USPTO serial 72000156
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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 |
|---|---|---|---|
| 001 | LOST CIRCULATION COMPOSED OF WASTE PAPER, WOOD PULP, AND CLAY MATERIAL FOR USE IN ROTARY DRILLING FLUID MUD, COMMONLY CALLED "MUD SEAL" | EXPIRED | Nov 5, 1955 |
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 |
|---|---|---|---|
| Oct 6, 1997 | EXRG | EXPIRED SEC. 9 | — |
| Jan 1, 1977 | REN1 | REGISTERED AND RENEWED (FIRST RENEWAL - 20 YRS) | — |