USD250590SExpiredUtility

Envelope blank

74
Assignee: CHAMPION INT CORPPriority: Apr 25, 1977Filed: Apr 25, 1977Granted: Dec 19, 1978
Est. expiryApr 25, 1997(expired)· nominal 20-yr term from priority
Inventors:Robert CohnCharles M. Young, Iii
74
PatentIndex Score
12
Cited by
3
References
1
Claims

Claims

exact text as granted — not AI-modified
The ornamental design for an envelope blank, as shown and described.

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