Oliveira v. Eternit S.A.: Photovoltaic Cell Patent Appeal Dismissed
Emerson Cordeiro de Oliveira brought a patent infringement action against Eternit S.A. over Brazilian patent BR102019001956B1, covering a photovoltaic cell and encapsulated photovoltaic cell manufacturing process. The Court of Justice of São Paulo dismissed the appeal without reaching the merits, ending the appellate phase of this dispute.
PV Cell Patent Appeal Against Eternit Ends Without Merits Ruling
Emerson Cordeiro de Oliveira filed an infringement action against Eternit S.A. and an additional defendant, asserting Brazilian patent BR102019001956B1, which covers a photovoltaic cell and an encapsulated photovoltaic cell manufacturing process. The case was brought before the Court of Justice of São Paulo, one of Brazil’s most active state appellate courts for commercial and IP disputes. The underlying subject matter — solar cell encapsulation technology — sits at the intersection of manufacturing process patents and the fast-growing Brazilian solar energy market.
The appeal was dismissed without being heard on its merits, as reflected in the court’s ruling: ‘the appeal is not heard.’ Under Brazilian procedural law, this outcome typically signals a failure to satisfy formal admissibility requirements — such as procedural prerequisites, standing, timeliness, or the proper form of the appellate submission — rather than any adjudication of the underlying infringement claims. Neither party received a substantive determination on the patent’s validity or Eternit’s alleged infringement.
Because the dismissal was purely procedural, the substantive questions raised by this case — whether BR102019001956B1 was infringed and whether the patent withstands scrutiny — remain unresolved in the public record. The relatively swift closure in 2025 suggests the admissibility defect was identified early in the appellate process. It remains unknown whether the plaintiff intends to refile, cure the procedural deficiency, or pursue alternative enforcement routes against Eternit.
Filing to Appeal Dismissed in 0 days
Case closed 10 September 2025 — São Paulo state appellate court
Appeal dismissed: what a non-merits ruling means for both parties
Appeal ‘not heard’ — a procedural, not substantive, end
When a Brazilian appellate court rules that an appeal ‘is not heard,’ it is exercising a gatekeeping function rather than evaluating the claim. This outcome — known as não conhecimento do recurso — means the appeal failed to meet formal admissibility criteria. Common grounds include procedural irregularity, lack of standing, missed deadlines, or deficient preparation of the appellate brief. No finding on patent infringement or validity was made.
Procedural dismissalInfringement claims remain unresolved for the patent holder
For Oliveira, the dismissal leaves the core infringement dispute unadjudicated. Depending on the procedural defect identified, the plaintiff may have scope to refile or pursue the matter at a different procedural stage. However, the public record does not specify whether the dismissal forecloses further action or whether the underlying first-instance proceedings remain live. Patent holders in this position should assess whether the deficiency is curable.
Claims unresolvedEternit avoids merits ruling — but infringement risk persists
Eternit S.A. and its co-defendant secured dismissal without any finding of infringement, providing immediate procedural relief. Critically, however, a non-merits dismissal does not constitute a ruling that Eternit does not infringe BR102019001956B1. The patent remains in force, and Eternit’s exposure to a future action — whether by cure of the procedural defect or a new filing — is not eliminated by this outcome.
No infringement findingPV manufacturing patent remains live enforcement risk in Brazil
BR102019001956B1 covers photovoltaic cell encapsulation manufacturing — a process relevant to any entity producing or importing solar modules in Brazil. The dismissal does not extinguish the patent or narrow its claims. Companies operating in Brazil’s rapidly expanding solar sector, particularly those manufacturing or sourcing encapsulated PV cells, should monitor this patent and any subsequent enforcement activity against Eternit or other market participants.
Patent enforcement risk liveFull party and counsel information
| Role | Name | Type | Detail |
|---|---|---|---|
| Plaintiff | EMERSON CORDEIRO DE OLIVEIRA | Individual | Individual inventor and patent holder — holder of BR102019001956B1 (photovoltaic cell manufacturing process)Search in Eureka ↗ |
| Defendant | ETERNIT S.A. AND ANOTHER | Individual | Eternit S.A. and another — Brazilian building materials and construction products companySearch in Eureka ↗ |
| Presiding judge | Judge N/A | Judge | Court of Justice of Sao PauloSearch in Eureka ↗ |
Official order — verbatim text
The court’s ruling — ‘the appeal is not heard’ — is a formal expression of non-admissibility under Brazilian civil procedure, not a ruling on the merits of the infringement claim. This phrasing (não conhecimento do recurso) confirms the appellate panel found a threshold procedural defect precluding substantive review. The standard applied is one of admissibility, not the merits of patent infringement or validity. Consequently, neither the scope of BR102019001956B1 nor Eternit’s alleged infringing conduct was evaluated, leaving the underlying dispute legally open.
BR102019001956B1 — Photovoltaic Cell and Encapsulated PV Cell Manufacturing Process
BR102019001956B1 is a Brazilian patent covering a photovoltaic cell and the manufacturing process for producing encapsulated photovoltaic cells. The application number prefix BR10 indicates a utility invention filed under Brazilian patent law. The filing year embedded in the application number (2019) places its priority in a period of significant expansion in Brazilian solar energy adoption. Encapsulation is a critical step in solar cell manufacturing, protecting the photovoltaic material from environmental degradation and directly affecting module efficiency and longevity.
From a competitive standpoint, a process patent on PV cell encapsulation is strategically significant in the Brazilian market, where solar installations have grown rapidly and domestic manufacturing ambitions have intensified. If the patent’s claims are drafted broadly enough to capture standard encapsulation techniques, it could create licensing obligations or design-around imperatives for a wide range of manufacturers and importers. Eternit S.A. — primarily known for construction materials — may be expanding into solar roofing or building-integrated photovoltaics, making this dispute commercially relevant beyond a single product line.
Should you run an FTO against BR102019001956B1?
Any company manufacturing, importing, or integrating encapsulated photovoltaic cells in Brazil should assess freedom to operate against BR102019001956B1. The patent remains in force, no validity challenge has succeeded, and no court has narrowed its claims through merits adjudication. This applies particularly to solar module assemblers, building-integrated PV product developers, and construction companies — like Eternit — entering the solar market. The procedural dismissal in this case provides no substantive clearance.
PatSnap Eureka’s FTO Search Agent enables R&D and IP teams to map BR102019001956B1’s claims against specific manufacturing process steps, identify design-around opportunities, and benchmark the patent’s scope against the prior art landscape in Brazil and internationally. Eureka can also flag related Brazilian applications and international family members that may extend the patent holder’s enforcement reach across jurisdictions relevant to your supply chain.
Run a freedom-to-operate analysis on BR102019001956B1 to assess your product’s exposure
Run FTO in Eureka →Similar Photovoltaic Patent Infringement Cases in Brazilian Courts
Explore related patent infringement actions involving photovoltaic and solar manufacturing technology litigated before Brazilian state and federal courts.
What this case signals for the Brazilian solar IP enforcement landscape
A procedurally dismissed appeal leaves a photovoltaic manufacturing patent in force — and the underlying infringement dispute unresolved.
Procedural dismissals do not neutralise patent risk in Brazil
Companies that secure a não conhecimento ruling should not treat the outcome as a clean bill of health. BR102019001956B1 remains valid and enforceable. Eternit and similarly situated manufacturers in the Brazilian PV supply chain face continued exposure unless the patent is challenged on substantive grounds or expires.
Brazilian appellate admissibility rules create enforcement friction
This case illustrates how Brazil’s strict appellate procedural requirements can short-circuit patent enforcement before merits are ever addressed. For IP holders asserting patents at the Court of Justice of São Paulo, procedural precision in appellate filings is as critical as the underlying claim strength. Deficiencies at this stage can delay enforcement by months or years.
OLIVEIRA v ETERNIT — key questions answered
It means the Court of Justice of São Paulo declined to review the appeal on procedural grounds without reaching the merits of the infringement claim. Under Brazilian civil procedure, this ruling — não conhecimento do recurso — is typically issued when the appeal fails admissibility requirements such as timeliness, standing, or formal preparation standards. No finding on patent infringement or validity was made.
Yes. A procedural dismissal of an appeal does not affect the validity or enforceability of the underlying patent. BR102019001956B1 remains in force. The dismissal means no court has ruled on whether Eternit infringes the patent or whether the patent is valid — leaving the patent fully available for future enforcement actions.
BR102019001956B1 covers a photovoltaic cell and a manufacturing process for producing encapsulated photovoltaic cells. The patent is relevant to solar module production, particularly the encapsulation step that protects photovoltaic materials from environmental exposure. The application was filed in 2019, during a period of rapid growth in Brazil’s solar energy sector.
The ability to refile depends on the specific procedural defect identified by the court and whether it is curable under Brazilian procedure. A non-merits dismissal does not constitute res judicata on the infringement question, which suggests the plaintiff may retain options depending on the nature of the admissibility failure. The public record does not specify the exact defect or whether refiling is possible.
Eternit S.A. is a Brazilian company historically associated with building and construction materials. Its involvement in a photovoltaic cell patent dispute is consistent with a broader industry trend of construction companies entering the solar roofing and building-integrated photovoltaics market. The case suggests Eternit may be manufacturing or commercialising products that the plaintiff alleges fall within the scope of BR102019001956B1.
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