USD300772SExpiredUtility
Friction furnace
Individually held — no corporate assignee on recordPriority: Sep 4, 1986Filed: Sep 4, 1986Granted: Apr 18, 1989
Est. expirySep 4, 2006(expired)· nominal 20-yr term from priority
Inventors:Louis D. Powell
22
PatentIndex Score
0
Cited by
3
References
1
Claims
Claims
exact text as granted — not AI-modifiedThe ornamental design for a friction furnace, as shown and described.
Join the waitlist — get patent alerts
Track USD300772S — get alerts on status changes and closely related new filings.
We store only your email — no account needed. See our privacy policy.