
The ornamental design for a pipe vent, as shown.

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