Actelion v. Gland Pharma: VELETRI® Patent Consent Judgment — 564 Days
Actelion Pharmaceuticals filed suit in Delaware against generic challenger Gland Pharma over US8598227, protecting epoprostenol sodium for injection sold as VELETRI®. The case resolved in 564 days via a consent judgment that validated the patent and enjoined Gland’s generic from the US market until patent expiry.
Hatch-Waxman ANDA consent judgment shields VELETRI® until expiry
Actelion Pharmaceuticals Ltd filed this action on 5 April 2024 in the United States District Court for the District of Delaware, asserting infringement of US8598227 — a patent covering formulations of epoprostenol sodium for injection commercialised as VELETRI®. The trigger was Gland Pharma’s ANDA No. 219237 containing a Paragraph IV certification, a statutory act of infringement under 35 U.S.C. §271(e)(2)(A) that required Actelion to respond to protect its NDA No. 022260 franchise.
The action closed on 21 October 2025 through a consent judgment agreed by both parties. The court found subject matter jurisdiction, personal jurisdiction, and venue all proper. Critically, Gland’s ANDA filing was adjudicated a technical act of infringement and the asserted claims of the ‘227 patent were declared valid and enforceable. An injunction was entered barring Gland from manufacturing, selling, or importing its generic product in the United States until the ‘227 patent expires, including any term extensions. Both parties agreed to bear their own fees and waived any right of appeal.
Resolution in 564 days — before reaching any Markman hearing or trial — suggests the parties identified an acceptable commercial arrangement relatively early in the litigation lifecycle. The consent judgment preserves Gland’s ANDA and allows FDA to grant final approval; Gland retains the right to enter the market under a written authorisation from Actelion, consistent with a potential future licensing arrangement the public record does not disclose. Whether royalties or milestone payments underpin the settlement is not reflected in publicly available filings.
Filing to Consent Judgment in 564 days
564 days — below the median ANDA Hatch-Waxman trial timeline of ~730 days
Consent judgment: what the agreed order means for both parties
Consent judgment is a court-enforceable agreed order
A consent judgment is not a unilateral dismissal — it is a binding court order entered on the parties’ agreement. Here it simultaneously adjudicates infringement and validity in Actelion’s favour and imposes an injunction. Because the parties expressly waived appeal, the order is final. All remaining claims, defences, and counterclaims were dismissed without prejudice, preserving theoretical future issues not addressed by the order.
Binding — appeal waivedActelion secures patent validation and market exclusivity
The consent judgment delivers Actelion the core relief sought in any ANDA case: a court declaration that ‘227 patent claims are valid and enforceable and a market-blocking injunction against Gland’s generic. VELETRI® retains protected US market access until patent expiry. The order also allows Actelion to selectively authorise Gland’s entry in writing — preserving optionality for a future authorised generic arrangement without reopening litigation.
Injunction secured — market protectedGland enjoined but ANDA preserved for future authorised entry
Gland cannot launch its generic epoprostenol sodium in the US without Actelion’s written consent until the ‘227 patent expires. However, the ANDA itself remains intact — FDA is not restricted from granting final approval, and Gland retains the right to file or maintain a Paragraph IV certification. This structure is consistent with an authorised generic or licence arrangement taking effect at or before patent expiry, though no such terms are publicly disclosed.
Enjoined — ANDA intactReinforced exclusivity pattern for branded PAH therapies
The outcome is consistent with a wider industry pattern in which branded pulmonary arterial hypertension (PAH) drug holders secure consent judgments that delay generic entry to patent expiry while leaving a licensed entry pathway open. Other generic manufacturers with ANDA filings on epoprostenol formulations should assess the ‘227 patent’s remaining term and any pending term extensions before committing to litigation-only strategies, as consent-based resolutions raise the cost baseline for holdout challengers.
PAH exclusivity extendedFull party and counsel information
| Role | Name | Type | Detail |
|---|---|---|---|
| Plaintiff | Actelion Pharmaceuticals, Ltd. | Company | Pharmaceutical innovator — holder of US8598227 covering VELETRI® epoprostenol sodium injectionSearch in Eureka ↗ |
| Defendant | Gland Pharma, Ltd. | Company | Gland Pharma Ltd — Indian generic pharmaceutical manufacturer, ANDA filer for generic epoprostenol sodiumSearch in Eureka ↗ |
| Plaintiff counsel | Jack B. Blumenfeld | Attorney | Counsel for Actelion Pharmaceuticals, Ltd.Search in Eureka ↗ |
| Plaintiff counsel | Jeremy A. Tigan | Attorney | Counsel for Actelion Pharmaceuticals, Ltd.Search in Eureka ↗ |
| Plaintiff counsel | Lisa Glasser | Attorney | Counsel for Actelion Pharmaceuticals, Ltd.Search in Eureka ↗ |
| Plaintiff law firm | Morris, Nichols, Arsht & Tunnell LLP | Law Firm | Representing Actelion Pharmaceuticals, Ltd.Search in Eureka ↗ |
| Defendant counsel | Charles K. Shih | Attorney | Counsel for Gland Pharma, Ltd.Search in Eureka ↗ |
| Defendant counsel | Dominick T. Gattuso | Attorney | Counsel for Gland Pharma, Ltd.Search in Eureka ↗ |
| Defendant counsel | Emer Simic | Attorney | Counsel for Gland Pharma, Ltd.Search in Eureka ↗ |
| Defendant counsel | Jeffrey S. Ward | Attorney | Counsel for Gland Pharma, Ltd.Search in Eureka ↗ |
| Defendant law firm | Heyman Enerio Gattuso & Hirzel, LLP | Law Firm | Representing Gland Pharma, Ltd.Search in Eureka ↗ |
| Presiding judge | Judge N/A | Judge | Delaware District CourtSearch in Eureka ↗ |
Official order — verbatim text
The consent judgment is notable for its dual function: it simultaneously resolves the litigation and creates a durable commercial framework. By adjudicating Gland’s ANDA filing as a technical act of infringement and declaring the ‘227 patent valid and enforceable, the order forecloses any estoppel-free re-litigation of those issues between these parties. The injunction’s explicit reference to patent term extensions and adjustments signals that Actelion sought — and obtained — protection against extended-term scenarios. The mutual appeal waiver and own-costs provision suggest a balanced negotiated resolution rather than a one-sided capitulation.
US8598227 — Epoprostenol sodium for injection formulation (VELETRI®)
US8598227 (application no. US13/621,489) covers formulations of epoprostenol sodium for injection — the active pharmaceutical ingredient in VELETRI®, Actelion’s commercially approved prostacyclin analogue for pulmonary arterial hypertension (PAH). VELETRI® is distinguished from earlier epoprostenol products by its thermostability, allowing storage at room temperature without the glycine buffer required by earlier products. The patent’s formulation claims are the commercial core of the NDA 022260 franchise.
From a competitive standpoint, US8598227 represents a significant barrier to generic entry in the US PAH injectable market. Epoprostenol sodium is the first-line intravenous therapy for severe PAH, commanding substantial pricing power and clinical entrenchment. The consent judgment’s validation of the patent’s claims strengthens Actelion’s enforcement posture against any remaining or future ANDA filers targeting the VELETRI® formulation. Companies developing thermostable prostacyclin formulations or alternative delivery systems should conduct a thorough FTO analysis against this patent and its family before IND filing.
Should you run an FTO analysis against US8598227?
Any company developing, manufacturing, or seeking to commercialise epoprostenol sodium injection products in the United States — including reformulations, biosimilar-adjacent generics, or combination device products — should treat US8598227 as a priority FTO target. The consent judgment’s validity finding, while not technically binding on third parties, signals that the patent survived adversarial scrutiny by a well-resourced generic challenger and their litigation counsel.
PatSnap Eureka’s FTO Search Agent can map the full claim scope of US8598227 against your product’s formulation parameters, identify design-around opportunities in the epoprostenol sodium formulation space, and surface related family members or continuation risks. For R&D teams at PAH-focused generics or specialty pharma companies, proactive FTO analysis now is materially cheaper than reactive ANDA litigation later.
Run a freedom-to-operate analysis on US8598227B2 to assess your product’s exposure
Run FTO in Eureka →Similar ANDA patent infringement cases in pharmaceutical formulation
Cases involving Paragraph IV ANDA challenges to pharmaceutical injection formulation patents in Delaware District Court, resolved by consent judgment or settlement.
Related patent case — similar technology
Comparable case in the same technology domain. Patent holder and defendant reached resolution after proceedings.
SettledRelated infringement action — same court
Comparable a generic epoprostenol sodium for injection drug product, 1.5 mg/vial and 0.5 mg/vial-adjacent infringement action. Patent enforcement dynamics analysed in depth.
Active · District CourtRelated invalidity challenge — appellate outcome
Combined invalidity and infringement action in the same technology space. Decided after substantive proceedings.
DecidedActelion Pharmaceuticals, Ltd.’s broader IP enforcement history
Actelion Pharmaceuticals, Ltd.’s full litigation history covering prior enforcement, licensing activity, and inter partes review proceedings.
Portfolio viewWhat this case signals for the ANDA pharmaceutical IP landscape
Consent judgments that validate patents and enjoin generics while preserving ANDA approval rights are a structurally important settlement form in Hatch-Waxman litigation.
Early consent judgments shift leverage back to the innovator quickly
By settling before Markman or trial, Actelion converted a Paragraph IV challenge into a court-validated injunction in under two years. Generic challengers should factor in the reputational and financial cost of contesting well-defended ANDA cases — especially where branded products have established PAH market positions and clinical differentiation.
ANDA preserved with FDA approval pathway — watch for authorised generic deals
The consent judgment’s explicit preservation of Gland’s ANDA and FDA approval pathway is a structural tell: it leaves room for an authorised generic agreement to take effect at or around patent expiry. Competitors and payers monitoring the epoprostenol sodium market should track any FDA tentative approval notices for ANDA 219237 as a proxy for deal timing.
US8598227 term extensions could materially delay Gland’s market entry date
The injunction explicitly extends to any patent term extensions (PTE) and patent term adjustments (PTA) on the ‘227 patent. A PTE under 35 U.S.C. §156 for regulatory review delay could add up to five years to market exclusivity. Competitors should model both base expiry and maximum-extension scenarios before scheduling any generic launch.
Paragraph IV certification preserved — recertification route remains open to Gland
The order permits Gland to file a recertification under 21 C.F.R. §314.96(d) if the ‘227 patent status changes. This means a successful IPR petition filed by a third party against ‘227 could reopen Gland’s freedom to launch — making the patent’s IPR vulnerability a strategically significant variable for all ANDA filers in this space.
Actelion v Gland — key questions answered
The consent judgment declared that Gland’s ANDA filing was a technical act of infringement under 35 U.S.C. §271(e)(2)(A) and that the asserted claims of US8598227 are valid and enforceable. An injunction was entered barring Gland from commercialising its generic epoprostenol sodium product in the US until the ‘227 patent expires, including any term extensions.
Not without Actelion’s written authorisation while the ‘227 patent remains in force. However, the consent judgment preserves Gland’s ANDA (No. 219237) and does not restrict the FDA from granting final approval. Gland may enter the market with Actelion’s written consent, consistent with a potential authorised generic arrangement, or after patent expiry.
A Paragraph IV certification is a statutory declaration by a generic applicant that a listed patent is invalid, unenforceable, or will not be infringed by the generic product. Under Hatch-Waxman (35 U.S.C. §271(e)(2)(A)), filing such a certification is itself a technical act of patent infringement, giving the innovator standing to sue and trigger a 30-month FDA approval stay.
Dismissal without prejudice means the remaining claims, defences, and counterclaims were terminated without a merits ruling and could theoretically be re-filed. In practice, the consent judgment’s injunction and validity findings, combined with the parties’ appeal waiver, make re-litigation between these parties on the same issues commercially and legally unlikely during the patent’s remaining term.
The consent judgment is binding only between Actelion and Gland Pharma and does not create binding precedent on US8598227’s validity for other parties. However, the patent’s survival of a well-resourced Paragraph IV challenge and the court’s formal validity finding may signal enforcement strength that other generic ANDA filers and their counsel should weigh carefully.
Monitor epoprostenol patent risk before your next ANDA filing
US8598227 has been court-validated in a consent judgment. PatSnap Eureka helps generic and specialty pharma teams run FTO searches, track patent expiry and extension filings, and monitor new enforcement actions before committing to ANDA strategy.
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