USD316897SExpiredUtility

Combined gas treatment tube and enclosing guard tube

Assignee: SUPELCO INCPriority: Apr 14, 1987Filed: Apr 14, 1987Granted: May 14, 1991

Est. expiryApr 14, 2007(expired)· nominal 20-yr term from priority

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Claims

exact text as granted — not AI-modified

The ornamental design for a combined gas treatment tube and enclosing guard tube, as shown and described.

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