Steelhead LNG v. ARC Resources: LNG Patent Appeal Dismissed (A-361-23)
Steelhead LNG’s appeal of a Federal Court invalidity ruling on CA3027085A1 — covering LNG liquefaction apparatus, methods and systems — was dismissed by the Federal Court of Appeal with costs awarded against the appellants. The court found no palpable and overriding error in the lower court’s conclusion that the impugned claims lacked inventiveness over the prior art.
Canadian LNG Patent Invalidity Upheld on Appeal — No Inventive Step Found
Steelhead LNG (ASLNG) Ltd. filed this appeal in December 2023 before the Federal Court of Appeal of Canada (Case A-361-23), challenging a Federal Court ruling that invalidated claims of Canadian Patent CA3027085A1. The patent covers liquefaction apparatus, methods, and systems — core technology in the LNG production and export value chain. The respondent, ARC Resources Ltd., a major Canadian energy company, had successfully obtained an invalidity determination at the trial level.
The Federal Court of Appeal dismissed the appeal with costs in December 2024. Applying the deferential standard of palpable and overriding error — the applicable appellate standard for findings of fact and mixed fact and law — the court found that Steelhead LNG had not demonstrated any such error in the Federal Court’s conclusion that the impugned claims lacked inventiveness given the state of the prior art. The patent’s invalidity finding therefore stands. The court also directed written submissions on the respondents’ oral request for elevated costs, with a structured schedule through late December 2024.
The approximately 12-month appellate timeline is consistent with Canadian Federal Court of Appeal norms for complex IP matters. The outcome suggests the lower court’s prior art analysis was robustly constructed, leaving little appellate traction on a deferential standard of review. The public record does not disclose whether licensing negotiations, commercial LNG project agreements, or broader patent portfolio disputes between the parties informed the litigation posture — nor is the final quantum of costs known, pending the written submissions process.
Filing to Appeal Dismissed in 355 days
Filed Dec 2023, closed Dec 2024 — approximately 12 months from appeal filing to dismissal
Federal Court of Appeal dismisses: what the ruling means for both parties
Appeal dismissed: palpable and overriding error standard not met
In Canadian appellate patent proceedings, reversing a lower court’s factual or mixed findings requires demonstrating a ‘palpable and overriding error’ — a high bar. The Federal Court of Appeal found that Steelhead LNG failed to meet this threshold. The dismissal is not a fresh merits ruling but a confirmation that the trial court’s invalidity analysis was free from disqualifying error, leaving the Federal Court’s judgment fully intact.
Deferential standard appliedCA3027085A1 remains invalid — Steelhead LNG’s patent protection extinguished
For Steelhead LNG, the dismissal confirms the loss of patent protection over its LNG liquefaction apparatus and methods claims. No further challenge to ARC Resources through these claims is possible at this court level. Steelhead may theoretically seek leave to appeal to the Supreme Court of Canada, but the deferential standard applied and the appellate court’s unequivocal language suggest limited prospects. The patent is effectively eliminated as a commercial or licensing asset.
Patent invalidated — enforceability lostARC Resources secures clean freedom to operate in LNG liquefaction technology
ARC Resources prevailed on both the substantive invalidity challenge and the appeal, and has now obtained an elevated costs award (quantum to be determined by written submissions). With CA3027085A1 invalidated and the appeal dismissed, ARC Resources and any other operators in the Canadian LNG sector can proceed without exposure to infringement claims under this patent. The respondents’ oral request for elevated costs further signals confidence in the strength of their position throughout the proceedings.
FTO confirmed for LNG liquefactionInvalidity ruling strengthens prior art landscape for Canadian LNG sector
The Federal Court’s invalidity finding — now appellate-confirmed — signals that the prior art in LNG liquefaction apparatus and methods was sufficiently developed that novel claim construction faces a high bar in Canada. For competing LNG project developers and equipment suppliers, this outcome suggests that broad liquefaction system claims anchored to existing engineering principles may be vulnerable to invalidity challenges before Canadian courts. R&D and IP teams should reassess claim drafting strategies accordingly.
Prior art limits broad LNG claimsFull party and counsel information
| Role | Name | Type | Detail |
|---|---|---|---|
| Plaintiff | STEELHEAD LNG (ASLNG) LTD. | Company | LNG project developer — holder of CA3027085A1 covering liquefaction apparatus and systemsSearch in Eureka ↗ |
| Defendant | ARC RESOURCES LTD. | Company | ARC Resources Ltd. — major Canadian upstream energy and natural gas producerSearch in Eureka ↗ |
| Plaintiff counsel | Andrea Rico Wolf | Attorney | Counsel for STEELHEAD LNG (ASLNG) LTD.Search in Eureka ↗ |
| Plaintiff counsel | Dylan Gibbs | Attorney | Counsel for STEELHEAD LNG (ASLNG) LTD.Search in Eureka ↗ |
| Plaintiff counsel | Kevin Siu | Attorney | Counsel for STEELHEAD LNG (ASLNG) LTD.Search in Eureka ↗ |
| Plaintiff counsel | Tim Gilbert | Attorney | Counsel for STEELHEAD LNG (ASLNG) LTD.Search in Eureka ↗ |
| Plaintiff counsel | Vik Tenekjian | Attorney | Counsel for STEELHEAD LNG (ASLNG) LTD.Search in Eureka ↗ |
| Plaintiff law firm | Gilbert’s LLP | Law Firm | Representing STEELHEAD LNG (ASLNG) LTD.Search in Eureka ↗ |
| Defendant counsel | Andrew Brodkin | Attorney | Counsel for ARC RESOURCES LTD.Search in Eureka ↗ |
| Defendant counsel | Daniel Cappe | Attorney | Counsel for ARC RESOURCES LTD.Search in Eureka ↗ |
| Defendant law firm | Goodmans LLP | Law Firm | Representing ARC RESOURCES LTD.Search in Eureka ↗ |
| Presiding judge | Judge N/A | Judge | Canada Federal Court of AppealSearch in Eureka ↗ |
Official order — verbatim text
The Federal Court of Appeal’s language is notably unequivocal: it found ‘nothing inventive’ in the impugned claims at the highest level of generality — and confirmed that appellants failed to displace this under the palpable and overriding error standard. This phrasing forecloses the possibility that any individual claim element was considered inventive in isolation. The costs order, including the structured written submissions process for potential elevated costs, further signals the court viewed the appeal as insufficiently meritorious to avoid enhanced cost consequences.
CA3027085A1 — LNG Liquefaction Apparatus, Methods and Systems
CA3027085A1 is a Canadian patent application covering liquefaction apparatus, methods, and systems — the core technological infrastructure enabling natural gas to be cooled to liquid form for storage and export as LNG. The patent’s application number designation (‘A1’) indicates a published application under the Canadian Patent Act. The technology domain sits at the intersection of thermodynamic process engineering and industrial gas handling, covering apparatus configurations and operational methods that are central to LNG terminal and modular liquefaction project development.
In the context of Canada’s expanding LNG export ambitions — anchored by projects on the British Columbia coast — patent rights over liquefaction apparatus and methods carry significant commercial weight. A valid and enforceable patent in this space could restrict competing developers and equipment suppliers from employing specific liquefaction configurations without licence. The Federal Court’s invalidity ruling, now confirmed on appeal, eliminates CA3027085A1 as a barrier to entry in this technology space, but the ruling also signals that prior art in LNG liquefaction is dense — a strategic consideration for any party seeking broad protection in this sector.
Should your LNG project team run an FTO against CA3027085A1?
CA3027085A1 has been judicially invalidated by the Canadian Federal Court and that ruling confirmed on appeal — meaning the patent no longer poses an infringement risk in Canada for LNG liquefaction apparatus and methods as currently construed. However, R&D and project development teams working on LNG liquefaction systems should note that the Steelhead LNG portfolio may include related applications or continuation filings not captured by this ruling. An FTO review remains advisable for any new liquefaction system design or Canadian LNG project financing exercise.
PatSnap Eureka’s FTO Search Agent can map the full Steelhead LNG patent portfolio, identify related family members of CA3027085A1, and cross-reference claim scope against your specific liquefaction apparatus design. For energy project developers, EPC contractors, and equipment suppliers active in Canadian LNG, Eureka provides claim-level analysis that identifies residual risk even where a lead patent has been invalidated — giving your legal and engineering teams a defensible clearance baseline.
Run a freedom-to-operate analysis on CA3027085A1 to assess your product’s exposure
Run FTO in Eureka →Similar LNG and Energy Patent Invalidity Cases at the Federal Court of Appeal
Cases involving invalidity challenges to LNG and gas processing patents before Canadian federal courts, including apparatus and method claims in the energy sector.
What this case signals for the Canadian LNG and energy IP landscape
The appeal dismissal in A-361-23 has tangible implications for patent strategy, FTO analysis, and claim drafting across the Canadian LNG sector.
Canada’s palpable error standard makes trial-level invalidity findings hard to reverse
Patent holders appealing invalidity rulings in Canada face a structurally difficult path. The palpable and overriding error standard applied here gives substantial deference to trial court fact-finding on prior art and obviousness. This case reinforces that robust claim construction and inventiveness arguments must be built at the trial level — appellate correction is rarely available.
LNG liquefaction apparatus claims face elevated obviousness risk under Canadian law
The Federal Court found nothing inventive in the impugned claims given the prior art state — a conclusion the appeal court found unreviewable. For IP teams in the LNG and gas processing sector, this suggests that apparatus and method claims that map closely to established engineering configurations require clear differentiation from prior art to survive Canadian invalidity challenges.
STEELHEAD v ARC — key questions answered
The Federal Court of Appeal dismissed Steelhead LNG’s appeal in December 2024, confirming the Federal Court’s invalidity ruling on CA3027085A1. The appellants failed to demonstrate palpable and overriding error in the lower court’s finding that the impugned claims lacked inventiveness over the prior art. Costs were awarded against Steelhead LNG, with the quantum of potentially elevated costs subject to written submissions.
In Canadian appellate courts, findings of fact and mixed fact and law made at trial are reviewable only where the appellant demonstrates a ‘palpable and overriding error’ — an error that is obvious and material to the outcome. This is a highly deferential standard that makes reversing trial-level invalidity findings difficult. In A-361-23, the Federal Court of Appeal found Steelhead LNG did not meet this threshold, leaving the invalidity ruling intact.
Based on the public record, CA3027085A1’s impugned claims were found invalid by the Federal Court — a ruling confirmed on appeal in A-361-23. The patent is not enforceable as to those invalidated claims in Canada. Parties should verify whether any claims were severed or remain valid, and should review related Steelhead LNG patent family members for residual exposure.
The Federal Court found nothing inventive in the impugned claims of CA3027085A1 at the highest level of generality, based on the state of the prior art and the specific facts of the case. The Federal Court of Appeal’s dismissal language confirms this was an obviousness-based invalidity conclusion — consistent with the Canadian Patent Act’s requirement that patentable inventions not be obvious to a person skilled in the art.
Steelhead LNG was represented by Gilbert’s LLP, with counsel including Tim Gilbert, Andrea Rico Wolf, Dylan Gibbs, Kevin Siu, and Vik Tenekjian. ARC Resources was represented by Goodmans LLP, with counsel Andrew Brodkin and Daniel Cappe. The respondents’ successful appeal, together with an oral request for elevated costs, suggests an effective defence strategy by the Goodmans team.
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