USPTO serial 71549137
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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 |
|---|---|---|---|
| 103 | CHEMICAL AND ENGINEERING SERVICES RENDERED IN CONNECTION WITH THE TREATMENT OF WELLS-NAMELY, ACIDIZING, CEMENTING, PLASTIC PLUGGING, PARAFFIN REMOVAL AND SURVEYING WITH SCIENTIFIC APPARATUS TO DETERMINE SIZE OF WELL BOR, PERMEANBILITY OF PRODUCTING SECTION, AND PIONT OF WATER ENTRY; AND FOR INDCUSTRIAL ACIDIZING SERVICES-NAMELY, CHEMICAL REMOVEAL OF SCALE FORM HEAT EXCHANGE EQUIPMENT | EXPIRED | Feb 21, 1935 |
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 | — |
| May 8, 1971 | REN1 | REGISTERED AND RENEWED (FIRST RENEWAL - 20 YRS) | — |