USPTO serial 71521772
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This page summarizes the public USPTO record for this serial number, including owners, goods and services, and prosecution history.
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CHICAGO 40, IL
| Class | Description | Status | First use |
|---|---|---|---|
| 015 | PENETRATING LIQUID OIL CONCENTRATE AND LUBRICANT TO BE ADDED TO MOTOR FUEL FOR REDUCING CARBON AND INCREASING THE POWER AND EFFICIENY OF COMBUSTION ENGINES | EXPIRED | May 9, 1945 |
CopyMark links this record to cited §2(d) serials, the owner's other marks, Nice classes, similar mark names, and recently changed USPTO applications.
| Date | Code | Event | What it means |
|---|---|---|---|
| Nov 3, 1992 | EXRG | EXPIRED SEC. 9 | — |
| Nov 30, 1968 | REN1 | REGISTERED AND RENEWED (FIRST RENEWAL - 20 YRS) | — |