Shelstad v. Bardex Corp: Mooring Patent Suit Dismissed for Lack of Jurisdiction
Individual inventor Delmer L. Shelstad filed suit against marine equipment specialist Bardex Corporation in the Texas Southern District Court, asserting US10676160B2 covering mooring and tensioning systems and apparatus. After 561 days, Judge Andrew Hanen dismissed the case without prejudice — not on the merits, but because the court found it lacked subject matter jurisdiction.
A Mooring Patent Dispute Ends on Jurisdiction, Not Merits
On July 13, 2023, individual inventor Delmer L. Shelstad filed a patent infringement action against Bardex Corporation in the U.S. District Court for the Southern District of Texas (Case No. 4:23-cv-02570), presided over by Judge Andrew S. Hanen. Shelstad asserted US10676160B2, a patent covering mooring and tensioning methods, systems, and apparatus — technology squarely within Bardex’s commercial focus as a marine and offshore mooring equipment manufacturer.
The case closed on January 24, 2025, when Judge Hanen granted Bardex’s motion for summary judgment solely on the issue of subject matter jurisdiction. The court concluded it lacked jurisdiction to adjudicate Shelstad’s infringement claim, resulting in a dismissal without prejudice. Critically, the court made no ruling on infringement, validity, or any other substantive patent question — meaning neither party received a merits-based determination.
The 561-day duration before a jurisdictional dismissal suggests the jurisdictional defect was not immediately apparent or was contested through briefing before the court resolved it. The public record does not specify the precise jurisdictional defect — whether standing, constitutional Article III requirements, or another basis — but a dismissal without prejudice preserves Shelstad’s ability to refile in a court with proper jurisdiction, assuming applicable statutes of limitations have not run.
Filing to Dismissed without Prejudice in 561 days
561 days in court — above the median for dismissed patent cases in the Texas Southern District
Dismissed without prejudice: what the jurisdictional ruling means for both parties
Jurisdiction dismissed — no merits ruling issued
A dismissal without prejudice on jurisdictional grounds means the court determined it had no authority to hear the case — not that the plaintiff’s infringement claims lacked substance. Subject matter jurisdiction is a threshold requirement; without it, a federal court cannot rule on any other motion. The infringement merits of US10676160B2 remain entirely unresolved by this proceeding.
Threshold jurisdictional barNo merits loss — but refiling carries risk
A without-prejudice dismissal technically allows Shelstad to refile in a court with proper subject matter jurisdiction. However, refiling requires identifying and curing the specific jurisdictional defect — which the public record does not detail. Time-sensitive considerations such as statutes of limitations and potential intervening defenses mean the practical window to refile may be narrower than the procedural door suggests.
Refile option preservedBardex escapes on procedure — patent threat persists
Bardex Corporation secured dismissal without any finding on infringement or the validity of US10676160B2. While this terminates the immediate litigation, it does not extinguish the patent or render Bardex’s products cleared. If Shelstad refiles with proper jurisdictional standing, Bardex faces the same substantive infringement exposure. Bardex’s legal team will likely monitor Shelstad’s next steps closely.
No infringement findingMooring IP dispute unresolved — sector uncertainty remains
US10676160B2 covers mooring and tensioning methods, systems, and apparatus — technology central to offshore energy, shipping, and marine infrastructure sectors. Because the case was dismissed on jurisdiction rather than merits, the enforceability and scope of the patent are untested. Competitors and licensees in the mooring equipment space cannot treat this dismissal as a clearance signal; the patent remains active and its litigation risk is unresolved.
Patent enforceability untestedFull party and counsel information
| Role | Name | Type | Detail |
|---|---|---|---|
| Plaintiff | Delmer L. Shelstad | Individual | Individual inventor and patent holder of US10676160B2, mooring and tensioning systemsSearch in Eureka ↗ |
| Defendant | Bardex Corporation | Company | Bardex Corporation — marine and offshore mooring equipment manufacturerSearch in Eureka ↗ |
| Plaintiff counsel | Alan K. Breaud | Attorney | Counsel for Delmer L. ShelstadSearch in Eureka ↗ |
| Plaintiff counsel | Jesse Dillard Lambert | Attorney | Counsel for Delmer L. ShelstadSearch in Eureka ↗ |
| Plaintiff law firm | Attorney at Law PLLC | Law Firm | Representing Delmer L. ShelstadSearch in Eureka ↗ |
| Plaintiff law firm | Breaud & Meyers | Law Firm | Representing Delmer L. ShelstadSearch in Eureka ↗ |
| Defendant counsel | Jason Erik Mueller | Attorney | Counsel for Bardex CorporationSearch in Eureka ↗ |
| Defendant counsel | Lauren Anne Kickel | Attorney | Counsel for Bardex CorporationSearch in Eureka ↗ |
| Defendant counsel | Steven R. Rech | Attorney | Counsel for Bardex CorporationSearch in Eureka ↗ |
| Defendant law firm | Vorys Sater Seymour Pease, LLP | Law Firm | Representing Bardex CorporationSearch in Eureka ↗ |
| Defendant law firm | Vorys Sater Et Al | Law Firm | Representing Bardex CorporationSearch in Eureka ↗ |
| Presiding judge | Judge Andrew S Hanen | Judge | Texas Southern District CourtSearch in Eureka ↗ |
Official order — verbatim text
The court’s ruling is narrowly confined to subject matter jurisdiction — it grants Bardex’s summary judgment motion solely on that threshold question and expressly declines to rule on any other pending motions. The phrase ‘solely to the extent that raises the question of whether this court possesses subject matter jurisdiction’ signals judicial restraint: no infringement, validity, or claim construction analysis was conducted. The without-prejudice dismissal reflects the absence of any merits adjudication, preserving both parties’ substantive positions entirely for any future proceeding.
US10676160B2 — Mooring and Tensioning Methods, Systems, and Apparatus
US10676160B2, filed under application number US16/172285, protects mooring and tensioning methods, systems, and apparatus. Mooring technology is foundational to offshore energy platforms, vessels, and marine infrastructure — systems that must withstand dynamic loads from tidal forces, wave action, and operational stresses. Patents in this domain typically cover the mechanical and control-system innovations that improve reliability, safety, and deployment efficiency of mooring arrangements.
For a specialist marine equipment manufacturer like Bardex Corporation, whose commercial portfolio includes mooring and load-handling systems, a patent of this scope asserted by an individual inventor represents a meaningful IP risk. The patent’s existence and unadjudicated status means it remains a live competitive threat. Companies developing or selling mooring winches, tensioners, or integrated mooring management systems should assess claim overlap before launching or continuing products in this space.
Should you run an FTO analysis against US10676160B2?
If your organisation designs, manufactures, or supplies mooring systems, tensioning apparatus, or related marine infrastructure equipment, US10676160B2 warrants careful review. This case ended without any judicial determination of infringement or invalidity, meaning the patent’s claims have never been tested — and remain fully enforceable. Product teams developing mooring winches, dynamic positioning anchoring systems, or tensioner assemblies should not assume this dismissal provides any clearance.
PatSnap Eureka’s FTO Search Agent enables R&D and IP teams to map the claim scope of US10676160B2 against current product specifications, identify potentially overlapping prior art, and surface related patents in the mooring and offshore equipment landscape. With enforcement risk still live and no merits ruling on record, a structured FTO review is the most defensible step for any company competing in this technology space.
Run a freedom-to-operate analysis on US10676160B2 to assess your product’s exposure
Run FTO in Eureka →Similar Marine Mooring Patent Disputes in U.S. District Courts
Patent infringement cases involving marine mooring and tensioning technology filed in U.S. district courts, including the Texas Southern District.
What this case signals for the marine mooring IP landscape
A jurisdictional dismissal without merits resolution leaves patent risk live. Here is what practitioners and product teams should track.
Jurisdictional dismissals do not clear the patent — monitor for refile
US10676160B2 remains in force and fully enforceable. Any company operating in the mooring and tensioning equipment space that considered this dismissal a clean exit should revisit that assumption. Shelstad retains the right to refile, and the substantive infringement question has never been tested before any court.
Subject matter jurisdiction is a threshold trap in individual-inventor suits
Individual inventors asserting patents face heightened scrutiny around standing and ownership chains. If the jurisdictional defect here relates to title or assignment, it suggests due diligence on patent ownership records is essential before filing — or before assuming a competitor’s suit will fail on procedure alone.
Shelstad v Bardex — key questions answered
The case was dismissed without prejudice on January 24, 2025. Judge Andrew Hanen granted Bardex’s motion for summary judgment solely on the issue of subject matter jurisdiction, finding the court lacked jurisdiction to hear Shelstad’s infringement claims. No merits ruling on infringement or patent validity was issued.
Shelstad asserted US10676160B2, filed under application number US16/172285. The patent covers mooring and tensioning methods, systems, and apparatus — technology directly relevant to Bardex’s marine and offshore equipment business.
No. The dismissal was on jurisdictional grounds only — the court made no determination on infringement or the validity of US10676160B2. The patent remains in force and enforceable. Companies in the mooring equipment space cannot treat this outcome as a clearance against the patent.
A dismissal without prejudice preserves the plaintiff’s right to refile in a court with proper subject matter jurisdiction. However, refiling requires identifying and curing the specific jurisdictional defect. Practical constraints such as statutes of limitations may narrow the effective window for any new action.
The public court record does not specify the precise nature of the jurisdictional defect. The court granted summary judgment solely on whether it possessed subject matter jurisdiction and declined to rule on any other motion. The specific basis — whether standing, ownership, or another constitutional or statutory requirement — is not detailed in the available termination record.
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