Digital Doors v. Cadence Bank: Four-Patent Cybersecurity Suit Dismissed With Prejudice
Digital Doors, Inc. filed a patent infringement action against Cadence Bank, N.A. in the Eastern District of Texas, asserting four patents covering secure digital information infrastructure and granular data storage. After 392 days of litigation, the parties jointly stipulated to dismissal with prejudice under Rule 41(a)(1)(A)(ii), with each side bearing its own costs.
Cybersecurity Patent Assertion Ends in Bilateral Dismissal After 13 Months
Digital Doors, Inc. filed suit against Cadence Bank, N.A. on May 2, 2024 in the Eastern District of Texas (Case No. 2:24-cv-00311), asserting infringement of four U.S. patents: US10250639B2, US10182073B2, US9734169B2, and US9015301B2. The patents relate to secure digital information infrastructure, granular data stores, and information management tools incorporating extraction, secure storage, and content classification — technologies with direct relevance to how financial institutions manage and protect customer data.
The case was resolved by a Joint Stipulation of Dismissal filed pursuant to Rule 41(a)(1)(A)(ii), which the Court accepted on May 29, 2025. All claims and causes of action were dismissed with prejudice, meaning Digital Doors is permanently barred from reasserting these same claims against Cadence Bank. Notably, the court ordered each party to bear its own costs, expenses, and attorneys’ fees — a symmetrical cost allocation consistent with a negotiated resolution rather than a contested merits ruling.
The 392-day duration suggests the matter progressed meaningfully before settlement — long enough for claim construction exchanges or early dispositive motions to have shaped the parties’ negotiating positions. The public record does not disclose any financial terms, licensing arrangement, or product modifications. The ‘with prejudice’ designation, while foreclosing re-litigation, is standard in commercial patent settlements and does not itself indicate which party held the stronger position at resolution.
Filing to Dismissed with Prejudice in 392 days
392 days — above the median time-to-resolution for E.D. Texas patent cases settled by stipulation
Dismissed with prejudice: what the joint stipulation means for both parties
Rule 41(a)(1)(A)(ii) — bilateral stipulation, no merits ruling
A joint stipulation under Rule 41(a)(1)(A)(ii) allows both parties to dismiss the action without a court ruling on the merits. Once filed with signatures from all appearing parties, dismissal is effectively automatic — the court’s role is to accept and acknowledge, not adjudicate. No finding of infringement, validity, or invalidity was made. The ‘with prejudice’ designation was expressly requested by the parties, not imposed by the court.
No merits adjudicationDigital Doors permanently forecloses Cadence Bank as a future defendant
Dismissal with prejudice operates as a final judgment on the merits for res judicata purposes against Cadence Bank specifically. Digital Doors cannot refile these four patent claims against Cadence Bank in any court. However, the patents themselves remain valid and enforceable — Digital Doors retains the right to assert them against other defendants. This outcome is consistent with a confidential settlement in which the plaintiff received consideration in exchange for a permanent release.
Patents remain enforceable vs. third partiesCadence Bank secures permanent protection from these four patents
Cadence Bank achieved finality: the with-prejudice dismissal bars any future suit by Digital Doors on these same patents for the same accused conduct. The absence of a fee award under 35 U.S.C. § 285 (no finding of exceptional case) means neither party escalated to that threshold. Cadence likely absorbed its own legal costs — potentially significant over 13 months — without receiving reimbursement, suggesting a commercially negotiated exit rather than a clear defensive win.
Permanent bar on re-litigationFinancial sector data security patents remain live enforcement risk
This case signals that Digital Doors is actively enforcing its secure data infrastructure patent portfolio against financial institutions — a sector that increasingly relies on the precise technologies these patents describe: content classification, granular data stores, and secure information extraction. Other banks and fintech platforms operating similar data management infrastructure should treat the remaining Digital Doors portfolio as a credible assertion risk. No invalidity finding emerged to limit the patents’ scope.
Active portfolio — other banks at riskFull party and counsel information
| Role | Name | Type | Detail |
|---|---|---|---|
| Plaintiff | Digital Doors, Inc. | Company | Cybersecurity patent assertion entity — holder of US10250639B2 and related data security patentsSearch in Eureka ↗ |
| Defendant | Cadence Bank, N.A. | Company | Cadence Bank, N.A. — U.S. regional commercial bank and financial services providerSearch in Eureka ↗ |
| Plaintiff counsel | Michael Scott Fuller | Attorney | Counsel for Digital Doors, Inc.Search in Eureka ↗ |
| Plaintiff law firm | Garteiser Honea PLLC | Law Firm | Representing Digital Doors, Inc.Search in Eureka ↗ |
| Defendant counsel | Kelly Elizabeth Ransom | Attorney | Counsel for Cadence Bank, N.A.Search in Eureka ↗ |
| Defendant law firm | Kelly Hart & Hallman LLP (La) | Law Firm | Representing Cadence Bank, N.A.Search in Eureka ↗ |
| Presiding judge | Judge N/A | Judge | Texas Eastern District CourtSearch in Eureka ↗ |
Official order — verbatim text
The Court’s order accepts the parties’ joint stipulation verbatim, making no independent findings on infringement, validity, or claim scope. The explicit ‘with prejudice’ language — requested by the parties, not imposed — creates res judicata finality as to Cadence Bank only. The symmetric cost allocation (‘each party to bear its own costs’) and the denial of all pending relief as moot together confirm that no substantive ruling was reached. The phrasing ‘member case’ in the order suggests this action was part of a multi-defendant docket, indicating Digital Doors may have filed parallel suits against other financial institutions on the same patent portfolio.
US10250639B2 — Secure Digital Information Infrastructure and Granular Data Storage
The four asserted patents — US10250639B2, US10182073B2, US9734169B2, and US9015301B2 — form a layered portfolio covering secure digital information infrastructure, including methods for security-designating data, managing granular data stores, extracting and classifying content, and implementing secure storage architectures. The application numbers span from US11/746440 (an earlier priority filing) through US14/597345, suggesting a continuation or family strategy designed to extend claim coverage as the technology matured. These patents sit at the intersection of data governance, cybersecurity, and enterprise information management.
For the financial services sector, the commercial relevance is acute: banks operate precisely the kinds of infrastructure these patents describe — systems that classify customer data, enforce access controls, extract structured information from unstructured sources, and store sensitive records in segmented, security-tiered repositories. The portfolio’s multi-layered filing strategy suggests deliberate coverage of both method and system claims, increasing the difficulty of designing around any single patent. The absence of any IPR or PTAB challenge in the public record means the patents’ validity has not been tested in post-grant proceedings.
Should your team run an FTO against US10250639B2 and the Digital Doors portfolio?
Any financial institution, fintech platform, or enterprise software vendor deploying secure data infrastructure — including content classification engines, granular access-controlled data stores, or automated data extraction and secure storage pipelines — should treat this portfolio as a live FTO risk. The Eastern District of Texas filing, the multi-patent assertion strategy, and the ‘member case’ language in the dismissal order all suggest an active, multi-defendant enforcement campaign is underway or was recently concluded.
PatSnap Eureka’s FTO Search Agent enables R&D and IP teams to map claim language from US10250639B2, US10182073B2, US9734169B2, and US9015301B2 against your specific product architecture — identifying which claim elements, if any, read on your data management or security infrastructure. Eureka can also surface continuation applications and related family members that Digital Doors may assert in future rounds, enabling proactive risk mitigation before a demand letter arrives.
Run a freedom-to-operate analysis on US10250639B2 to assess your product’s exposure
Run FTO in Eureka →Similar Secure Data Infrastructure Patent Cases in E.D. Texas
Explore comparable patent infringement actions asserting cybersecurity and data management patents against financial institutions in the Eastern District of Texas.
What this case signals for the financial data security IP landscape
A 392-day bilateral dismissal in E.D. Texas suggests a resolved licensing dynamic — but Digital Doors’ portfolio remains live against the broader financial sector.
E.D. Texas remains a high-risk venue for financial sector defendants
The Eastern District of Texas consistently attracts patent assertion cases targeting large commercial defendants. Banks and financial services firms with data management infrastructure should conduct proactive FTO analysis against portfolios like Digital Doors’ before litigation is filed — not after. Entry into this docket typically triggers immediate cost pressure regardless of ultimate merit.
With-prejudice dismissal at 13 months typically signals a settled licensing event
When a case of this duration ends by joint stipulation with prejudice and symmetric cost allocation, the most commercially rational inference is that a licensing fee or covenant was exchanged. Patent assertion entities rarely agree to with-prejudice dismissal without consideration. Financial institutions facing similar assertions should model their exposure against comparable settlement values early in the litigation lifecycle.
Digital v Cadence — key questions answered
The case was dismissed with prejudice by joint stipulation under Rule 41(a)(1)(A)(ii) on May 29, 2025. No merits ruling was issued. Each party bears its own costs. Digital Doors cannot refile the asserted claims against Cadence Bank, but the four patents remain enforceable against third parties.
Digital Doors asserted four U.S. patents: US10250639B2, US10182073B2, US9734169B2, and US9015301B2. These patents cover secure digital information infrastructure, granular data stores, security-designated data management, and information infrastructure tools including content extraction, classification, and secure storage methods.
Dismissal with prejudice bars Digital Doors from reasserting these specific claims against Cadence Bank in any future proceeding — it operates as a final judgment on the merits for res judicata purposes as to that defendant. However, the underlying patents (US10250639B2 et al.) remain valid and in force, and Digital Doors retains full rights to assert them against other parties.
No. A joint stipulation of dismissal with prejudice reflects a negotiated resolution between the parties — it contains no judicial finding on validity, invalidity, infringement, or non-infringement. The patents’ legal status is unchanged. No IPR or PTAB invalidity proceeding appears in the public record of this case.
The court order’s reference to the ‘above-captioned member case’ suggests this was one action within a coordinated multi-defendant docket — consistent with a broader enforcement campaign. The public record does not confirm the identities of other defendants, but financial institutions with similar data infrastructure architectures should treat the Digital Doors portfolio as an active assertion risk.
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