S.J. Electro Systems v. Alderon Industries: Dismissed With Prejudice in 209 Days
S.J. Electro Systems, LLC filed a patent infringement action against Alderon Industries, LLC in the District of Minnesota, asserting US8737672B1 covering a water resistant alarm system. The case resolved in 209 days via a stipulated dismissal with prejudice and on the merits, with no costs or attorneys' fees awarded to either party.
A swift stipulated end to a water alarm system patent dispute
On January 26, 2023, S.J. Electro Systems, LLC filed a patent infringement action against Alderon Industries, LLC in the U.S. District Court for the District of Minnesota (Case No. 0:23-cv-00199). The asserted patent is US8737672B1, which covers a water resistant alarm system — a technology focused on fluid detection and alerting. S.J. Electro Systems was represented by Taft, Stettinius & Hollister LLP, while Alderon was represented by Patterson Thuente Pederson PA and Smith Jadin Johnson PLLC.
The case closed on August 23, 2023, 209 days after filing. The recorded basis of termination is 'Dismissed with Prejudice.' The docket order states that, pursuant to the parties' Stipulation of Dismissal with Prejudice (ECF No. 39, filed August 22, 2023), the action was dismissed with prejudice and on the merits, without costs, disbursements, or attorneys' fees to any party. The specific terms underlying the parties' agreement to stipulate are not disclosed in the available record.
The 209-day duration — resolved before any trial or significant merits ruling on record — suggests the parties reached a private resolution relatively early in the litigation lifecycle. What drove the parties to stipulate at this stage, and whether any commercial arrangement accompanied the dismissal, is not disclosed in the available public record.
See Complete Case & Patent Analysis →Filing to Dismissed with Prejudice in 209 days
from filing to dismissal — a relatively swift resolution for a district court patent case
US8737672B1 — Water Resistant Alarm System
Any company manufacturing, importing, or distributing water resistant alarm systems, flood detection devices, or related fluid-alerting hardware should assess whether their products fall within the claim scope of US8737672B1. The patent holder has demonstrated willingness to litigate in federal court, and the dismissal of this action against Alderon does not restrict future enforcement against other parties. R&D and product teams developing next-generation moisture or fluid detection products should treat this patent as an active risk requiring formal FTO review.
Official order — verbatim text
The court's order adopts the parties' stipulation verbatim, dismissing the action with prejudice, on the merits, and without costs to any party. A dismissal 'on the merits' carries claim-preclusive effect, meaning S.J. Electro Systems is barred from reasserting these specific claims against Alderon. The mutual waiver of costs reflects a negotiated exit; the underlying commercial terms, if any, are not part of the public record.
Dismissed with prejudice: what the agreed resolution means for both parties
Dismissal with prejudice bars any refiling of these claims
A dismissal with prejudice and on the merits is a final adjudication that extinguishes the plaintiff's right to refile the same claims against the same defendant. Entered by the court on stipulation of both parties (ECF No. 39), this order has the legal force of a final judgment. The public record does not disclose what, if any, terms the parties agreed upon beyond the dismissal itself.
Claim-preclusive final judgmentS.J. Electro Systems cannot reassert these claims against Alderon
As the plaintiff, S.J. Electro Systems agreed to a dismissal with prejudice, relinquishing its right to re-litigate these specific infringement claims against Alderon under US8737672B1 in this action. The patent itself remains in force and may still be asserted against other parties. No costs or fees were awarded to or against S.J. Electro Systems.
Patent remains enforceable vs. third partiesAlderon is permanently shielded from this specific action
The dismissal with prejudice means Alderon Industries cannot face a second lawsuit from S.J. Electro Systems based on the same infringement claims asserted here. Alderon was not required to pay any costs, disbursements, or attorneys' fees. Whether Alderon made any other arrangement with the plaintiff is not disclosed in the available public record.
Protected from refiling by plaintiffUS8737672B1 remains a live enforcement risk for the wider market
The dismissal resolves only this bilateral dispute. US8737672B1, covering water resistant alarm system technology, remains an active patent and a potential enforcement tool against other manufacturers or distributors operating in the fluid detection and alerting space. Competitors and product teams should assess their exposure independently of this outcome.
Broad enforcement risk persistsFull party and counsel information
| Role | Name | Type | Detail |
|---|---|---|---|
| Plaintiff | S. J. Electro Systems, LLC | Company | /Search in Eureka ↗ |
| Defendant | Alderon Industries, LLC | Company | /Search in Eureka ↗ |
| Plaintiff counsel | Anton Christopher Brown | Attorney | Counsel for S. J. Electro Systems, LLCSearch in Eureka ↗ |
| Plaintiff counsel | Kathryn Mary Short | Attorney | Counsel for S. J. Electro Systems, LLCSearch in Eureka ↗ |
| Plaintiff counsel | Kristine M. Boylan | Attorney | Counsel for S. J. Electro Systems, LLCSearch in Eureka ↗ |
| Plaintiff counsel | Mike Etienne | Attorney | Counsel for S. J. Electro Systems, LLCSearch in Eureka ↗ |
| Plaintiff law firm | Taft, Stettinius & Hollister LLP | Law Firm | Representing S. J. Electro Systems, LLCSearch in Eureka ↗ |
| Defendant counsel | Jeffer Ali | Attorney | Counsel for Alderon Industries, LLCSearch in Eureka ↗ |
| Defendant counsel | John Wittmer | Attorney | Counsel for Alderon Industries, LLCSearch in Eureka ↗ |
| Defendant law firm | Patterson Thuente Pederson PA | Law Firm | Representing Alderon Industries, LLCSearch in Eureka ↗ |
| Defendant law firm | Smith Jadin Johnson PLLC | Law Firm | Representing Alderon Industries, LLCSearch in Eureka ↗ |
| Presiding judge | Judge N/A | Judge | Minnesota District CourtSearch in Eureka ↗ |
R&D signals in the water resistant alarm and fluid detection space
Forward-looking patent and innovation intelligence derived from the S.J. Electro Systems v. Alderon dispute and the broader water resistant alarm technology landscape.
S.J. Electro Systems' alarm technology patent holdings
S.J. Electro Systems' assertion of US8737672B1 suggests an active IP enforcement posture in the water resistant alarm segment. Mapping the company's full portfolio — including any continuations, divisionals, or related applications — can reveal the breadth of their exclusivity and anticipated areas of future R&D or assertion activity in fluid detection hardware.
Plaintiff portfolio depthFiling trends in water resistant alarm and flood detection patents
The water resistant alarm and flood detection sector has seen growing patenting activity as building automation and IoT-enabled moisture sensing converge. Tracking filing trends around alarm system architectures, fluid ingress detection, and wireless alerting can surface emerging competitors and identify where innovation is clustering relative to US8737672B1's claim space.
Growing IoT moisture detection filingsAlderon Industries' patent position in fluid alarm hardware
As the defendant in this infringement action, Alderon Industries' own patent portfolio and product design posture in the water alarm hardware space is worth monitoring. Understanding whether Alderon holds defensive IP, has filed continuation applications, or has shifted product architecture post-litigation can inform competitive intelligence for others in the fluid detection market.
Defendant defensive IP watchDesign-around and adjacent innovation near US8737672B1
The claim scope of US8737672B1 in water resistant alarm architecture may leave adjacent white space in areas such as wireless fluid sensing, multi-sensor integration, cloud-connected alerting, or advanced materials for moisture sealing. R&D teams can use prior art mapping and claim charting to identify design-around paths or novel filing opportunities in the broader alarm system ecosystem.
Adjacent claim white spaceSimilar water alarm and fluid detection patent cases in U.S. district courts
Explore related patent infringement actions involving water resistant alarm and fluid detection technology filed in U.S. district courts, including cases in the District of Minnesota.
What this case signals for the water alarm and fluid detection IP landscape
A rapid stipulated exit in a water alarm patent dispute leaves key enforcement questions unanswered — and the patent fully intact.
US8737672B1 remains enforceable — third parties should assess exposure now
The dismissal with prejudice resolves only the dispute with Alderon. S.J. Electro Systems retains full enforcement rights under US8737672B1 against other parties in the water resistant alarm and fluid detection market. Companies competing in this space should conduct targeted FTO analysis against this patent before expanding product lines.
Rapid resolution without fee shifting is a signal worth monitoring
The 209-day timeline and mutual waiver of costs suggests both parties found value in a quick exit. This pattern — early stipulated dismissal with prejudice, no costs — is consistent with a private commercial resolution, though the specific terms are not disclosed. IP teams should track whether S.J. Electro Systems files further actions in this technology area.
S. v Alderon — key questions answered
The case was dismissed with prejudice and on the merits. On August 22, 2023, the parties filed a Stipulation of Dismissal with Prejudice (ECF No. 39), and the court entered the dismissal order on August 23, 2023. No costs, disbursements, or attorneys' fees were awarded to either party. The specific terms of any underlying agreement are not disclosed in the public record.
S.J. Electro Systems asserted US8737672B1, filed under application number US13/913753. The patent covers a water resistant alarm system — technology in the fluid detection and alerting domain. The patent remains in force and enforceable against third parties following the dismissal of this action.
A dismissal with prejudice and on the merits has claim-preclusive effect. It means S.J. Electro Systems is permanently barred from filing a new lawsuit against Alderon Industries based on the same infringement claims asserted in this action. However, the patent US8737672B1 remains valid and enforceable against other defendants not party to this stipulation.
No. The court's dismissal order explicitly states that the action was dismissed without costs, disbursements, or attorneys' fees to any party. This mutual fee waiver was part of the parties' agreed stipulation of dismissal.
The case lasted 209 days, from filing on January 26, 2023 to closure on August 23, 2023. This relatively swift resolution — before trial or any substantive merits ruling on the public record — is consistent with the parties reaching a private arrangement, though no specific terms are disclosed. IP professionals should monitor S.J. Electro Systems' docket activity for signals of further enforcement in the water alarm technology sector.
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