USD266567SExpiredUtility

Insulating riser sleeve

Assignee: FOSECO TRADING AGPriority: Jan 21, 1977Filed: Apr 12, 1979Granted: Oct 19, 1982

Est. expiryJan 21, 1997(expired)· nominal 20-yr term from priority

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exact text as granted — not AI-modified

The ornamental design for an insulating riser sleeve, as shown.

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