USD316142SExpiredUtility

Air purification unit

44
Assignee: CONTROL RESOURCE SYSTEMS INCPriority: Feb 15, 1989Filed: Feb 15, 1989Granted: Apr 9, 1991
Est. expiryFeb 15, 2009(expired)· nominal 20-yr term from priority
Inventors:Rickey S. LutterbachJeffrey A. Granacki
44
PatentIndex Score
5
Cited by
2
References
1
Claims

Claims

exact text as granted — not AI-modified
The ornamental design for an air purification unit, as shown and described.

Join the waitlist — get patent alerts

Track USD316142S — get alerts on status changes and closely related new filings.

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