Prolitec v. ScentAir Technologies: 7-Patent Scent Diffusion Dispute Dismissed Without Prejudice
Prolitec, Inc. filed suit against ScentAir Technologies, LLC in Delaware federal court asserting seven patents covering automated scent delivery systems against ScentAir’s Breeze product and related software. After nearly five years of litigation, both parties stipulated to dismiss without prejudice on May 14, 2025 — each side bearing its own costs and attorneys’ fees.
A Five-Year Scent Technology Patent War Ends in Stalemate
Prolitec, Inc. filed this patent infringement action against ScentAir Technologies, LLC on July 24, 2020 in the United States District Court for the District of Delaware. Prolitec asserted seven patents — US9745976B2, US9446162B2, US20050249419A1, US9460404B2, US9480767B1, US9162004B1, and US8855827B2 — spanning automated scent diffusion systems, delivery control technology, and related software, against ScentAir’s Breeze product and associated software platform.
The case closed on May 14, 2025 when both parties filed a stipulated dismissal under Federal Rule of Civil Procedure 41(a)(1)(ii), ending the action without prejudice. Each side agreed to bear its own costs and attorneys’ fees. A dismissal without prejudice means no court adjudicated the merits of Prolitec’s infringement claims or ScentAir’s counterclaims — critically, Prolitec retains the right to refile these claims in the future, subject to applicable statutes of limitations.
A litigation spanning 1,755 days that concludes by stipulated dismissal without a merits ruling typically signals either a negotiated commercial resolution reached privately between the parties, a strategic reassessment by the plaintiff, or an impasse that neither party wished to resolve through trial. The public record does not disclose whether any licensing arrangement, business agreement, or other consideration accompanied this dismissal. The equal cost-bearing provision and the absence of prejudice designation are consistent with a confidential settlement or a mutually agreed standdown.
Filing to Dismissed without Prejudice in 1755 days
Nearly 5 years of litigation — well above the median district court patent case duration of ~2.5 years
Dismissed without prejudice: what the stipulation means for both parties
Rule 41(a)(1)(ii) dismissal: what ‘without prejudice’ actually means
Under FRCP 41(a)(1)(ii), parties may jointly stipulate to dismiss an action without a court order. The ‘without prejudice’ designation is legally significant: it means the dismissal does not operate as an adjudication on the merits. Prolitec’s infringement claims are not barred by res judicata, and the seven asserted patents retain their validity — they have simply not been tested in this litigation.
No merits rulingProlitec retains the right to refile — but clock is ticking
Because the dismissal is without prejudice, Prolitec preserves the option to reassert its seven scent diffusion patents against ScentAir or other competitors. However, a second filing on the same patents against the same defendant may face heightened scrutiny, and damages accrual periods may be affected. The equal cost-bearing provision suggests Prolitec did not extract a concession from ScentAir in open court.
Right to refile preservedScentAir avoids merits ruling — but patent threat remains live
ScentAir achieves dismissal of the immediate action without any court finding of infringement, but the seven Prolitec patents remain valid and unlitigated. ScentAir’s Breeze product and software continue to face potential exposure if Prolitec — or a successor-in-interest — elects to refile. Absent a documented license or covenant not to sue, this dismissal without prejudice provides ScentAir no permanent safe harbour.
Exposure not fully extinguishedSector uncertainty: seven scent delivery patents remain untested
For ambient scent technology competitors, this outcome preserves meaningful IP uncertainty. None of Prolitec’s seven patents were invalidated or found not infringed, meaning they remain enforceable as issued. Companies developing or commercialising scent diffusion hardware and control software should treat these patents as live risks and consider freedom-to-operate analysis before entering product segments adjacent to the ScentAir Breeze use case.
Seven patents remain enforceableFull party and counsel information
| Role | Name | Type | Detail |
|---|---|---|---|
| Plaintiff | Prolitec, Inc. | Company | Scent marketing technology company — holder of US9745976B2 and six further scent diffusion patentsSearch in Eureka ↗ |
| Defendant | ScentAir Technologies, LLC | Company | ScentAir Technologies, LLC — commercial ambient scent delivery solutions provider, maker of ScentAir BreezeSearch in Eureka ↗ |
| Plaintiff counsel | Alexandra M. Joyce | Attorney | Counsel for Prolitec, Inc.Search in Eureka ↗ |
| Plaintiff counsel | Brian R. Lemon | Attorney | Counsel for Prolitec, Inc.Search in Eureka ↗ |
| Plaintiff counsel | Cory C. Bell | Attorney | Counsel for Prolitec, Inc.Search in Eureka ↗ |
| Plaintiff counsel | Emily M. Ross | Attorney | Counsel for Prolitec, Inc.Search in Eureka ↗ |
| Plaintiff counsel | J. Derek McCorquindale | Attorney | Counsel for Prolitec, Inc.Search in Eureka ↗ |
| Plaintiff counsel | Jeffrey E. Danley | Attorney | Counsel for Prolitec, Inc.Search in Eureka ↗ |
| Plaintiff counsel | Jency Mathew | Attorney | Counsel for Prolitec, Inc.Search in Eureka ↗ |
| Plaintiff counsel | Jessica S. Gritton | Attorney | Counsel for Prolitec, Inc.Search in Eureka ↗ |
| Plaintiff counsel | Marc C. Levy | Attorney | Counsel for Prolitec, Inc.Search in Eureka ↗ |
| Plaintiff counsel | Michael P. Kelly | Attorney | Counsel for Prolitec, Inc.Search in Eureka ↗ |
| Plaintiff counsel | Syed M. Abedi | Attorney | Counsel for Prolitec, Inc.Search in Eureka ↗ |
| Plaintiff counsel | Tayah Woodard | Attorney | Counsel for Prolitec, Inc.Search in Eureka ↗ |
| Plaintiff law firm | Akerman LLP | Law Firm | Representing Prolitec, Inc.Search in Eureka ↗ |
| Plaintiff law firm | McCarter & English, LLP | Law Firm | Representing Prolitec, Inc.Search in Eureka ↗ |
| Defendant counsel | Brian A. Biggs | Attorney | Counsel for ScentAir Technologies, LLCSearch in Eureka ↗ |
| Defendant counsel | Devon C. Beane | Attorney | Counsel for ScentAir Technologies, LLCSearch in Eureka ↗ |
| Defendant counsel | Jared R. Lund | Attorney | Counsel for ScentAir Technologies, LLCSearch in Eureka ↗ |
| Defendant counsel | Jeff Castellano | Attorney | Counsel for ScentAir Technologies, LLCSearch in Eureka ↗ |
| Defendant counsel | Joshua B. Pond | Attorney | Counsel for ScentAir Technologies, LLCSearch in Eureka ↗ |
| Defendant counsel | Kathleen R. Geyer | Attorney | Counsel for ScentAir Technologies, LLCSearch in Eureka ↗ |
| Defendant counsel | Kevin M. Bell | Attorney | Counsel for ScentAir Technologies, LLCSearch in Eureka ↗ |
| Defendant counsel | Megan E. Hunt | Attorney | Counsel for ScentAir Technologies, LLCSearch in Eureka ↗ |
| Defendant counsel | Molly A. Jones | Attorney | Counsel for ScentAir Technologies, LLCSearch in Eureka ↗ |
| Defendant counsel | Nicoletta M. Kennedy | Attorney | Counsel for ScentAir Technologies, LLCSearch in Eureka ↗ |
| Defendant counsel | Ryan Fitzgerald | Attorney | Counsel for ScentAir Technologies, LLCSearch in Eureka ↗ |
| Defendant counsel | Stephanie E. O’Byrne | Attorney | Counsel for ScentAir Technologies, LLCSearch in Eureka ↗ |
| Defendant counsel | Steven L. Caponi | Attorney | Counsel for ScentAir Technologies, LLCSearch in Eureka ↗ |
| Defendant counsel | Vincent J. Galluzzo | Attorney | Counsel for ScentAir Technologies, LLCSearch in Eureka ↗ |
| Defendant law firm | DLA Piper LLP | Law Firm | Representing ScentAir Technologies, LLCSearch in Eureka ↗ |
| Defendant law firm | DLA Piper LLP (US) | Law Firm | Representing ScentAir Technologies, LLCSearch in Eureka ↗ |
| Defendant law firm | K&L Gates LLP | Law Firm | Representing ScentAir Technologies, LLCSearch in Eureka ↗ |
| Presiding judge | Judge William C. Bryson | Judge | Delaware District CourtSearch in Eureka ↗ |
Official order — verbatim text
The stipulation invokes FRCP 41(a)(1)(ii) — a bilateral mechanism requiring no court approval — and expressly designates the dismissal as without prejudice. This phrasing preserves Prolitec’s full claim set against ScentAir. Notably, the equal cost allocation, rather than fee-shifting toward either party, is consistent with a negotiated exit rather than a concession. No counterclaim disposition is specified beyond the mutual dismissal, leaving ScentAir’s counterclaims similarly unresolved on the merits.
US9745976B2 — Automated Scent Diffusion System Control Technology
The seven patents asserted by Prolitec span a broad cross-section of ambient scent delivery technology, encompassing hardware diffusion devices, fluid management systems, networked control software, and system configuration methods. Application dates across the portfolio range from the mid-2000s through the mid-2010s, reflecting Prolitec’s sustained R&D investment in commercial scent marketing infrastructure. The breadth of this portfolio — seven patents covering both apparatus and method claims — is consistent with a company seeking to establish comprehensive IP control over automated scent deployment for commercial environments.
For competitors in the ambient scent and sensory marketing sector, this portfolio presents a layered risk profile. The inclusion of software-facing patents alongside hardware patents means that product redesign alone may not achieve clearance — service platforms and control applications may require independent FTO analysis. ScentAir’s Breeze product was the named target, but the claim scope of patents such as US8855827B2 and US9480767B1 may extend to competing scent delivery systems from other manufacturers, making this a sector-wide concern rather than a bilateral dispute.
Should you run an FTO analysis against Prolitec’s scent delivery patent portfolio?
Any company developing, manufacturing, or commercialising automated scent diffusion hardware, control software, or networked scent delivery systems should treat the Prolitec patent portfolio as a live risk. The seven patents in this case were never invalidated, and the without-prejudice dismissal leaves Prolitec free to enforce against ScentAir or third parties. Product teams building ambient scent solutions for hospitality, retail, or commercial environments are the primary audience for this FTO.
PatSnap Eureka’s FTO Search Agent can map your product’s feature set against the claim language of all seven Prolitec patents, flag prior art that may support invalidity arguments, and surface related prosecution history. Eureka also monitors for new continuations or divisional filings from Prolitec that could extend the portfolio’s reach — an important watch for R&D teams planning product roadmaps in automated scent delivery.
Run a freedom-to-operate analysis on US9745976B2 to assess your product’s exposure
Run FTO in Eureka →Related Patent Litigation in Scent Delivery & Sensory Technology
Cases involving automated scent diffusion and sensory marketing patents in Delaware and other US district courts, with comparable multi-patent assertion strategies.
What this case signals for the ambient scent technology IP landscape
A five-year, seven-patent standoff that ends without a merits ruling leaves critical IP questions unanswered for the entire scent delivery sector.
Seven untested patents represent a live enforcement risk for scent tech competitors
Prolitec’s patent portfolio covering scent diffusion control, automated delivery, and related software was never invalidated or found non-infringing. Any company commercialising ambient scent delivery hardware or software should assess exposure against these seven patents before scaling product lines adjacent to ScentAir Breeze functionality.
Dismissal without prejudice is not resolution — monitor for refiling activity
The without-prejudice designation means Prolitec can refile at any time within the applicable limitations period. IP professionals tracking this space should monitor Prolitec’s filing activity and any new litigation against ScentAir or third parties, as a refiling could reactivate the full seven-patent claim set with damages running from original notice dates.
Prolitec v ScentAir — key questions answered
The case was dismissed without prejudice by stipulation on May 14, 2025, after nearly five years of litigation. Prolitec had asserted seven patents covering scent diffusion and delivery systems against ScentAir’s Breeze product. No court ruled on the merits; each side agreed to bear its own costs and attorneys’ fees.
A dismissal without prejudice means Prolitec’s infringement claims were not adjudicated on the merits. All seven patents remain valid and enforceable as issued. Prolitec retains the right to refile claims against ScentAir or to assert the patents against other parties, subject to applicable statutes of limitations and any undisclosed agreements between the parties.
Prolitec asserted US9745976B2, US9446162B2, US20050249419A1, US9460404B2, US9480767B1, US9162004B1, and US8855827B2. The portfolio spans scent diffusion hardware, automated delivery systems, network control software, and fluid management technology, collectively covering the core operational elements of commercial ambient scent systems.
ScentAir’s ScentAir Breeze product and its related software were the accused instrumentalities in this case. The Breeze is a commercial ambient scent delivery system. The dual hardware-and-software scope of Prolitec’s patent assertions meant both the physical device and its control platform were implicated in the infringement claims.
The case was presided over by Judge William C. Bryson in the United States District Court for the District of Delaware. It ran for 1,755 days from filing on July 24, 2020 to dismissal on May 14, 2025 — approximately 4 years and 10 months, which is considerably longer than the median duration for patent cases in US district courts.
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