USD471972SExpiredUtility

Extension for a heating duct

Priority: Nov 7, 2001Filed: Nov 7, 2001Granted: Mar 18, 2003

Est. expiryNov 7, 2021(expired)· nominal 20-yr term from priority

PatentIndex Score

Cited by

References

Claims

exact text as granted — not AI-modified

The ornamental design for an extension for a heating duct, as shown and described.

Join the waitlist — get patent alerts

Track USD471972S — get alerts on status changes and closely related new filings.

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