Linfo IP v. Alibaba Group: Infringement Suit Dismissed Without Prejudice
Texas-based patent assertion entity Linfo IP, LLC filed suit against Alibaba Group in the Northern District of California, asserting US9092428B1 covering information discovery and extraction from text content. The case closed after 177 days when Linfo IP voluntarily dismissed all claims without prejudice before Alibaba filed any answer, leaving the door open for future enforcement.
Pre-Answer Dismissal Leaves Alibaba Patent Dispute Unresolved
On 22 May 2024, Linfo IP, LLC — a Texas-based limited liability company with its principal place of business in Austin — filed a patent infringement action against Alibaba Group, Inc. in the United States District Court for the Northern District of California before Judge Haywood S. Gilliam, Jr. The suit centred on US9092428B1, a patent covering a system with methods and user interface for discovering, extracting, and presenting information from text content. Linfo IP alleged that Alibaba’s products and services infringe the patent by performing infringing methods introduced into the California stream of commerce.
The case closed on 15 November 2024 — 177 days after filing — when Linfo IP filed a notice of voluntary dismissal pursuant to Federal Rule of Civil Procedure 41(a)(1)(A)(i). Critically, dismissal was expressly stated to be WITHOUT PREJUDICE as to the asserted patent. Because Alibaba had not yet filed an answer or a motion for summary judgment at the time of dismissal, Linfo IP was entitled to dismiss as of right without court approval. Each party was ordered to bear its own costs, expenses, and attorneys’ fees.
A dismissal achieved within 177 days — well before any substantive court ruling — is consistent with several strategic scenarios: settlement discussions that did not require a formal agreement, a reassessment of the infringement position, or a decision to refile in a different venue or against a different entity. The public record is silent on whether any consideration changed hands. The without-prejudice designation means Linfo IP retains the right to assert US9092428B1 against Alibaba again, subject to applicable statutes of limitations, making this an open enforcement posture rather than a clean resolution.
Filing to Voluntary dismissal in 177 days
177 days — notably short; median N.D. Cal. patent cases run 2–3 years to trial
Voluntarily dismissed: what the Rule 41 filing means for both parties
Rule 41(a)(1)(A)(i) — dismissal as of right, no court approval needed
Federal Rule of Civil Procedure 41(a)(1)(A)(i) permits a plaintiff to dismiss an action without a court order by filing a notice before the defendant serves an answer or a motion for summary judgment. Alibaba had done neither, so Linfo IP’s dismissal was self-executing and immediate. The without-prejudice designation is the default under this rule unless the notice states otherwise.
Pre-answer voluntary dismissalExpressly without prejudice — refiling remains available
The dismissal notice explicitly states the dismissal is WITHOUT PREJUDICE as to the asserted patent. This is significant: Linfo IP is not barred from reasserting US9092428B1 against Alibaba in a future action. Had the notice been silent, the Rule 41 default would also be without prejudice, but the explicit statement removes any ambiguity. Parties considering their exposure to this patent should treat enforcement risk as ongoing.
Refiling risk remainsLinfo IP preserves all enforcement options on US9092428B1
By dismissing without prejudice, Linfo IP exits this action without conceding infringement, validity, or any merits issue. The patent remains in force. Linfo IP can refile against Alibaba, file in a different court, or pursue other defendants in the same technology space. The own-costs arrangement means no financial penalty for the early exit. This outcome is consistent with a tactical repositioning rather than a permanent surrender.
Patent enforceability intactAlibaba escapes this action but faces residual exposure
Alibaba obtains no merits ruling and no invalidity finding — it cannot invoke claim or issue preclusion against a future Linfo IP lawsuit on this patent. Because no answer was filed, Alibaba’s defences and any invalidity counterclaims were never tested. Companies in the text-analytics and information-extraction space offering similar services should note that the without-prejudice dismissal leaves this patent as an active enforcement instrument.
No preclusion, exposure persistsFull party and counsel information
| Role | Name | Type | Detail |
|---|---|---|---|
| Plaintiff | Linfo IP, LLC | Company | Patent assertion entity — holder of US9092428B1, text-content information discoverySearch in Eureka ↗ |
| Defendant | Alibaba Group, Inc. | Company | Alibaba Group, Inc. — Delaware-incorporated global e-commerce and cloud technology companySearch in Eureka ↗ |
| Plaintiff counsel | Susan S.Q. Kalra | Attorney | Counsel for Linfo IP, LLCSearch in Eureka ↗ |
| Plaintiff counsel | William Peterson Ramey , III | Attorney | Counsel for Linfo IP, LLCSearch in Eureka ↗ |
| Plaintiff law firm | Ramey LLP | Law Firm | Representing Linfo IP, LLCSearch in Eureka ↗ |
| Defendant counsel | Bo Bryan Jin | Attorney | Counsel for Alibaba Group, Inc.Search in Eureka ↗ |
| Defendant law firm | Simpson Thacher And Bartlett, LLP | Law Firm | Representing Alibaba Group, Inc.Search in Eureka ↗ |
| Presiding judge | Judge Haywood S. Gilliam, Jr | Judge | California Northern District CourtSearch in Eureka ↗ |
Official order — verbatim text
The dismissal notice is procedural rather than substantive — the court made no ruling on infringement, validity, or claim construction. The explicit without-prejudice language and the mutual own-costs provision are the only legally operative terms. No merits adjudication occurred, meaning neither party can invoke this proceeding as precedent on the patent’s scope or enforceability. The absence of an answer or counterclaim also means Alibaba’s potential invalidity arguments against US9092428B1 were never placed on the record.
US9092428B1 — Text-Content Information Discovery and Extraction System
US9092428B1 (application number US13/709827) covers a system with methods and a user interface for discovering information embedded in text content, extracting that information, and presenting it to users. The patent sits at the intersection of natural language processing, information retrieval, and user interface design — a technically broad space that underpins search engines, content recommendation engines, and AI-driven text analytics platforms. The application date context suggests the invention was developed during the early maturation of large-scale text-mining and semantic search technologies.
From a competitive intelligence perspective, the claimed technology is foundational to a wide range of modern software products: cloud-based search APIs, e-commerce product discovery systems, customer-support automation tools, and enterprise knowledge management platforms all depend on variants of text-content information extraction. A patent with claims at this level of generality — if broadly construed — could reach across multiple product categories simultaneously. This makes US9092428B1 a credible assertion instrument for a PAE targeting technology-intensive defendants in the Northern District of California, where many major cloud and platform companies are headquartered or maintain principal operations.
Should your product team run an FTO on US9092428B1?
Any engineering team building features that parse, extract, or surface structured information from unstructured text should treat US9092428B1 as a patent requiring active FTO attention. This includes: search and discovery interfaces, NLP-powered content tagging, information extraction pipelines, recommendation engines driven by text analysis, and conversational AI features that identify entities or facts within text. The patent’s continued enforceability — confirmed by this without-prejudice dismissal — means FTO clearance obtained before this filing may need to be refreshed in light of the ongoing assertion posture.
PatSnap Eureka’s FTO Search Agent can map the independent and dependent claims of US9092428B1 against your product’s technical architecture and surface prior art that could support an invalidity challenge or design-around strategy. Eureka also tracks Linfo IP and Ramey LLP filing activity in real time, so your in-house team receives automated alerts if new assertions are filed against similar technology defendants — giving you early-stage visibility before a complaint lands on your desk.
Run a freedom-to-operate analysis on US9092428B1 to assess your product’s exposure
Run FTO in Eureka →Similar Patent Cases: Text-Content Information Extraction in N.D. Cal.
Related infringement actions asserting information-extraction and NLP patents in the Northern District of California, including cases involving PAE plaintiffs and major technology defendants.
What this case signals for the text-analytics IP enforcement landscape
A pre-answer dismissal without prejudice in N.D. Cal. rarely signals the end of a patent assertion campaign — it often precedes a strategic reset.
Pre-answer dismissals are a known PAE tactical tool — watch for refiling
Patent assertion entities frequently use voluntary Rule 41 dismissals to reset: changing defendants, venue, or claim framing before refiling. The without-prejudice designation on US9092428B1 means any company offering text-content information discovery or extraction features should treat this patent as actively managed and monitor for new filings by Linfo IP.
Own-costs order caps immediate financial exposure but signals no settlement
The mutual own-costs arrangement is consistent with either a quiet settlement or a straightforward strategic withdrawal. The public record does not confirm any licence or payment. Companies in negotiations with Linfo IP entities should note that no financial benchmark from this case is publicly available to anchor licensing discussions.
Linfo v Alibaba — key questions answered
The case was dismissed WITHOUT PREJUDICE. Linfo IP’s voluntary dismissal notice filed under Rule 41(a)(1)(A)(i) expressly states the dismissal of all claims is without prejudice as to the asserted patent, US9092428B1. Linfo IP retains the right to refile the same claims against Alibaba in a future action.
US9092428B1 (application US13/709827) covers a system with methods and a user interface for discovering information in text content and extracting and presenting that information. The patent sits in the natural language processing and information retrieval space, potentially reaching search, content discovery, text analytics, and AI-driven information extraction products.
Federal Rule of Civil Procedure 41(a)(1)(A)(i) permits a plaintiff to dismiss an action as of right — without court approval — by filing a notice of dismissal before the defendant serves an answer or a motion for summary judgment. The dismissal notice states Alibaba had done neither at the time of filing, making the dismissal self-executing.
The dismissal notice specifies that each party shall bear its own costs, expenses, and attorneys’ fees. This means Linfo IP cannot seek to recover litigation costs from Alibaba, and vice versa. It does not indicate any monetary settlement, licence grant, or payment between the parties — the public record is silent on whether any consideration was exchanged.
Yes. Because the dismissal is expressly without prejudice, Linfo IP may refile claims against Alibaba asserting US9092428B1, subject to the applicable six-year patent damages statute of limitations under 35 U.S.C. § 286. No merits ruling was made, so no res judicata or issue preclusion bar applies to a future action on the same patent.
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