Cedar Lane Technologies v. First Manhattan Securities: Dismissed With Prejudice in 47 Days
Cedar Lane Technologies filed suit in the Southern District of New York asserting US8577782B2, a patent covering conditional-offer trading systems for semi-anonymous participants, against broker-dealer First Manhattan Securities LLC. The case resolved in just 47 days via a joint stipulation of dismissal, with plaintiff’s claims dropped with prejudice and defendant’s counterclaims dismissed without prejudice.
A rapid exit: joint stipulation ends fintech patent suit in seven weeks
On November 13, 2025, Cedar Lane Technologies, Inc. filed a patent infringement action in the U.S. District Court for the Southern District of New York against First Manhattan Securities LLC. The suit asserted US8577782B2, which covers trading systems that enable conditional offers among semi-anonymous market participants — a technology domain directly relevant to electronic brokerage and alternative trading system operators.
The case closed on December 30, 2025 — just 47 days after filing — through a joint stipulation of dismissal approved by Judge Margaret M. Garnett. Under the agreed terms, all claims by Cedar Lane against First Manhattan were dismissed with prejudice, permanently barring Cedar Lane from re-asserting the same claims against the same defendant. First Manhattan’s counterclaims, however, were dismissed without prejudice, preserving the defendant’s ability to revive those claims in a future proceeding.
A 47-day resolution is notably rapid for patent litigation in the SDNY, which typically proceeds over multiple years. The asymmetric dismissal terms — with prejudice for plaintiff, without prejudice for defendant — are consistent with a negotiated settlement in which the plaintiff concedes finality on its infringement claims while the defendant retains optionality. The financial terms of any resolution, if any, are not reflected in the public record.
Filing to Case Dismissed in 47 days
47 days — well below the median SDNY patent case duration, suggesting early negotiated resolution
With-prejudice dismissal: what the stipulated order means for both parties
Joint stipulation of dismissal: how Rule 41 ends a case by agreement
A joint stipulation of dismissal under Federal Rule of Civil Procedure 41(a)(1)(A)(ii) allows both parties to exit litigation without a merits ruling. Here, the court granted the stipulation as presented. The split structure — with prejudice for plaintiff’s claims, without prejudice for defendant’s counterclaims — reflects a deliberate, negotiated allocation of legal risk rather than a standard bilateral dismissal.
Rule 41 joint stipulationWith vs. without prejudice: the critical legal difference in this order
Cedar Lane’s infringement claims were dismissed with prejudice, meaning claim preclusion applies — Cedar Lane cannot refile the same patent claims against First Manhattan Securities in any future action. First Manhattan’s counterclaims were dismissed without prejudice, meaning those claims survive in theory and could be refiled. This asymmetry typically indicates the plaintiff accepted finality as a condition of resolution, while the defendant preserved leverage.
Claim preclusion applies to plaintiffCedar Lane forecloses future action against First Manhattan on this patent
By agreeing to a with-prejudice dismissal, Cedar Lane Technologies permanently surrenders any right to assert US8577782B2 against First Manhattan Securities in U.S. federal court. This is a significant concession. Cedar Lane may, however, continue to assert the patent against other defendants in separate proceedings, and the patent itself remains in force unless separately invalidated.
Patent remains enforceable vs. othersFirst Manhattan exits cleanly — counterclaims preserved for future use
First Manhattan Securities LLC secured dismissal of all infringement claims with no merits finding against it. Its own counterclaims — which could include invalidity or unenforceability arguments — remain available without prejudice. Represented by Fish & Richardson, a firm with deep patent litigation experience, the defendant appears to have negotiated a favourable exit while retaining optionality on its defences.
Defendant retains counterclaim rightsFull party and counsel information
| Role | Name | Type | Detail |
|---|---|---|---|
| Plaintiff | Cedar Lane Technologies, Inc. | Company | Financial technology patent assertion entity — holder of US8577782B2Search in Eureka ↗ |
| Defendant | First Manhattan Securities LLC | Company | First Manhattan Securities LLC — registered broker-dealer and securities firmSearch in Eureka ↗ |
| Plaintiff counsel | Isaac Rabicoff | Attorney | Counsel for Cedar Lane Technologies, Inc.Search in Eureka ↗ |
| Plaintiff law firm | Rabicoff Law LLC | Law Firm | Representing Cedar Lane Technologies, Inc.Search in Eureka ↗ |
| Defendant counsel | Excylyn Janaize Hardin-Smith | Attorney | Counsel for First Manhattan Securities LLCSearch in Eureka ↗ |
| Defendant counsel | Neil J. McNabnay | Attorney | Counsel for First Manhattan Securities LLCSearch in Eureka ↗ |
| Defendant law firm | Fish & Richardson LLP | Law Firm | Representing First Manhattan Securities LLCSearch in Eureka ↗ |
| Defendant law firm | Fish & Richardson PC (Dallas) | Law Firm | Representing First Manhattan Securities LLCSearch in Eureka ↗ |
| Presiding judge | Judge Margaret M. Garnett | Judge | New York Southern District CourtSearch in Eureka ↗ |
Official order — verbatim text
The court’s order granted a joint stipulation in which the plaintiff’s infringement claims were dismissed with prejudice and the defendant’s counterclaims without prejudice. This asymmetric structure carries significant legal consequence: the with-prejudice dismissal of Cedar Lane’s claims operates as a final adjudication on the merits for res judicata purposes as between these two parties, while First Manhattan retains the procedural ability to revive its counterclaims — most likely invalidity or unenforceability arguments — if circumstances warrant.
US8577782B2 — Conditional-Offer Trading for Semi-Anonymous Participants
US8577782B2, filed under application number US12/756929, covers methods and systems for electronic trading in which participants can submit conditional offers while maintaining a degree of anonymity. The patent sits at the intersection of financial technology and market microstructure, addressing how trading venues can facilitate price discovery and order matching without fully exposing participant identity — a design relevant to dark pools, alternative trading systems, and certain broker-dealer platforms.
For the fintech and electronic trading sector, this patent represents a potential enforcement risk for any platform operator that supports conditional order types or semi-anonymous trading functionality. As electronic trading infrastructure has proliferated across retail brokerages, institutional platforms, and ATS operators, the claim scope of US8577782B2 could plausibly be read against a range of modern trading systems. Cedar Lane’s decision to assert this patent against a securities firm suggests an active monetisation strategy that other market participants should monitor.
Should your trading platform run an FTO against US8577782B2?
Any firm operating an electronic trading platform that supports conditional orders, partially anonymous order books, or negotiated trade workflows should consider a freedom-to-operate analysis against US8577782B2. This includes broker-dealers, ATS operators, dark pool administrators, and fintech firms building order management or execution systems. The Cedar Lane v. First Manhattan case demonstrates that this patent is being actively asserted in U.S. federal court against financial services firms.
PatSnap Eureka’s FTO Search Agent can map the claim scope of US8577782B2 against your product architecture, identify prior art that could support an invalidity position, and flag related Cedar Lane patents or continuation applications that may present adjacent risk. With the patent surviving this case and Cedar Lane retaining enforcement rights against other defendants, proactive FTO work is the most cost-effective risk mitigation available to trading technology teams.
Run a freedom-to-operate analysis on US8577782B2 to assess your product’s exposure
Run FTO in Eureka →Similar fintech trading-system patent cases in SDNY and federal courts
Explore related patent infringement actions involving electronic trading, conditional-order systems, and financial technology patents litigated in the Southern District of New York and comparable federal venues.
What this case signals for the fintech trading-system IP landscape
A 47-day exit in the SDNY suggests enforcement pressure on trading-system patents can resolve quickly — but the terms matter.
Rapid dismissal does not mean a weak patent — monitor US8577782B2 for new targets
The with-prejudice dismissal resolves only this defendant. Cedar Lane retains the right to assert US8577782B2 against other electronic trading platforms, broker-dealers, or ATS operators. Firms operating conditional-offer or semi-anonymous trading functionality should evaluate their exposure to this patent independently of this case’s outcome.
Fish & Richardson’s involvement signals defendant took the threat seriously
Engaging Fish & Richardson — one of the top-tier patent litigation firms — for a case that closed in 47 days suggests First Manhattan assessed real litigation risk early and moved decisively. The counterclaim-without-prejudice preservation is consistent with an invalidation strategy held in reserve, which may inform how other defendants approach Cedar Lane assertions.
Cedar v First — key questions answered
The case was dismissed via joint stipulation on December 30, 2025, just 47 days after filing. Cedar Lane’s infringement claims were dismissed with prejudice — permanently barring refiling against First Manhattan — while First Manhattan’s counterclaims were dismissed without prejudice, preserving the defendant’s ability to revive them.
A with-prejudice dismissal operates as a final judgment on the merits for res judicata purposes. Cedar Lane Technologies cannot reassert the same claims under US8577782B2 against First Manhattan Securities in any future federal court proceeding. Cedar Lane retains the right to assert the patent against other defendants.
The sole patent asserted is US8577782B2, filed under application number US12/756929. It covers trading systems and methods involving conditional offers for semi-anonymous market participants — technology relevant to electronic brokerage platforms, alternative trading systems, and dark pool operators.
The asymmetric dismissal structure reflects a negotiated outcome. Defendants in patent cases frequently retain counterclaims — typically invalidity or unenforceability — as leverage. Preserving them without prejudice allows First Manhattan to revive those claims if needed, while the plaintiff accepted finality on its infringement assertions, a structure consistent with a confidential settlement or licence agreement.
No. A dismissal with prejudice between two specific parties does not affect the patent’s validity or enforceability as against third parties. US8577782B2 remains in force, and Cedar Lane Technologies retains full rights to assert it in separate proceedings against other electronic trading platforms or broker-dealers.
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