USPTO serial 72126335
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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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| Class | Description | Status | First use |
|---|---|---|---|
| 026 | MECHANICAL INSTRUMENT FOR RECORDING DATA CONCERNING WELL DRILLING OPERATIONS, SUCH AS DRILLING TIME IN MINUTES PER FOOT, ROUND TRIP TIME FOR CHANGING BITS AND ADDING JOINTS, SHUTDOWN TIME AND THE LIKE | EXPIRED | Mar 12, 1940 |
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 |
|---|---|---|---|
| Jul 29, 1987 | EXRG | EXPIRED SEC. 9 | — |