USPTO serial 71611401
Reviewed by CopyMark Law Group
This page summarizes the public USPTO record for this serial number, including owners, goods and services, and prosecution history.
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SAN FRANCISCO, CA
| Class | Description | Status | First use |
|---|---|---|---|
| 034 | HEAT EXCHANGING EQUIPMENT INCLUDING ONE OR MORE HEAT EXCHANGE SCREW CONVEYORS COMPRISED OF A HOLLOW SCREW THROUGH WHICH THE HEAT TRANSFER AGENT PASSES | EXPIRED | Jan 9, 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 |
|---|---|---|---|
| Nov 1, 1993 | EXRG | EXPIRED SEC. 9 | — |
| Jan 27, 1973 | REN1 | REGISTERED AND RENEWED (FIRST RENEWAL - 20 YRS) | — |