USD673901SActiveUtility

Economizer for petroleum

29
Assignee: SUN DAVIDPriority: Mar 30, 2012Filed: Mar 30, 2012Granted: Jan 8, 2013
Est. expiryMar 30, 2032(~5.7 yrs left)· nominal 20-yr term from priority
Inventors:David Sun
29
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exact text as granted — not AI-modified
The ornamental design for an economizer for petroleum, as shown as described.

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