Status report
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The official USPTO status record for MRX, serial 87855154, as a dated PDF. One price, one document, delivered in about a minute.
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Trademark Status Report
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The USPTO's own status record for this mark, on one dated page.
- Current status with a plain-English verdict
- Owner, classes, filing basis, and every key date
- The mark as it appears on the federal record
- Every prosecution event, filing to today
- Source-cited with the exact retrieval date
Built from the USPTO's TSDR record. Assignment chain of title and TTAB proceeding files sit in separate USPTO systems and are not included.
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◆ TRADEMARKCHECKER.AITRADEMARK STATUS REPORT
MRXSerial 87855154 · Principal Register
Dead · Cancelled
Owner: 4D PHARMA PLC
Class 005 - Pharmaceuticals
Filed Mar 29, 2018
Registered Sep 17, 2019
The record shows that the mark “MRX” is no longer active; it was cancelled on March 27 2026 because the registrant, 4D PHARMA PLC, failed to file a Section 8 declaration. The mark was registered on the Principal Register in September 2019 for pharmaceuticals, specifically live biotherapeutics for treating cancer, brain injuries, central nervous system disorders, bowel disorders, lung disorders and diseases, inflammatory and autoimmune diseases, and related preparations. A similar name would raise the closest concern in the same narrow field of live biotherapeutic products. The record does not give the owner control over every use of “MRX”; it is limited to the listed goods. The prosecution history shows the mark was initially approved for publication, then registered, and later cancelled after a missed maintenance filing. No oppositions, cancellations, or court actions appear in the supplied history. For someone considering a similar name, the cancelled status reduces immediate risk, but the specific pharmaceutical scope remains a potential concern.
Full event history, owner details, and verdict inside.
The way I'd use it, honestly, is as the thing you attach when a bank, a marketplace, or a co-founder asks "are we clear on the name". It answers in one page.