Ekuba v. Mattenhauer: Window Pivot & Track Patent Appeal Dismissed
Ekuba Participações Ltda brought an infringement action against R B Mattenhauer Acessorios e Assessoria Empresarial ME asserting two Brazilian utility model patents covering rotating pivot window bearings and adjustable track systems for windows, doors, and terraces. The Court of Justice of São Paulo dismissed the appeal in January 2025, leaving the lower court’s rejection of the embargo declaration intact.
São Paulo appeal court closes window hardware patent dispute
Ekuba Participações Ltda, holder of Brazilian utility model registrations BRMU8203334U and BRMU8500588U, brought an infringement action against R B Mattenhauer Acessorios e Assessoria Empresarial ME before the Court of Justice of São Paulo. The two patents protect, respectively, an arrangement for rotating, pivoting, and sliding window assemblies using bearings or similar components, and a constructive device for adjustable-opening track systems applicable to windows, doors, terraces, and similar structures — both squarely within the window and architectural hardware sector.
The case was resolved when the Court of Justice of São Paulo dismissed the appeal, with the verbatim outcome recording that the declaration of embargo was rejected. A procedural dismissal at appellate level means the court declined to reach the merits of the patent infringement claims at this stage, leaving the lower court’s determination standing. For Ekuba, this suggests the enforcement attempt did not advance further through the appellate track on this procedural pathway.
Without a filing date in the public record, the full duration of the dispute cannot be assessed. The dismissal of the appeal — rather than a substantive ruling on infringement — is consistent with procedural obstacles that frequently arise in Brazilian IP litigation, including issues of standing, procedural admissibility, or the form of the embargo declaration itself. The public record does not reveal whether parallel proceedings or alternative enforcement routes remain available to the patent holder.
Filing to Appeal Dismissed in 0 days
Case closed 15 January 2025; filing date not available in public record
Appeal dismissed: what the São Paulo ruling means for both parties
Procedural dismissal: no merits adjudication reached
A dismissed appeal at this appellate level means the court declined to hear or rule on the substance of the infringement claims in this procedural pathway. The rejection of the embargo declaration recorded in the verdict suggests the specific legal instrument sought — an injunctive or seizure order — was found procedurally deficient or inadmissible. The underlying patent validity and infringement questions were not resolved on the merits by this ruling.
No merits rulingEkuba’s enforcement bid stalls without a merits win
For Ekuba Participações, the dismissal means the appeal did not produce an enforceable ruling on infringement or an embargo against Mattenhauer at this stage. The patents BRMU8203334U and BRMU8500588U remain formally in force, but this proceeding did not deliver the commercial enforcement outcome typically sought. Whether alternative proceedings or a reformulated claim remain possible is not apparent from the public record.
Patents intact, enforcement stalledMattenhauer avoids an infringement finding at appellate level
R B Mattenhauer exits this appellate proceeding without an adverse infringement finding or embargo order. A procedural dismissal, however, is not a ruling that the defendant does not infringe — it is silent on that question. Mattenhauer’s commercial exposure to Ekuba’s two utility model patents is therefore not definitively resolved, and a new or differently framed proceeding by the patent holder cannot be excluded from the public record alone.
No infringement finding — not clearedWindow hardware sector: unresolved IP risk persists
The dismissal without merits adjudication leaves the scope and enforceability of BRMU8203334U and BRMU8500588U untested in a final ruling. For suppliers, distributors, and manufacturers of rotating pivot window assemblies and adjustable track hardware in Brazil, this outcome is consistent with continued uncertainty. Competitors operating in this product space should treat the patents as live enforcement risks absent a definitive invalidity or non-infringement determination.
Live IP risk in window hardwareFull party and counsel information
| Role | Name | Type | Detail |
|---|---|---|---|
| Plaintiff | Ekuba Participações Ltda | Individual | Window hardware IP holder — asserting BRMU8203334U and BRMU8500588USearch in Eureka ↗ |
| Defendant | R B Mattenhauer Acessorios e Assessoria Empresarial ME | Individual | Window and door accessories supplier and business consultancy, São PauloSearch in Eureka ↗ |
| Presiding judge | Judge N/A | Judge | Court of Justice of Sao PauloSearch in Eureka ↗ |
Official order — verbatim text
The verdict records that the declaration of embargo was rejected and the appeal dismissed. This phrasing indicates the court disposed of the matter on procedural rather than substantive grounds — no finding on patent infringement or validity was made. For Ekuba, the embargo rejection suggests the specific legal instrument chosen did not satisfy the court’s admissibility threshold. For Mattenhauer, the absence of a merits ruling means the defendant holds no positive non-infringement or invalidity determination that could be relied upon defensively in future proceedings.
BRMU8203334U & BRMU8500588U — Window pivot and adjustable track hardware
BRMU8203334U is a Brazilian utility model registration protecting an arrangement for rotating, pivoting, and sliding window assemblies incorporating bearings or similar components — a mechanical system focused on the movement and support hardware of window units. BRMU8500588U covers a constructive device for adjustable-opening track systems applicable to windows, doors, terraces, and comparable architectural openings. Both registrations fall within the utility model (modelo de utilidade) category under Brazilian IP law, which protects functional improvements to existing objects rather than inventions of a higher order of novelty.
Together, these two registrations cover core mechanical components that appear across a wide range of residential and commercial fenestration products in Brazil. Any supplier or manufacturer of pivot hardware, sliding window fittings, or track-and-channel systems for doors and windows in the Brazilian market must assess their product designs against both registrations. The fact that Ekuba pursued enforcement through the Court of Justice of São Paulo signals active commercial intent to protect this IP, making ongoing monitoring of related filings and proceedings strategically important for competitors.
Should you run an FTO against BRMU8203334U and BRMU8500588U?
Any company manufacturing, importing, or distributing rotating pivot window hardware, bearing-based window assemblies, or adjustable track systems for windows, doors, or terraces in Brazil should treat these two utility model registrations as live FTO risks. This case confirms that Ekuba Participações is prepared to pursue enforcement in São Paulo courts. A procedural dismissal does not equate to a cleared FTO — the patents remain in force and the question of infringement was never decided on the merits.
PatSnap Eureka’s FTO Search Agent enables R&D and product teams to map specific product designs against the claims of BRMU8203334U and BRMU8500588U, assess the scope of the utility model registrations in the context of the Brazilian patent landscape, and identify design-around opportunities before product launch. Eureka also allows continuous monitoring of Ekuba’s filing and litigation activity so that new enforcement risk surfaces before it becomes a commercial problem.
Run a freedom-to-operate analysis on BRMU8203334U to assess your product’s exposure
Run FTO in Eureka →Similar window hardware utility model cases in Brazilian courts
Cases involving Brazilian utility model enforcement for window and door hardware components in the Court of Justice of São Paulo and related state courts.
What this case signals for the Brazilian window hardware IP landscape
Procedural dismissals in Brazilian utility model enforcement reveal structural risks for patent holders pursuing embargo-based relief.
Embargo declarations in Brazilian IP suits carry high procedural risk
The rejection of Ekuba’s embargo declaration — rather than a merits ruling — is consistent with Brazilian courts’ strict requirements around injunctive and seizure instruments in IP cases. Patent holders asserting utility model rights should ensure the procedural form of embargo requests meets all admissibility requirements before relying on them as a primary enforcement lever.
Utility model patents in window hardware remain enforceable but untested
BRMU8203334U and BRMU8500588U have not been found invalid or not infringed. Competitors and suppliers of pivot bearing and adjustable track systems in Brazil should conduct freedom-to-operate analysis against both registrations, as the commercial risk from a future reformulated enforcement action by Ekuba has not been extinguished by this dismissal.
Ltda v R — key questions answered
The Court of Justice of São Paulo dismissed the appeal in January 2025. The declaration of embargo sought by Ekuba was rejected, and no merits ruling on patent infringement was issued. The case was closed on 15 January 2025 under case number 1052042-05.2020.8.26.0100/50000.
Ekuba asserted two Brazilian utility model registrations: BRMU8203334U, covering an arrangement for rotating, pivoting, and sliding window assemblies with bearings or similar components, and BRMU8500588U, covering a constructive device for adjustable-opening tracks for windows, doors, terraces, and similar structures.
No. The dismissal was procedural — the court rejected the embargo declaration without reaching the merits of the infringement claim. This means there is no court finding either confirming or denying infringement by Mattenhauer. The patents remain in force and the infringement question is unresolved.
Under Brazilian IP law (Law 9,279/1996), a utility model (modelo de utilidade) protects functional improvements to objects of practical use that result in better use or manufacture. It requires a lower inventive step threshold than an invention patent and has a term of 15 years from filing. Both BRMU8203334U and BRMU8500588U are utility model registrations, not invention patents.
Companies manufacturing or selling rotating pivot window assemblies, bearing-based window fittings, or adjustable track systems for windows and doors in Brazil should conduct FTO analysis against BRMU8203334U and BRMU8500588U. The procedural dismissal does not extinguish Ekuba’s enforcement rights, and a future action on the same registrations through a different procedural instrument remains possible.
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