airSlate v. Inkit: Document Generation Patent Suit Dismissed Without Prejudice
airSlate, Inc. filed suit against Inkit, Inc. in Delaware District Court asserting US11449815B2 against Inkit’s Secure Document Generation platform. After 475 days of litigation, both parties stipulated to dismissal without prejudice under Fed. R. Civ. P. 41(a)(1)(A)(ii), with each side bearing its own costs and fees.
Stipulated exit leaves US11449815B2 enforceability unresolved
On 16 November 2023, airSlate, Inc. filed a patent infringement action against Inkit, Inc. in the District of Delaware (Case No. 1:23-cv-01307), asserting US11449815B2 — a patent covering secure document generation technology — against Inkit’s Secure Document Generation platform. airSlate was represented by DLA Piper LLP, while Inkit retained Morris, Nichols, Arsht & Tunnell LLP. The dispute centred on whether Inkit’s commercial platform infringed the claims of airSlate’s issued patent in the document workflow automation space.
The case closed on 5 March 2025 via a joint stipulation under Fed. R. Civ. P. 41(a)(1)(A)(ii), resulting in dismissal without prejudice of all claims. Critically, the stipulation includes a mutual waiver of any right to seek attorney’s fees under 35 U.S.C. § 285, and each party agreed to bear its own litigation costs. A dismissal without prejudice means airSlate retains the legal right to refile the same infringement claims against Inkit in the future, subject to applicable statutes of limitations and any intervening legal developments.
The 475-day duration before a without-prejudice dismissal is consistent with a resolution reached after substantive engagement — potentially following claim construction briefing or early discovery — but before any dispositive ruling. The public record does not disclose whether a commercial settlement, licensing arrangement, or business relationship change drove the stipulation. The mutual fee waiver and cost-bearing terms suggest a negotiated, balanced exit rather than a capitulation by either side, though the underlying commercial rationale remains unknown.
Filing to Dismissed without Prejudice in 475 days
475 days from filing to stipulated dismissal — above the median for pre-trial IP resolutions in Delaware
Dismissed without prejudice: what the stipulation means for both parties
Rule 41(a)(1)(A)(ii): the stipulated dismissal route
Fed. R. Civ. P. 41(a)(1)(A)(ii) permits dismissal by written stipulation signed by all parties — no court order required. Because this stipulation specifies ‘without prejudice,’ it carries no res judicata effect: airSlate is not barred from reasserting US11449815B2 against Inkit in a future action. No merits ruling was made; the patent’s validity and Inkit’s alleged infringement remain legally undecided.
No merits adjudicatedWithout prejudice: the refiling door stays open
A dismissal ‘without prejudice’ is legally distinct from one ‘with prejudice.’ Without prejudice means airSlate retains the right to refile identical or substantially similar claims against Inkit, provided statutes of limitations and any intervening IPR or invalidity proceedings permit. With prejudice would have permanently barred refiling. The stipulation here is explicitly without prejudice, preserving airSlate’s enforcement options — an important distinction for both parties’ future commercial posture.
Refiling rights preservedMutual § 285 waiver: neither side recovers fees
The stipulation expressly requires each party to bear its own costs, expenses, and attorney’s fees, and both parties knowingly waive any claim under 35 U.S.C. § 285 — the fee-shifting statute available in exceptional patent cases. This symmetric arrangement suggests neither party had sufficient leverage to extract a fee award, or that a clean exit was commercially preferable to continued litigation. It also removes any appellate hook on fee entitlement.
Symmetric cost allocationUnresolved patent leaves ongoing competitive risk
Because validity and infringement of US11449815B2 were never adjudicated, Inkit cannot point to a court ruling to shield its Secure Document Generation platform from future assertions. Competitors in the document automation SaaS sector should treat this patent as live and enforceable. The without-prejudice structure means airSlate could refile — or license aggressively — if market conditions change. Due diligence on document generation platforms should account for this patent’s unresolved status.
Patent remains enforceableFull party and counsel information
| Role | Name | Type | Detail |
|---|---|---|---|
| Plaintiff | airSlate, Inc. | Company | Document workflow automation software company — holder of US11449815B2Search in Eureka ↗ |
| Defendant | Inkit, Inc. | Company | SaaS provider of secure document generation and automation platformsSearch in Eureka ↗ |
| Plaintiff counsel | Brian A. Biggs | Attorney | Counsel for airSlate, Inc.Search in Eureka ↗ |
| Plaintiff counsel | Christopher J. Deck | Attorney | Counsel for airSlate, Inc.Search in Eureka ↗ |
| Plaintiff counsel | Michael G. Strapp | Attorney | Counsel for airSlate, Inc.Search in Eureka ↗ |
| Plaintiff counsel | Michael Saulnier | Attorney | Counsel for airSlate, Inc.Search in Eureka ↗ |
| Plaintiff counsel | Stephanie E. O’Byrne | Attorney | Counsel for airSlate, Inc.Search in Eureka ↗ |
| Plaintiff law firm | DLA Piper LLP | Law Firm | Representing airSlate, Inc.Search in Eureka ↗ |
| Plaintiff law firm | DLA Piper LLP (US) | Law Firm | Representing airSlate, Inc.Search in Eureka ↗ |
| Defendant counsel | Michael J. Flynn. | Attorney | Counsel for Inkit, Inc.Search in Eureka ↗ |
| Defendant law firm | Morris, Nichols, Arsht & Tunnell LLP | Law Firm | Representing Inkit, Inc.Search in Eureka ↗ |
| Presiding judge | Judge N/A | Judge | Delaware District CourtSearch in Eureka ↗ |
Official order — verbatim text
The stipulation invokes Rule 41(a)(1)(A)(ii) and specifies dismissal of all claims without prejudice, with a bilateral waiver of § 285 fee rights. The without-prejudice designation is legally significant: it preserves airSlate’s ability to refile infringement claims based on US11449815B2 against Inkit, and means no claim or issue preclusion attaches to this dismissal. The explicit § 285 waiver closes off any subsequent fee application by either party, suggesting both sides negotiated a clean procedural exit without admissions of liability or merit.
US11449815B2 — Secure Document Generation and Workflow Automation
US11449815B2, filed under application number US16/678541 (suggesting a late 2019 filing date), covers technology in the secure document generation and workflow automation domain. The patent sits within the post-Alice era of software patent prosecution, meaning its claims were required to demonstrate patent-eligible subject matter beyond abstract ideas under 35 U.S.C. § 101. The fact that the patent issued as US11449815B2 indicates it survived USPTO examination, including any § 101 challenges raised during prosecution.
In the competitive landscape of document automation SaaS, patents covering secure generation workflows carry strategic weight. airSlate’s assertion of this patent against Inkit’s Secure Document Generation platform suggests the claims are broad enough to read on commercially deployed, competing products. For companies building document generation, e-signature, or workflow automation tools, US11449815B2 represents a live enforcement risk — particularly given the without-prejudice dismissal that leaves validity and infringement questions entirely unresolved. Monitoring continuation applications from the same family is advisable.
Should your team run an FTO against US11449815B2?
Any R&D or product team developing secure document generation, workflow automation, or document delivery SaaS features should consider a freedom-to-operate review against US11449815B2. The patent was actively asserted against a commercially deployed platform, and the without-prejudice dismissal means it remains fully enforceable. Teams building PDF generation, document templating, or automated document delivery pipelines are particularly exposed if their architecture overlaps with the patent’s claim scope.
PatSnap Eureka’s FTO Search Agent can map the claim language of US11449815B2 against your product architecture, identify potentially overlapping features, and surface relevant prior art that could inform invalidity arguments if needed. Eureka also tracks continuation applications from the US16/678541 family, ensuring your FTO analysis accounts for any broadening claims that may issue from related applications — a critical step given the active prosecution landscape in document automation software.
Run a freedom-to-operate analysis on US11449815B2 to assess your product’s exposure
Run FTO in Eureka →Similar document automation patent cases in Delaware District Court
Explore patent infringement cases involving document generation, workflow automation, and SaaS platforms litigated in the District of Delaware with comparable dismissal or resolution patterns.
What this case signals for the document automation IP landscape
A without-prejudice exit after 475 days keeps US11449815B2 active as an enforcement tool — and signals consolidation pressure in document generation SaaS.
Without-prejudice dismissals don’t mean the threat has passed
Document automation SaaS companies should not treat this dismissal as clearance. airSlate retains full rights to refile under US11449815B2. Competitors whose platforms overlap with secure document generation workflows face the same potential exposure Inkit faced. An FTO analysis against this patent is advisable before launching or scaling competing products.
The § 285 waiver signals a negotiated, balanced exit
Mutual waiver of fee-shifting rights under 35 U.S.C. § 285 is a marker of a commercially negotiated resolution rather than one party’s concession. This pattern — seen frequently in Delaware patent cases resolved before claim construction — typically suggests the parties reached an off-docket accommodation, though the public record is silent on any underlying terms.
airSlate v Inkit — key questions answered
The dismissal without prejudice under Rule 41(a)(1)(A)(ii) means all claims were dropped without any merits ruling, and airSlate retains the right to refile infringement claims based on US11449815B2 against Inkit. No issue or claim preclusion attaches. The patent’s validity and Inkit’s alleged infringement remain legally undecided.
US11449815B2 is a U.S. patent held by airSlate, Inc., filed under application number US16/678541 (circa late 2019), covering secure document generation and workflow automation technology. It was asserted against Inkit’s Secure Document Generation platform in Case No. 1:23-cv-01307 in the District of Delaware.
The stipulation includes a mutual waiver of § 285 fee rights, meaning neither party can later seek to recover attorney’s fees as the prevailing party in an ‘exceptional case.’ This is a negotiated term that typically signals a balanced exit — neither side had clear leverage to pursue fees, or both preferred finality over continued fee litigation. The underlying commercial rationale is not disclosed in the public record.
Yes. Because the dismissal is explicitly without prejudice, airSlate is legally permitted to refile infringement claims based on US11449815B2 against Inkit, subject to applicable statutes of limitations and any intervening legal developments such as IPR proceedings or changes in the patent’s claim scope. The dismissal does not bar future enforcement.
The case was filed in the U.S. District Court for the District of Delaware (Case No. 1:23-cv-01307) on 16 November 2023 and closed on 5 March 2025, a duration of 475 days. DLA Piper LLP represented airSlate; Morris, Nichols, Arsht & Tunnell LLP represented Inkit. The case ended via stipulated dismissal without a trial or dispositive ruling.
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