USD286213SExpiredUtility

Dual filter respirator

90
Individually held — no corporate assignee on recordPriority: May 11, 1983Filed: May 11, 1983Granted: Oct 14, 1986
Est. expiryMay 11, 2003(expired)· nominal 20-yr term from priority
Inventors:Richard D. MaryyanekJoseph Z. Zdrok
90
PatentIndex Score
39
Cited by
5
References
1
Claims

Claims

exact text as granted — not AI-modified
The original design for a dual filter respirator, as shown and described.

Join the waitlist — get patent alerts

Track USD286213S — get alerts on status changes and closely related new filings.

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