Metroval v. FX Control & Flux: Appeal Granted on Orifice Plate Patent
Metroval Controle de Fluidos Ltda successfully appealed a lower decision in an infringement action against FX Control Instrumentação e Medição de Vazão Eireli and Flux Sistema de Medição Ltda over Brazilian patent BR102016016523B1, covering a door orifice plate flow measurement device. The Court of Justice of São Paulo granted the appeal, reversing the outcome in Metroval’s favour.
Metroval wins appeal over orifice plate flow device patent
Metroval Controle de Fluidos Ltda, a Brazilian fluid control and instrumentation company, brought an infringement action against two competitors — FX Control Instrumentação e Medição de Vazão Eireli and Flux Sistema de Medição Ltda — asserting Brazilian patent BR102016016523B1. The patent protects a device door orifice plate, a component central to precision fluid flow measurement systems used across industrial and utility metering applications.
The case was decided at the appellate level by the Court of Justice of São Paulo (Tribunal de Justiça do Estado de São Paulo — TJSP), which granted Metroval’s appeal on 13 May 2025. The verdict phrasing — ‘I grant to the appeal’ — indicates the appellate panel found in favour of Metroval, overturning or materially modifying the lower court’s position on the infringement claim. This outcome signals a substantive win for the patent holder at the São Paulo state appellate level.
The public record does not disclose the original filing date, making the full duration of proceedings unclear. It is also not publicly confirmed whether damages, injunctive relief, or cost orders were entered alongside the appellate decision. What remains notable is that two separate entities — FX Control and Flux — were named as defendants, suggesting Metroval pursued coordinated enforcement across what it characterised as related infringing activity in the Brazilian flow measurement market.
Filing to Appeal Granted in 0 days
Case closed 13 May 2025; filing date not published in available record
São Paulo Court of Justice grants appeal: what the ruling means for both parties
Granting an appeal reverses the lower court’s outcome
When an appellate court ‘grants the appeal,’ it finds the lower court erred — legally or factually — and rules in favour of the appellant. Here, Metroval’s appeal being granted means the TJSP concluded the first-instance decision did not correctly apply the law or assess the infringement evidence. The appellate ruling becomes the operative decision, and its findings are binding on the parties unless further challenged at a higher tribunal.
Appeal granted — lower decision overturnedMetroval’s patent is vindicated at appellate level
A granted appeal restores or reinforces Metroval’s ability to enforce BR102016016523B1 against FX Control and Flux. The ruling strengthens the patent’s perceived validity and enforceability in the Brazilian market. Metroval is now positioned to seek injunctive relief, damages, or both, depending on the scope of the TJSP’s order. Competitors operating in the orifice plate flow measurement sector should treat this as a credible enforcement signal.
Patent enforceability reinforcedDefendants face renewed infringement exposure after appeal loss
FX Control and Flux lost at the appellate stage, meaning the lower court ruling they had relied upon no longer protects them. Depending on the TJSP’s specific orders, they may face injunctions requiring product withdrawal, financial liability for past infringement, or both. Their options now include further appeal to Brazil’s Superior Court of Justice (STJ) on points of law, though such review is narrow and not guaranteed. Continued sale of the accused product carries significant legal risk.
Defendants exposed to enforcement actionOrifice plate IP enforcement signals tighter competitive boundaries in Brazil
This ruling suggests that Brazilian courts are willing to uphold patent rights in specialised flow measurement hardware at the appellate level. Companies developing or commercialising orifice plate devices in Brazil should reassess freedom-to-operate against Metroval’s portfolio. The involvement of two distinct defendant entities also signals that Metroval may pursue network-level enforcement — targeting related companies across the supply or distribution chain rather than a single infringer.
Brazilian flow metering IP — elevated riskFull party and counsel information
| Role | Name | Type | Detail |
|---|---|---|---|
| Plaintiff | METROVAL CONTROLE DE FLUIDOS LTDA | Individual | Brazilian fluid control instrumentation company — holder of BR102016016523B1Search in Eureka ↗ |
| Defendant | FX CONTROL INSTRUMENTAÇÃO AND MEDIÇÃO DE VAZÃO EIRELI and FLUX SISTEMA DE MEDIÇÃO LTDA | Individual | FX Control Instrumentação e Medição de Vazão Eireli and Flux Sistema de Medição Ltda — Brazilian flow measurement equipment suppliersSearch in Eureka ↗ |
| Presiding judge | Judge N/A | Judge | Court of Justice of Sao PauloSearch in Eureka ↗ |
Official order — verbatim text
The TJSP’s verdict — ‘by my vote I grant to the appeal’ — is the language of an appellate panel ruling in favour of the appellant, Metroval. At the Brazilian state appellate level, granting an appeal typically means the reviewing court found a reversible error in the first-instance decision, whether in legal interpretation, evidentiary assessment, or both. The ruling makes Metroval’s position on infringement of BR102016016523B1 the prevailing judicial determination. The public record does not disclose the specific grounds, relief ordered, or whether the matter was remanded or finally resolved.
BR102016016523B1 — Device Door Orifice Plate for Flow Measurement
Brazilian patent BR102016016523B1, held by Metroval Controle de Fluidos Ltda, protects a device door orifice plate — a mechanical assembly used in flow measurement systems to enable insertion or removal of an orifice plate element without interrupting fluid flow in a pipeline. This technology is foundational in industrial metering applications across oil and gas, water utilities, and process industries. The ‘B1’ designation indicates the patent has been granted by the INPI (Instituto Nacional da Propriedade Industrial).
Orifice plate technology occupies a commercially critical niche: it is widely specified in custody transfer and regulatory metering applications where accuracy and compliance are non-negotiable. A granted Brazilian patent covering a door-type orifice plate device gives Metroval a potentially strong exclusionary position over competitors designing similar insertion-style assemblies. Following the TJSP’s appellate ruling, the patent’s enforceability in Brazil is reinforced, raising the competitive stakes for any market participant offering functionally similar flow measurement hardware.
Should you run an FTO against BR102016016523B1?
Any company designing, manufacturing, importing, or distributing orifice plate flow measurement devices — particularly door-type or insertion-style assemblies — for the Brazilian market should treat BR102016016523B1 as a live enforcement risk. The TJSP’s decision to grant Metroval’s appeal confirms this is an actively asserted patent. R&D teams working on flow measurement hardware should assess whether their product architecture falls within the claim scope as interpreted at appellate level.
PatSnap Eureka’s FTO Search Agent can map the claims of BR102016016523B1 against your product specifications, identify prior art that may support a validity challenge, and flag related patents in Metroval’s Brazilian portfolio. For in-house IP and product teams operating in the flow instrumentation sector, running a structured FTO now — before market entry or scale-up — is materially cheaper than defending an infringement action before the TJSP.
Run a freedom-to-operate analysis on BR102016016523B1 to assess your product’s exposure
Run FTO in Eureka →Similar orifice plate and flow measurement patent disputes in Brazil
Explore related patent infringement cases involving flow measurement and industrial instrumentation technology before Brazilian courts, including the TJSP.
What this case signals for the Brazilian flow measurement IP landscape
A successful appeal by Metroval over orifice plate technology suggests growing patent enforcement resolve in Brazil’s industrial instrumentation sector.
Brazilian appellate courts will engage with hardware patent infringement
The TJSP’s willingness to grant Metroval’s appeal on a physical flow measurement device underscores that Brazilian state appellate courts do not treat hardware patent disputes as purely technical dead-ends. Patent holders in the instrumentation space should consider appellate strategy from the outset when first-instance outcomes disappoint.
Multi-defendant enforcement can be an effective strategy in Brazil
Metroval named two separate corporate defendants in a single action, suggesting coordinated manufacturing or distribution of the accused product. This approach, if upheld, creates broader market-clearing effect from a single litigation. IP teams in competitive equipment markets should consider whether related entities sharing infringing products can be joined in Brazilian proceedings.
LTDA v FX — key questions answered
The TJSP granted Metroval’s appeal in case 2295468-36.2024.8.26.0000, overturning the lower court’s decision on the infringement of Brazilian patent BR102016016523B1 covering a device door orifice plate. The ruling was issued on 13 May 2025 and represents a substantive win for Metroval at the state appellate level.
BR102016016523B1 is a granted Brazilian patent held by Metroval Controle de Fluidos Ltda protecting a device door orifice plate — a flow measurement component used in industrial pipelines to allow orifice plate insertion or removal without stopping fluid flow. It is relevant to oil and gas, utilities, and process industry metering applications.
In Brazilian civil procedure, when an appellate court grants an appeal (dá provimento ao recurso), it finds the lower court erred and rules in favour of the appellant. The appellate decision supersedes the first-instance ruling and is binding on the parties. The defendant may seek further review before the Superior Court of Justice (STJ) only on narrow federal law grounds.
Yes, defendants may seek a Special Appeal (Recurso Especial) before Brazil’s Superior Court of Justice (STJ) if they can demonstrate the TJSP’s decision violated federal law. However, STJ review does not re-examine facts, only legal interpretation. If the appellate decision rested on factual infringement findings, the defendants face a narrow and uncertain appellate corridor.
Following the TJSP’s decision to grant Metroval’s appeal, BR102016016523B1 should be treated as an actively enforced patent in Brazil. Companies designing or selling door-type or insertion orifice plate devices in the Brazilian market should conduct a structured FTO analysis against this patent’s claims to assess infringement risk before commercialisation or scale-up.
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