Status report
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The official USPTO status record for POSEIDON PPM CLARIFIER, serial 74326937, 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
POSEIDON PPM CLARIFIERSerial 74326937 · Principal Register
Dead · Cancelled
Owner: LES TRAITEMENTS DES EAUX POSEIDON INC.
Class 011 -
Filed Oct 29, 1992
Registered Nov 29, 1994
The record shows that the mark “POSEIDON PPM CLARIFIER” is dead, having been cancelled because the registrant failed to file an acceptable Section 8 declaration. The owner listed is LES TRAITEMENTS DES EAUX POSEIDON INC., a corporation organized in Canada. The mark was registered on the Principal Register for goods described as a clarifier, specifically a water‑treatment unit that eliminates suspended solids by flotation, used in the pulp and paper industry and in the decontamination and processing of water and liquid wastes. A similar name would raise the closest concern in those same water‑treatment and industrial cleaning contexts. The record does not give the mark any control over other uses of the word “Poseidon” or “clarifier.” The last maintenance event was the cancellation on June 13, 2025, and no enforcement actions such as oppositions or cancellations appear in the supplied history. For someone considering a similar name, the risk is that using it for water‑treatment equipment could conflict with this cancelled mark’s prior registration.
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.