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American Regent v. Meitheal: Selenious Acid Patent Consent Judgment | PatSnap
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Case ID2:25-cv-01278
FiledFeb 2025
ClosedFeb 2025
Patent Litigation

American Regent v. Meitheal: Selenious Acid ANDA Dispute Ends in 7-Day Consent Judgment

American Regent, Inc. filed suit against Meitheal Pharmaceuticals and Kindos Pharmaceuticals over ANDA No. 219472 — a generic selenious acid injection (600 mcg/10 mL) — asserting US12150957B2 and US11998565B2. The parties resolved the dispute within just 7 days via a consent judgment that enjoins Meitheal/Kindos from commercialising the generic product without authorisation.

Resolution time
7days
7 days — exceptionally fast resolution, well below typical ANDA litigation timelines of 12–24 months
Patents asserted
2
US12150957B2 and US11998565B2 — two patents covering selenious acid injectable formulation (600 mcg/10 mL)
Outcome
Consent Judgment
Injunction entered by agreement; claims dismissed without prejudice per stipulation
Cost ruling
No Costs Awarded
Dismissed without costs, disbursements, or attorneys’ fees to any party
Published by PatSnap Insights Team · Verified by PatSnap Eureka Data
Case overview

A 7-Day ANDA Settlement That Locks In an Injunction for ARI

On 14 February 2025, American Regent, Inc. filed a patent infringement action in the New Jersey District Court against Meitheal Pharmaceuticals, Inc. and its manufacturing partner Kindos Pharmaceuticals Co., Ltd. The complaint centred on Meitheal’s Abbreviated New Drug Application No. 219472, which sought FDA approval for a generic version of ARI’s selenious acid injection — a parenteral selenium supplement dosed at 600 mcg per 10 mL. ARI asserted two patents: US12150957B2 and US11998565B2, both covering aspects of the selenious acid formulation.

The case closed just seven days later, on 21 February 2025, via a consent judgment and stipulated injunction. Under the terms, Meitheal and Kindos are enjoined from making, selling, importing, or distributing the ANDA product in the United States without ARI’s authorisation. All claims and counterclaims were dismissed without prejudice and without costs to any party, and the court retained jurisdiction to enforce the settlement agreement. The underlying commercial terms are contained in a confidential Settlement Agreement not disclosed in the public record.

A seven-day resolution is highly atypical for ANDA litigation, which typically runs for years under the Hatch-Waxman framework. The speed suggests the parties had pre-filing negotiations substantially advanced before the complaint was filed — a common but strategically significant approach where litigation is used to formalise and enforce an already-negotiated deal. The reservation of paragraph IV certification rights for Meitheal/Kindos suggests the settlement may contemplate a future licensed entry date, though the public record does not confirm this.

Case at a glance
Case no.2:25-cv-01278
CourtNew Jersey
JudgeN/A
FiledFebruary 14, 2025
ClosedFebruary 21, 2025
Duration7 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 7 days

7 days — exceptionally fast resolution, well below typical ANDA litigation timelines of 12–24 months

Case timeline: Complaint filed FEB 14 2025, FEB–MAR — 7 days total Horizontal timeline showing the three key events in American Regent, Inc. v Meitheal Pharmaceuticals, Inc. from filing to resolution. Source: PACER, New Jersey District Court. FEB 14 2025 Complaint filed Pre-trial proceedings FEB 21 2025 Consent Judgment 7 DAYS TOTAL
Dismissal terms

Consent judgment with injunction: what the resolution means for both parties

Legal mechanism

Consent judgment is a court-enforceable settlement — not a merits ruling

A consent judgment is a negotiated resolution entered as a binding court order, giving it the force of judicial enforcement. Unlike a voluntary dismissal, the injunction here is court-ordered, meaning violation by Meitheal/Kindos can be pursued as contempt of court. No finding of infringement or validity was made on the merits — the outcome reflects commercial agreement, not adjudication.

Stipulated injunction entered
Patent holder outcome

ARI secures injunction without litigation risk to patent validity

By resolving via consent judgment, ARI obtained an enforceable injunction blocking Meitheal/Kindos from commercialising the generic without authorisation — and did so without exposing US12150957B2 or US11998565B2 to invalidity challenge at trial or in IPR proceedings arising from this dispute. ARI’s commercial exclusivity over its selenious acid product is preserved, at least until the Settlement Agreement permits entry.

Exclusivity preserved
Challenger outcome

Meitheal retains ANDA and paragraph IV rights — suggesting future entry

Critically, the consent judgment expressly preserves Meitheal/Kindos’s right to maintain or refile paragraph IV certifications against the Licensed ARI Patents. This is a strong signal that the Settlement Agreement likely includes an agreed future launch date. The ANDA itself remains intact, and FDA approval is not blocked. Meitheal’s strategic position is deferred entry rather than permanent exclusion.

Para. IV rights preserved
Commercial implications

Hatch-Waxman ‘filing-as-formality’ pattern raises monitoring flags for competitors

The 7-day resolution is consistent with a litigation-formalised licensing strategy, where the lawsuit is filed to trigger the 30-month stay and then resolved on agreed terms. For other generic manufacturers monitoring the selenious acid space, this pattern suggests ARI may be managing market entry through licensing rather than hard exclusion. Third-party ANDA filers should monitor the Settlement Agreement’s authorised entry date if and when it becomes discoverable.

Likely licensed-entry deal
Legal analysis based on PACER docket records for case 2:25-cv-01278 and PatSnap Eureka litigation intelligence Search PatSnap Eureka ↗
Parties and representation

Full party and counsel information

RoleNameTypeDetail
PlaintiffAmerican Regent, Inc.CompanyPharmaceutical company — holder of US12150957B2 and US11998565B2 covering selenious acid injectionSearch in Eureka ↗
DefendantMeitheal Pharmaceuticals, Inc.CompanyGeneric drug manufacturer; filed ANDA No. 219472 for generic selenious acid 600 mcg/10 mLSearch in Eureka ↗
Plaintiff counselCharles H. ChevalierAttorneyCounsel for American Regent, Inc.Search in Eureka ↗
Plaintiff law firmGibbons PCLaw FirmRepresenting American Regent, Inc.Search in Eureka ↗
Presiding judgeJudge N/AJudgeNew Jersey District CourtSearch in Eureka ↗
Official verdict

Official order — verbatim text

“Plaintiff American Regent, Inc. (“ARI”), and Defendants Meitheal Pharmaceuticals, Inc. (“Meitheal”) and Kindos Pharmaceuticals Co., Ltd (“Kindos”) (collectively, “Meitheal/Kindos”), parties in the above-captioned action, have resolved this litigation for good cause and valuable consideration recognized by ARI and Meitheal/Kindos. Now the parties, by their respective undersigned attorneys, hereby stipulate and consent to entry of judgment and an injunction in the action, as follows: IT IS this _____ day of ___________, 2025: 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 “Meitheal/Kindos Product” shall mean the drug product manufactured, sold, offered for sale or distributed pursuant to Abbreviated New Drug Application No. 219472 (including any supplements, or modification or amendments thereto or replacements thereof) (the “Meitheal/Kindos ANDA”); (ii) the term “Licensed ARI Patent” shall mean United States Patent Nos. 11,998,565 (“the ’565 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 Meitheal/Kindos; 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), Meitheal/Kindos, including any of its Affiliates, successors and assigns, is enjoined from infringing the Licensed ARI Patent, on its own part or through any Affiliate, by making, having made, using, selling, offering to sell, importing or distributing of the Meitheal/Kindos Product 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 action are hereby dismissed without prejudice and without costs, disbursements or attorneys’ fees to any party. 7. Nothing herein prohibits or is intended to prohibit Meitheal/Kindos from maintaining and/or filing (e.g., in the case of a recertification pursuant to 21 C.F.R. § 314.96(d)) a “paragraph IV” certification pursuant to 21 U.S.C. § 355(j)(2)(A)(vii)(IV) or pursuant to 21 C.F.R. 314.94(a)(12) with respect to the Licensed ARI Patent. 8. Nothing herein shall preclude the U.S. Food & Drug Administration from granting final approval to the Meitheal/Kindos ANDA.”
Source: PACER Docket, Case 2:25-cv-01278, New Jersey District Court

The consent judgment is notable for what it does and does not establish. It creates a judicially enforceable injunction — meaning any future breach by Meitheal/Kindos is actionable as contempt — but makes no finding on infringement or patent validity. The explicit carve-out preserving paragraph IV certification rights (Clause 7) and the FDA approval savings clause (Clause 8) are standard Hatch-Waxman settlement architecture, consistent with a negotiated future authorised entry date embedded in the undisclosed Settlement Agreement.

PACER case 2:25-cv-01278 · Public docket record Explore in Eureka ↗
Patent at issue

US12150957B2 & US11998565B2 — Selenious Acid Injectable Formulations

Publication No.US12150957B2
Application No.US18/672876
Patent details
Productselenious acid injectable selenium formulation and methods of use
Cited in actionFebruary 14, 2025

Publication No.US11998565B2
Application No.US18/124391
Patent details
Productselenious acid parenteral supplement compositions (600 mcg/10 mL)
Cited in actionFebruary 14, 2025

US12150957B2 (application US18/672876) and US11998565B2 (application US18/124391) both protect aspects of ARI’s selenious acid injectable product — a sterile parenteral formulation delivering 60 mcg selenium per mL (600 mcg per 10 mL vial). The relatively recent application numbers and granted patent numbers suggest these are newer patents in ARI’s portfolio, likely reflecting reformulation or stability innovations rather than foundational selenium chemistry, though the full claim scope requires independent review.

Selenious acid injections are critical components of parenteral nutrition protocols, used in patients who cannot receive enteral nutrition. ARI’s commercial product occupies a specialised niche with limited generic competition. By asserting two patents covering the formulation, ARI creates a layered exclusivity position that generic entrants must navigate on two fronts — increasing the cost and risk of ANDA-based market entry. The consent judgment reinforces the commercial durability of this patent stack.

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

Should you run an FTO against US12150957B2 and US11998565B2?

Any company developing a parenteral selenium formulation — whether an ANDA filer, a 505(b)(2) applicant, or an innovator developing a next-generation selenious acid product — should run a freedom-to-operate analysis against both US12150957B2 and US11998565B2. The consent judgment in this case demonstrates that ARI is actively enforcing these patents and is willing to move quickly. A pre-ANDA FTO can identify design-around opportunities or invalidity arguments before litigation exposure arises.

PatSnap Eureka’s FTO Search Agent can map the claim scope of both patents against your formulation parameters, identify prior art relevant to validity challenges, and flag related continuation applications that may extend ARI’s exclusivity window. Given the 7-day litigation cycle here, having an FTO completed before ANDA submission — not after — is the operationally sound approach for any injectables manufacturer in the parenteral nutrition space.

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Related litigation

Similar ANDA Patent Infringement Cases — Parenteral Formulations

Explore comparable Hatch-Waxman ANDA infringement cases involving parenteral and injectable formulation patents litigated in New Jersey District Court.

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Strategic implications

What this case signals for the parenteral nutrition IP landscape

A 7-day ANDA consent judgment with an injunction and preserved paragraph IV rights is a textbook strategic settlement — here is what it means.

Speed of resolution signals pre-litigation deal structure in ANDA cases

When an ANDA infringement case closes within one week of filing, it typically indicates the parties had already negotiated core commercial terms before the complaint was filed. Patent counsel monitoring the selenious acid or broader parenteral nutrition space should treat this as a licensing event, not a litigation win — the injunction formalises an agreement rather than adjudicating infringement.

ARI’s two-patent stack creates a compounding exclusivity barrier for future ANDA filers

With both US12150957B2 and US11998565B2 now backed by a court-ordered injunction in a precedent-setting consent judgment, future generic challengers face a higher practical barrier. Any new ANDA filer will need to design around or challenge both patents — and ARI can point to this consent judgment as evidence of commercial validity of its patent position.

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Authorised entry date signalsSupply chain enforcement riskCompeting ANDA landscape
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Frequently asked questions

American v Meitheal — key questions answered

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Monitor parenteral nutrition patent enforcement before your next ANDA filing

ARI’s rapid enforcement of US12150957B2 and US11998565B2 signals an active litigation posture in the selenious acid space. Use PatSnap Eureka to run FTO searches, track Orange Book listings, and monitor new ANDA challenges before they become injunctions.

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