Allergan v. Mankind Pharma: Bimatoprost Patent Consent Injunction After 596 Days
Allergan and AbbVie filed a Hatch-Waxman infringement action against Mankind Pharma in Delaware over US7851504, protecting LUMIGAN® 0.01% bimatoprost ophthalmic solution. Mankind ultimately admitted the patent was valid, enforceable, and infringed, resulting in a consent injunction blocking generic entry for the life of the patent — a decisive outcome for the brand holder.
Consent Injunction Locks Mankind Out of US Bimatoprost Market
On 13 March 2023, Allergan, Inc. and AbbVie Inc. filed a patent infringement action in the District of Delaware against Mankind Pharma Ltd., an Indian generics manufacturer. The suit arose from Mankind’s submission of Abbreviated New Drug Application (ANDA) 218196 to the FDA, which carried a Paragraph IV certification challenging US7851504B2 — the patent underpinning LUMIGAN® 0.01%, Allergan’s prostaglandin analogue eye-drop therapy indicated for intraocular pressure reduction in glaucoma and ocular hypertension.
The case closed on 29 October 2024 via a court-entered Stipulation and Order. Mankind admitted that the ‘504 patent is valid, enforceable, and that one or more claims would be infringed by commercial manufacture, use, or sale of its proposed generic product. The court formally decreed that ANDA 218196’s filing constituted a technical act of infringement under 35 U.S.C. § 271(e)(2)(A), and issued a permanent injunction barring Mankind from commercialising the generic product in the United States for the full life of the patent, including extensions and paediatric exclusivities.
Resolution after 596 days — without a full trial — suggests the parties likely concluded that the patent’s validity and infringement positions were difficult to contest, consistent with a strategic decision by Mankind to avoid costly litigation. The dismissal without prejudice of remaining claims preserves Mankind’s ability to re-litigate in future actions involving different products, but the injunction itself is binding and enforceable. The public record does not disclose whether any licensing discussions occurred in parallel or whether commercial supply terms were negotiated privately.
Filing to Dismissed without Prejudice in 596 days
596 days to resolution — typical Hatch-Waxman ANDA cases in Delaware average 2–4 years; this resolved within roughly two years via stipulation
Consent injunction entered: what the stipulated order means for both parties
Stipulated infringement admission and consent injunction
Rather than proceeding to trial, the parties entered a court-endorsed Stipulation and Order. Mankind formally admitted patent validity, enforceability, and that commercial launch would infringe. The court then entered a permanent injunction under the same order. This mechanism is common in Hatch-Waxman litigation when a generic filer concludes that its invalidity and non-infringement defences are unlikely to succeed — it avoids trial costs while producing a binding, court-enforceable outcome.
Hatch-Waxman consent orderAllergan secures injunction for full patent life including extensions
The consent order delivers Allergan and AbbVie the strongest available remedy short of a trial win: a permanent injunction blocking Mankind from manufacturing, selling, or importing its generic bimatoprost 0.01% product in the United States for the entire remaining life of US7851504, including any patent term extensions and paediatric exclusivities. Mankind’s admission of validity also strengthens the patent’s standing against future ANDA challengers, though it is expressly limited to this specific product and ANDA.
Permanent injunction securedMankind blocked from US generic launch; Paragraph IV cert may be retained
Mankind is enjoined from commercialising its bimatoprost 0.01% ANDA product in the United States for the life of the ‘504 patent. Notably, the order expressly permits Mankind to maintain its Paragraph IV certification in ANDA 218196 for purposes of receiving or maintaining final FDA approval — meaning the ANDA itself is not abandoned. Both parties waived appeal rights, foreclosing further challenge. The dismissal without prejudice of other claims preserves Mankind’s theoretical ability to litigate different products in future.
Enjoined; appeal waivedBimatoprost 0.01% generic entry delayed; market exclusivity reinforced
The consent injunction reinforces Allergan’s commercial exclusivity over the LUMIGAN® 0.01% formulation in the US market for the remaining patent term. Other ANDA filers targeting the same product will now face a judicial record in which one challenger has admitted validity and infringement — a development that may influence settlement posture or litigation strategy in any parallel ANDA proceedings. Companies developing ophthalmic prostaglandin generics should closely monitor the ‘504 patent’s expiry date and any term extension filings.
Generic entry blockedFull party and counsel information
| Role | Name | Type | Detail |
|---|---|---|---|
| Plaintiff | Allergan | Individual | Ophthalmic pharmaceuticals company — holder of US7851504B2 covering LUMIGAN® 0.01%Search in Eureka ↗ |
| Defendant | Mankind Pharma, Ltd. | Company | Indian generics manufacturer seeking US market entry via ANDA 218196 for bimatoprost 0.01%Search in Eureka ↗ |
| Plaintiff counsel | Alex M. Grabowski | Attorney | Counsel for AllerganSearch in Eureka ↗ |
| Plaintiff counsel | Angela Whitesell | Attorney | Counsel for AllerganSearch in Eureka ↗ |
| Plaintiff counsel | Brian A. Biggs | Attorney | Counsel for AllerganSearch in Eureka ↗ |
| Plaintiff counsel | Brianne Bharkhda | Attorney | Counsel for AllerganSearch in Eureka ↗ |
| Plaintiff counsel | Catherine Huang | Attorney | Counsel for AllerganSearch in Eureka ↗ |
| Plaintiff counsel | Christopher N. Sipes | Attorney | Counsel for AllerganSearch in Eureka ↗ |
| Plaintiff counsel | David P. Frazier | Attorney | Counsel for AllerganSearch in Eureka ↗ |
| Plaintiff counsel | Douglas A. Behrens | Attorney | Counsel for AllerganSearch in Eureka ↗ |
| Plaintiff counsel | Ellen A. Scordino | Attorney | Counsel for AllerganSearch in Eureka ↗ |
| Plaintiff counsel | Erica N. Andersen | Attorney | Counsel for AllerganSearch in Eureka ↗ |
| Plaintiff counsel | Ferlillia V. Roberson | Attorney | Counsel for AllerganSearch in Eureka ↗ |
| Plaintiff counsel | Henry R. Fildes | Attorney | Counsel for AllerganSearch in Eureka ↗ |
| Plaintiff counsel | Jack B. Blumenfeld | Attorney | Counsel for AllerganSearch in Eureka ↗ |
| Plaintiff counsel | Jeremy A. Tigan | Attorney | Counsel for AllerganSearch in Eureka ↗ |
| Plaintiff counsel | Jia Hui Jiang | Attorney | Counsel for AllerganSearch in Eureka ↗ |
| Plaintiff counsel | Michael A. Morin | Attorney | Counsel for AllerganSearch in Eureka ↗ |
| Plaintiff counsel | Michael A. Sitzman | Attorney | Counsel for AllerganSearch in Eureka ↗ |
| Plaintiff counsel | Michael N. Kennedy | Attorney | Counsel for AllerganSearch in Eureka ↗ |
| Plaintiff counsel | Rebecca L. Rabenstein | Attorney | Counsel for AllerganSearch in Eureka ↗ |
| Plaintiff counsel | Stephanie M. Piper | Attorney | Counsel for AllerganSearch in Eureka ↗ |
| Plaintiff counsel | Susan Krumplitsch | Attorney | Counsel for AllerganSearch in Eureka ↗ |
| Plaintiff counsel | Yi Sun | Attorney | Counsel for AllerganSearch in Eureka ↗ |
| Plaintiff law firm | DLA Piper LLP | Law Firm | Representing AllerganSearch in Eureka ↗ |
| Plaintiff law firm | DLA Piper LLP (US) | Law Firm | Representing AllerganSearch in Eureka ↗ |
| Plaintiff law firm | Morris, Nichols, Arsht & Tunnell LLP | Law Firm | Representing AllerganSearch in Eureka ↗ |
| Defendant counsel | Alan H. Pollack | Attorney | Counsel for Mankind Pharma, Ltd.Search in Eureka ↗ |
| Defendant counsel | Andrew J. Miller | Attorney | Counsel for Mankind Pharma, Ltd.Search in Eureka ↗ |
| Defendant counsel | Daniel Taylor | Attorney | Counsel for Mankind Pharma, Ltd.Search in Eureka ↗ |
| Defendant counsel | Jason A. Lief | Attorney | Counsel for Mankind Pharma, Ltd.Search in Eureka ↗ |
| Defendant counsel | Joanna G. Goldstein | Attorney | Counsel for Mankind Pharma, Ltd.Search in Eureka ↗ |
| Defendant counsel | Kiersten A. Fowler | Attorney | Counsel for Mankind Pharma, Ltd.Search in Eureka ↗ |
| Defendant counsel | Neal C. Belgam | Attorney | Counsel for Mankind Pharma, Ltd.Search in Eureka ↗ |
| Defendant law firm | Smith, Katzenstein & Jenkins LLP | Law Firm | Representing Mankind Pharma, Ltd.Search in Eureka ↗ |
| Presiding judge | Judge John F. Murphy | Judge | Delaware District CourtSearch in Eureka ↗ |
Official order — verbatim text
The Stipulation and Order is unusually explicit for a consent resolution: Mankind’s admission of validity, enforceability, and infringement is on the public record, not merely implied by settlement. The court’s decree under 35 U.S.C. § 271(e)(2)(A) confirms the Hatch-Waxman technical infringement trigger, while the permanent injunction language — covering manufacture, use, offer to sell, sale, and importation — mirrors the full scope of § 271(a) relief. The without-prejudice dismissal of remaining claims limits res judicata to the specific product and ANDA at issue.
US7851504B2 — Bimatoprost Ophthalmic Solution 0.01% (LUMIGAN®)
US7851504B2 protects a formulation of bimatoprost ophthalmic solution at a 0.01% concentration — the active ingredient in Allergan’s LUMIGAN® product used to reduce elevated intraocular pressure in patients with glaucoma or ocular hypertension. The patent covers the specific composition enabling once-daily dosing at this concentration, distinguishing it from earlier 0.03% formulations. It is listed in the FDA Orange Book against LUMIGAN® 0.01% and has been the subject of multiple ANDA-triggered Hatch-Waxman litigations.
Bimatoprost 0.01% represents a commercially significant ophthalmic franchise for Allergan and AbbVie. The ability to maintain patent exclusivity at this concentration — rather than solely at the legacy 0.03% dose — is strategically valuable because the lower-concentration formulation offers a differentiated tolerability profile that has driven prescriber and patient adoption. Any generic manufacturer targeting this specific concentration must contend with US7851504 as the primary Orange Book barrier, making FTO clearance for bimatoprost 0.01% products non-negotiable for market entry planning.
Should you run an FTO against US7851504B2 for bimatoprost 0.01% products?
Any company developing, manufacturing, or seeking to commercialise a generic or branded bimatoprost ophthalmic solution at 0.01% concentration in the United States should treat US7851504B2 as a mandatory FTO target. The Mankind consent order confirms that at least one claim reads on a 0.01% bimatoprost ANDA product. Companies already holding ANDAs, or in pre-ANDA development, should assess both independent and dependent claims to identify whether any formulation design-around is available before submission.
PatSnap Eureka’s FTO Search Agent can rapidly map the claim scope of US7851504B2 against your proposed formulation parameters, identify prosecution history file wrapper estoppels, and surface any continuation or divisional patents in the same family that may extend the effective exclusivity period. Eureka also monitors the Orange Book listing and USPTO Patent Term Extension filings in real time — giving your regulatory and IP teams the accurate expiry dates needed for launch-readiness planning.
Run a freedom-to-operate analysis on US7851504B2 to assess your product’s exposure
Run FTO in Eureka →Similar Hatch-Waxman Bimatoprost & Ophthalmic ANDA Cases
Cases below involve Hatch-Waxman ANDA patent disputes over ophthalmic formulations litigated in Delaware District Court, directly comparable to this bimatoprost action.
What this case signals for the ophthalmic pharma IP landscape
This consent order illustrates how Hatch-Waxman patent disputes over established ophthalmic brands can resolve swiftly when challenger defences are commercially unviable.
Infringement admissions in consent orders raise the bar for parallel ANDA challengers
Mankind’s public admission that US7851504 is valid and infringed by bimatoprost 0.01% generics creates a persuasive record. Other ANDA filers targeting LUMIGAN® 0.01% will need to articulate why their own invalidity or design-around arguments are stronger — or face comparable settlement pressure. Brand holders typically cite consent judgements in parallel litigations during claim construction and settlement negotiations.
Paragraph IV certification retention means Mankind preserves a strategic option
The order permits Mankind to retain its Paragraph IV certification for ANDA 218196. While this does not allow commercial sale during the patent term, it preserves Mankind’s position to launch immediately upon patent expiry without re-filing. Companies tracking competitive generic entry timelines for bimatoprost 0.01% should factor this into launch-readiness planning — Mankind is positioned to move quickly once the ‘504 patent lapses.
Allergan v Mankind — key questions answered
Mankind Pharma admitted that US7851504B2 is valid, enforceable, and that one or more claims would be infringed by the commercial manufacture, use, or sale of its generic bimatoprost ophthalmic solution 0.01% product described in ANDA 218196. This admission was incorporated into a court-entered Stipulation and Order dated 29 October 2024.
The Delaware District Court entered a permanent injunction prohibiting Mankind Pharma, its officers, agents, and those acting in concert with it from manufacturing, using, offering to sell, selling, or importing the generic bimatoprost 0.01% product covered by ANDA 218196 in the United States for the full life of US7851504B2, including any patent term extensions and paediatric exclusivities. Both parties waived appeal rights.
Yes. The Stipulation and Order expressly permits Mankind to maintain its Paragraph IV certification in ANDA 218196 for purposes of receiving or maintaining final FDA approval. However, commercial manufacture, use, sale, or importation in the United States is enjoined for the life of US7851504B2. Mankind is positioned to launch upon patent expiry without re-filing.
The remaining claims, counterclaims, and defences beyond the infringement admission were dismissed without prejudice. This means they were not adjudicated on the merits and can theoretically be re-litigated in a future action. Critically, the order specifies that it does not prejudice claims regarding the ‘504 patent and a product other than the bimatoprost 0.01% product described by ANDA 218196.
Allergan and AbbVie were represented by DLA Piper LLP and Morris, Nichols, Arsht & Tunnell LLP, with a team of over twenty named attorneys. Mankind Pharma was represented by Smith, Katzenstein & Jenkins LLP. The size disparity in counsel teams is consistent with typical brand-versus-generics Hatch-Waxman litigation dynamics in Delaware.
PatSnap Eureka searches patents and litigation data to answer instantly.