USD257283SExpiredUtility

Roof stack vent

82
Assignee: GAF CORPPriority: Feb 8, 1979Filed: Feb 8, 1979Granted: Oct 7, 1980
Est. expiryFeb 8, 1999(expired)· nominal 20-yr term from priority
Inventors:Luther L. Roberts
82
PatentIndex Score
20
Cited by
4
References
1
Claims

Claims

exact text as granted — not AI-modified
The ornamental design for a roof stack vent, substantially as shown and described.

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