USD254904SExpiredUtility

Exhaust stack

76
Individually held — no corporate assignee on recordPriority: Jan 30, 1978Filed: Jan 30, 1978Granted: May 6, 1980
Est. expiryJan 30, 1998(expired)· nominal 20-yr term from priority
Inventors:Edward J. Swearingen, Jr.
76
PatentIndex Score
15
Cited by
2
References
1
Claims

Claims

exact text as granted — not AI-modified
The ornamental design for an exhaust stack, as shown.

Join the waitlist — get patent alerts

Track USD254904S — get alerts on status changes and closely related new filings.

We store only your email — no account needed. See our privacy policy.