USPTO serial 71538587
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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 |
|---|---|---|---|
| 023 | DUST HANDLING APPARATUS INCLUDING DUST COLLECTING HOPPERS, VALVES TO REMOVE DUST FROM SUCH HOPPERS, PIPING THROUGH WHICH SUCH DUST MAY BE CONVEYED AND MEANS FOR CREATING VACUUM OR SUBATMOSPHERIC PRESSURE IN SAID PIPING AND VALVES, SUCH APPARATUS BEING USED PARTICULARLY IN CONNECTION WITH COAL BURNING FURNACES | EXPIRED | May 6, 1947 |
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 | — |
| Sep 19, 1970 | REN1 | REGISTERED AND RENEWED (FIRST RENEWAL - 20 YRS) | — |