USPTO serial 72423720
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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 | SEMI-PERMEABLE HOLLOW FIBER DEVICES FOR LABORATORY USE AS MOLECULAR SIEVES, WITH STRUCTURES CONTAINING PORES OF CONTROLLED DIMENSIONS | EXPIRED | Mar 8, 1972 |
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 11, 1994 | EXRG | EXPIRED SEC. 9 | — |
| Oct 15, 1980 | C15A | REGISTERED - SEC. 8 (6-YR) ACCEPTED & SEC. 15 ACK. | — |