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American Regent v. Endo Operations: Tralement Patent Consent Judgment | PatSnap
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Case ID2:25-cv-11945
FiledJun 2025
ClosedJul 2025
Patent Litigation

American Regent v. Endo Operations: Tralement Trace Elements Patent Dispute Ends in 30-Day Consent Judgment

American Regent, Inc. filed suit against Endo Operations Limited in New Jersey District Court, asserting five patents covering its Tralement trace elements injection 4* product against Endo’s ANDA No. 219680. The parties resolved the dispute via a consent judgment and accompanying settlement agreement in just 30 days — among the fastest resolutions seen in ANDA patent litigation.

Resolution time
30days
Resolved in 30 days — well below the typical 2–4 year ANDA litigation timeline
Patents asserted
5
US11786548, US11975022, US11998565, US12150956, US12150957 — five patents covering trace elements injection 4* (Tralement)
Outcome
Consent Judgment
Settled by consent judgment; all claims dismissed without prejudice, no costs awarded
Cost ruling
No Award
Each party bears its own costs, expenses, and attorneys’ fees
Published by PatSnap Insights Team · Verified by PatSnap Eureka Data
Case overview

Five-patent ANDA assault on Tralement generic ends before discovery opens

On June 18, 2025, American Regent, Inc. (ARI) filed an infringement action in the U.S. District Court for the District of New Jersey against Endo Operations Limited, asserting five patents — US11786548, US11975022, US11998565, US12150956, and US12150957 — against Endo’s Abbreviated New Drug Application No. 219680, which covers a proposed generic version of Tralement® (trace elements injection 4*, USP) in 1 mL single-dose and 5 mL pharmacy bulk package vials.

By July 18, 2025 — exactly 30 days after filing — the parties entered a consent judgment and settlement agreement. Under the consent judgment, Endo and its affiliates are enjoined from infringing the five ‘Licensed ARI Patents’ unless specifically authorized by ARI or by the safe-harbor provision at 35 U.S.C. § 271(e)(1). All claims, counterclaims, and affirmative defenses were dismissed without prejudice and without costs to either party, with the court retaining jurisdiction to supervise compliance.

A 30-day resolution strongly suggests the parties entered settlement negotiations in parallel with — or even prior to — filing suit, a pattern common in Hatch-Waxman litigation where commercial launch timelines create mutual pressure to resolve. The consent judgment preserves ARI’s enforcement rights through the settlement agreement and notably does not prevent FDA from granting final approval of Endo’s ANDA, suggesting a future authorized or licensed entry may be contemplated. The specific terms of the underlying settlement agreement are not public.

Case at a glance
Case no.2:25-cv-11945
CourtNew Jersey
JudgeN/A
FiledJune 18, 2025
ClosedJuly 18, 2025
Duration30 days
OutcomeConsent Judgment
Verdict causeInfringement Action
BasisConsent Judgment
Prior Art Intelligence
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Case data sourced from PACER / New Jersey District Court via PatSnap Eureka Litigation Intelligence Explore similar cases ↗
Case timeline

Filing to Consent Judgment in 30 days

Resolved in 30 days — well below the typical 2–4 year ANDA litigation timeline

Case timeline: Complaint filed JUN 18 2025, JUL–AUG — 30 days total Horizontal timeline showing the three key events in American Regent, Inc. v ENDO OPERATIONS LIMITED from filing to resolution. Source: PACER, New Jersey District Court. JUN 18 2025 Complaint filed Pre-trial proceedings JUL 18 2025 Consent Judgment 30 DAYS TOTAL
Dismissal terms

Consent judgment explained: what the 30-day resolution means for both parties

Legal mechanism

Consent judgment: a court-enforceable settlement binding both parties

A consent judgment is a negotiated resolution entered as a court order, giving it the enforceability of a judicial decree — not merely a private contract. Here, the New Jersey District Court retains jurisdiction to supervise compliance. Dismissal ‘without prejudice’ means ARI could theoretically refile claims if Endo launches outside agreed terms, preserving ARI’s enforcement leverage.

Court-ordered settlement
Patent holder outcome

ARI secures injunction and enforcement rights over all five patents

American Regent obtained a binding injunction against Endo and all affiliates, successors, and assigns — covering making, selling, importing, or distributing the ANDA product in the U.S. without ARI’s authorization. The court’s retention of jurisdiction strengthens ARI’s ability to enforce compliance swiftly, without refiling. The ‘without prejudice’ dismissal preserves ARI’s full claim toolkit if the settlement is breached.

Injunction secured
Generic challenger outcome

Endo avoids validity trial but accepts patent licence constraints

Endo avoids a potentially lengthy trial challenging ARI’s five patents — and the associated cost and uncertainty — but accepts an injunction and enters a settlement agreement whose commercial terms are not public. Critically, the consent judgment explicitly preserves Endo’s right to maintain Paragraph IV certifications and receive FDA approval, suggesting a negotiated future market entry date may form part of the private settlement.

Market entry deferred
Commercial implications

ARI’s Tralement patent portfolio reinforced across five U.S. patents

The consent judgment signals that ARI’s five-patent thicket around trace elements injection 4* is commercially credible enough to compel early settlement. Other potential ANDA filers should treat these patents as a serious enforcement risk. The carve-out preserving Paragraph IV certification rights is consistent with a delayed or licensed generic entry, which is a standard outcome in Hatch-Waxman settlements and typically includes a negotiated launch date.

Patent thicket reinforced
Legal analysis based on PACER docket records for case 2:25-cv-11945 and PatSnap Eureka litigation intelligence Search PatSnap Eureka ↗
Parties and representation

Full party and counsel information

RoleNameTypeDetail
PlaintiffAmerican Regent, Inc.CompanyPharmaceutical company — holder of US11786548, US11975022, US11998565, US12150956 & US12150957 covering TralementSearch in Eureka ↗
DefendantENDO OPERATIONS LIMITEDIndividualEndo Operations Limited — ANDA filer seeking to market a generic trace elements injection 4* productSearch in Eureka ↗
Plaintiff counselCharles H. ChevalierAttorneyCounsel for American Regent, Inc.Search in Eureka ↗
Plaintiff counselChristine A. GaddisAttorneyCounsel for American Regent, Inc.Search in Eureka ↗
Plaintiff law firmGibbons PCLaw FirmRepresenting American Regent, Inc.Search in Eureka ↗
Defendant counselNicole Gerritsen McdonoughAttorneyCounsel for ENDO OPERATIONS LIMITEDSearch in Eureka ↗
Defendant law firmSills Cummis & Gross PCLaw FirmRepresenting ENDO OPERATIONS LIMITEDSearch in Eureka ↗
Presiding judgeJudge N/AJudgeNew Jersey District CourtSearch in Eureka ↗
Official verdict

Official order — verbatim text

“ORDERED, ADJUDGED AND DECREED as follows: 1. This District Court has jurisdiction over the subject matter of the above Action and has personal jurisdiction over the parties. 2. As used in this Consent Judgment, (i) the term "ENDO Product(s)" shall mean the drug product(s) manufactured, sold, offered for sale or distributed pursuant to Abbreviated New Drug Application No. 219680 (including any supplements, or modification or amendments thereto or replacements thereof) ("ENDO’s ANDA"); (ii) the term "Licensed ARI Patents" shall mean United States Patent Nos.: 11,786,548 ("the `548 Patent"); 11,975,022 ("the `022 Patent"); 11,998,565 ("the ‘565 Patent"); 12,150,956 ("the `956 Patent") and 12,150,957 ("the ‘957 Patent"); and (iii) the term "Affiliate" shall mean any entity or person that, directly or indirectly through one or more intermediaries, controls, is controlled by, or is under common control with ENDO; for purposes of this definition, "control" means: (a) ownership, directly or through one or more intermediaries, of: (1) more than fifty percent (50%) of the shares of stock entitled to vote for the election of directors, in the case of a corporation, or (2) more than fifty percent (50%) of the equity interests in the case of any other type of legal entity or status as a general partner in any partnership; or (b) any other arrangement whereby an entity or person has the right to elect a majority of the Board of Directors or equivalent governing body of a corporation or other entity or the right to direct the management and policies of a corporation or other entity. 3. Unless otherwise specifically authorized by ARI pursuant to the Settlement Agreement or by 35 U.S.C. § 271(e)(1), ENDO, including any of its Affiliates, successors and assigns, is enjoined from infringing the Licensed ARI Patents, on its own part or through any Affiliate, by making, having made, using, selling, offering to sell, importing or distributing of the ENDO Product(s) in the United States. 4. Compliance with this Consent Judgment may be enforced by ARI, its successors in interest, or assigns, as permitted by the terms of the Settlement Agreement. 5. This District Court retains jurisdiction to enforce or supervise performance under this Consent Judgment and the Settlement Agreement. 6. All claims, counterclaims, affirmative defenses and demands in this Actions are hereby dismissed without prejudice and without costs, disbursements or attorneys’ fees to any party. Each party shall bear its own costs, expenses, and attorneys’ fees incurred in connection with the claims dismissed by this Consent Judgment. 7. Nothing herein shall preclude the U.S. Food & Drug Administration from granting final approval to ENDO’s ANDA or shall preclude ENDO from filing, modifying, or maintaining with the FDA any Paragraph IV Certification for the ENDO Product(s) pursuant to 21 U.S.C. § 355(j)(2)(A)(vii)(IV).”
Source: PACER Docket, Case 2:25-cv-11945, New Jersey District Court

The consent judgment is notable for its dual character: it functions simultaneously as a settlement instrument and a court order carrying full judicial enforcement weight. The injunction binds not only Endo but all affiliates, successors, and assigns — a broad scope that is standard in Hatch-Waxman consent judgments but significant for any entity acquiring Endo’s ANDA assets. The explicit preservation of FDA approval rights and Paragraph IV certification maintenance is a deliberate drafting choice consistent with a future authorized generic or licensed-entry arrangement under the private settlement agreement, the terms of which are not part of the public record.

PACER case 2:25-cv-11945 · Public docket record Explore in Eureka ↗
Patent at issue

US11786548, US11975022, US11998565, US12150956 & US12150957 — Tralement trace elements injection 4* patent portfolio

Publication No.US12150956B2
Application No.US18/653608
Patent details
Producttrace elements injection 4* formulation covering Tralement 1 mL and 5 mL vial presentations
Cited in actionJune 18, 2025

Publication No.US12150957B2
Application No.US18/672876
Patent details
Producttrace elements injection 4* formulation and dosing methods
Cited in actionJune 18, 2025

Publication No.US11975022B2
Application No.US18/482612
Patent details
Producttrace elements injection 4* compositions and methods of use
Cited in actionJune 18, 2025

Publication No.US11998565B2
Application No.US18/124391
Patent details
Producttrace elements injection 4* pharmaceutical formulation methods
Cited in actionJune 18, 2025

Publication No.US11786548B2
Application No.US17/365695
Patent details
Producttrace elements injection 4* USP compositions and administration methods
Cited in actionJune 18, 2025

The five asserted patents — US11786548 (app. US17/365695), US11975022 (app. US18/482612), US11998565 (app. US18/124391), US12150956 (app. US18/653608), and US12150957 (app. US18/672876) — collectively protect formulations and methods relating to trace elements injection 4* (USP), the active pharmaceutical ingredient class underlying ARI’s branded Tralement product. Application dates spanning 2021 to 2024 suggest a multi-wave prosecution strategy designed to extend portfolio coverage as the product’s commercial lifecycle matured.

From a competitive intelligence perspective, the five-patent assertion against a single ANDA is a deliberate portfolio stacking strategy. The filing of patents across at least four distinct application numbers — including what appear to be continuation applications — suggests additional pending claims may exist in these families. For any company developing or acquiring parenteral trace element products, this portfolio represents a meaningful freedom-to-operate risk that extends beyond the five issued patents currently listed in the Orange Book.

Patent data sourced from USPTO via PatSnap Eureka patent database Search patent records in Eureka ↗
Freedom to operate

Should you run an FTO against ARI’s trace elements injection 4* patent portfolio?

Any pharmaceutical company developing, acquiring, or in-licensing a generic trace elements injection 4* product — including USP-compliant formulations in single-dose or pharmacy bulk package vials — should treat ARI’s five-patent cluster as a primary FTO target. The consent judgment confirms that ARI will enforce these patents aggressively, and the multi-application family structure means continuation risk is real. An FTO limited to issued patents alone is likely insufficient.

PatSnap Eureka’s FTO Search Agent enables R&D and IP teams to map all granted and pending claims across ARI’s trace elements injection application families, identify claim scope overlaps with proposed formulations, and flag continuation applications that may mature into additional blocking patents. Running a full family analysis — not just issued patent searches — is essential before any ANDA filing or product development milestone in this space.

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Related litigation

Similar ANDA patent infringement cases in pharmaceutical trace elements and parenteral nutrition

Explore comparable Hatch-Waxman infringement actions involving parenteral nutrition and trace element injection patents filed in New Jersey District Court.

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Strategic implications

What this case signals for the parenteral nutrition IP landscape

A 30-day ANDA consent judgment involving five patents and a court-retained injunction carries clear signals for generic pharmaceutical competitors and IP teams.

Early consent judgments signal a strong patent position — monitor closely

When an ANDA defendant settles within 30 days and accepts a court-enforceable injunction, it strongly suggests the patent holder’s position was perceived as commercially and legally credible. IP teams tracking the parenteral nutrition and trace elements injection space should treat ARI’s five-patent portfolio as a high-enforcement-risk cluster.

The Paragraph IV carve-out is the key commercial signal to watch

The consent judgment explicitly preserves Endo’s right to maintain Paragraph IV certifications and receive FDA approval. In Hatch-Waxman practice, this clause is typically paired with a negotiated authorised entry date in the private settlement. R&D and commercial teams should monitor Endo’s ANDA No. 219680 for FDA action as a proxy for the agreed launch window.

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Unlock deeper analysis of ARI’s trace elements patent portfolio strategy and NJ District Court ANDA settlement patterns.
Patent family gap analysisNJ ANDA settlement trendsAuthorised entry date signals
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Frequently asked questions

American v ENDO — key questions answered

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Track parenteral nutrition patent enforcement before your next ANDA filing

PatSnap Eureka’s FTO Search Agent and litigation monitor help pharmaceutical IP teams map ARI’s five-patent Tralement portfolio, identify continuation risk, and track Orange Book patent listings before committing to generic development programmes.

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