WISA Industrial v. Freitas: Thermostatic Valve Housing Appeal Dismissed
WISA Industrial Ltda pursued an infringement claim against Fabio Antonio de Freitas before the Court of Justice of São Paulo, asserting Brazilian patent BR102020012366B1 covering an enhancement to a thermostatic valve housing. The appellate proceeding concluded with the appeal dismissed, leaving the lower court’s disposition intact.
São Paulo appellate court ends WISA valve housing dispute without merits ruling
WISA Industrial Ltda, a Brazilian industrial manufacturer holding patent BR102020012366B1, brought an infringement action against individual defendant Fabio Antonio de Freitas in the Court of Justice of São Paulo (Case No. 1093908-85.2023.8.26.0100). The patent in dispute covers an enhancement introduced into a housing designed for a thermostatic valve — a component used in fluid temperature-control systems with applications across automotive, HVAC, and industrial process sectors.
The case reached the appellate level of the Court of Justice of São Paulo, where the court issued a terse but consequential ruling: ‘the appeal is DISMISSED.’ The Basis of Termination is recorded as ‘Appeal Dismissed,’ indicating the appellate chamber declined to adjudicate the merits, ending the appellate phase on procedural or standing grounds. The lower court’s position therefore remains operative, though the specific lower court outcome is not detailed in the available public record.
Without a filing date in the public record, the full duration of these proceedings cannot be assessed. The dismissal of an appeal without merits engagement is consistent with procedural defects — such as timeliness, standing, or formal requirements under Brazilian civil procedure — rather than a substantive finding on patent validity or infringement. What drove the dismissal specifically, and whether WISA Industrial pursues further remedies, remains unknown from the public record.
Filing to Appeal Dismissed in 0 days
Case closed 3 March 2025 — exact filing date not on public record
Appeal dismissed: what the São Paulo ruling means for both parties
Procedural dismissal — no merits adjudicated at appellate level
A dismissed appeal means the Court of Justice of São Paulo declined to rule on the substance of the infringement dispute. Under Brazilian civil procedure, appeals may be dismissed for failure to satisfy formal requirements — including timeliness, payment of court fees, or standing defects. The dismissal does not constitute a finding on patent validity or whether infringement occurred; it simply closes the appellate docket on procedural grounds.
No merits rulingAppeal closed without a second-instance merits review
The dismissing party — whichever party brought the appeal — receives no appellate determination on the substantive patent infringement issues. If the defendant appealed an adverse lower court judgment, that judgment remains unchallenged at this level. If WISA Industrial was the appellant, it is left without an appellate finding in its favour. The public record does not specify which party filed the appeal, creating analytical uncertainty.
Appellate route closedBR102020012366B1 remains asserted — lower court position intact
The dismissal of the appeal preserves the lower court’s outcome, whatever that may be. WISA Industrial’s patent BR102020012366B1 is not invalidated by this ruling. Depending on the lower court’s findings, WISA may retain the ability to enforce the patent through separate or continued proceedings. Competitors and licensees in the thermostatic valve housing space should monitor future WISA filings.
Patent survives this proceedingThermostatic valve housing IP: enforcement risk persists in Brazil
The fact that WISA Industrial pursued litigation through the appellate level signals a willingness to enforce BR102020012366B1 aggressively. Manufacturers, component suppliers, and OEMs operating in Brazil’s thermostatic valve and fluid-control hardware market should treat this patent as actively enforced. A procedural dismissal does not reduce the underlying IP risk — an FTO assessment against this patent remains advisable for market participants.
Active enforcement signalFull party and counsel information
| Role | Name | Type | Detail |
|---|---|---|---|
| Plaintiff | WISA INDUSTRIAL LTDA | Individual | Brazilian industrial manufacturer — holder of BR102020012366B1, thermostatic valve housing patentSearch in Eureka ↗ |
| Defendant | FABIO ANTONIO DE FREITAS | Individual | Individual defendant alleged to have infringed WISA’s thermostatic valve housing patentSearch in Eureka ↗ |
| Presiding judge | Judge N/A | Judge | Court of Justice of Sao PauloSearch in Eureka ↗ |
Official order — verbatim text
The appellate court’s ruling — ‘the appeal is DISMISSED’ — is a procedural termination rather than a substantive adjudication of infringement or patent validity. Under Brazilian appellate procedure, such a dismissal typically reflects a failure to satisfy admissibility requirements, such as procedural timeliness or formal defects in the appeal brief. The consequence is that no second-instance merits determination was issued; the lower court’s position remains operative, and neither party obtains an appellate ruling on the patent infringement claim itself.
BR102020012366B1 — Enhancement to Thermostatic Valve Housing
BR102020012366B1 is a Brazilian patent covering an enhancement introduced into a housing designed to accommodate a thermostatic valve. Thermostatic valve housings are precision-engineered components that physically integrate the thermostatic element — the part that opens or closes fluid passages in response to temperature — into the broader fluid circuit. The patent designation ‘B1’ under Brazil’s INPI system indicates a granted patent with examination, conferring standard enforcement rights. The application number prefix ‘1020200’ places the filing in 2020.
Thermostatic valve technology is deployed across a wide range of commercial applications, including automotive engine cooling systems, building HVAC circuits, and industrial process temperature control. An enhancement to the valve housing — particularly one granted patent protection — can cover geometry, material integration, sealing improvements, or assembly methods that affect thermal response and durability. For competing manufacturers and component importers in Brazil, this patent represents a meaningful enforcement risk, as even minor design adaptations to a thermostatic housing could fall within claim scope depending on the breadth of the granted claims.
Should your product team run an FTO against BR102020012366B1?
Any company manufacturing, importing, or distributing thermostatic valve housings in Brazil should treat BR102020012366B1 as an active enforcement risk. WISA Industrial’s willingness to pursue litigation through the São Paulo appellate level — against an individual defendant — signals that the company monitors and enforces this patent. Product teams developing or sourcing enhanced valve housing designs should conduct an FTO assessment before commercialisation, particularly given the breadth that ‘enhancement introduced into housing’ language may carry.
PatSnap Eureka’s FTO Search Agent can map your thermostatic valve housing design against the claim scope of BR102020012366B1, identify design-arounds, and flag related INPI filings in WISA Industrial’s portfolio. Eureka also surfaces Brazilian litigation history and BRPTO opposition records, giving your IP and R&D teams a consolidated view of freedom-to-operate risk before a product launch or supplier qualification decision.
Run a freedom-to-operate analysis on BR102020012366B1 to assess your product’s exposure
Run FTO in Eureka →Similar thermostatic valve and fluid-control patent infringement cases in Brazil
Cases involving thermostatic valve and fluid-control component patents litigated before Brazilian state courts of justice and the BRPTO administrative track.
What this case signals for the thermostatic valve housing IP landscape in Brazil
A dismissed appeal without merits ruling still carries strategic weight — WISA’s willingness to litigate signals active patent enforcement intent in Brazil’s industrial hardware sector.
Procedural dismissals don’t extinguish patent risk — monitor WISA’s portfolio
The dismissal of this appeal resolves the appellate docket but leaves the underlying patent in force. WISA Industrial’s assertion of BR102020012366B1 against an individual defendant suggests the company monitors the market actively. Any entity commercialising thermostatic valve housings in Brazil should assess exposure before the next enforcement action.
Brazilian IP litigation reaches state appeal courts — know the procedural terrain
This case illustrates that Brazilian patent infringement actions travel through state courts of justice at the appellate level, not exclusively through federal IP tribunals. Practitioners and in-house teams managing Brazilian portfolios should account for state appellate procedural requirements, which differ materially from federal civil courts and the BRPTO administrative track.
LTDA v FABIO — key questions answered
In Case 1093908-85.2023.8.26.0100, the Court of Justice of São Paulo dismissed the appeal, meaning the appellate chamber declined to rule on the merits of the infringement dispute. This is a procedural termination — typically for timeliness or formal defects — and does not constitute a finding on patent validity or whether infringement of BR102020012366B1 occurred.
BR102020012366B1 is a granted Brazilian patent held by WISA Industrial Ltda covering an enhancement introduced into a housing for a thermostatic valve. The ‘B1’ designation indicates a fully examined and granted patent under Brazil’s INPI system. The application was filed in 2020. The patent is relevant to manufacturers and importers of thermostatic valve assemblies in Brazil.
The case was heard by the Court of Justice of São Paulo (Tribunal de Justiça do Estado de São Paulo), a state-level appellate court in Brazil. The case number is 1093908-85.2023.8.26.0100. The appeal was dismissed and the case was recorded as closed on 3 March 2025.
No. The dismissal of the appeal is a procedural outcome and does not invalidate BR102020012366B1. The patent remains in force unless separately challenged through Brazil’s INPI administrative nullity proceedings or a federal court invalidity action. The dismissal simply closes the appellate chapter of this particular infringement action.
Yes. WISA Industrial’s active litigation against Fabio Antonio de Freitas signals that the company enforces BR102020012366B1. Manufacturers, importers, and distributors of thermostatic valve housings in Brazil should conduct an FTO assessment to determine whether their designs fall within the patent’s claim scope, particularly given the broad language covering ‘enhancement introduced into housing for thermostatic valve.’
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