GCE Gas Control v. 3B Medical: Oxygen Concentrator Patent Case Dismissed With Prejudice
GCE Gas Control Equipment filed a declaratory judgment action in Maryland District Court against 3B Medical Manufacturing over two patents covering removable cartridges for oxygen concentrators. The case closed after 779 days via stipulated dismissal with prejudice — a resolution that bars any refiling of the same claims.
DJ Action Over Oxygen Concentrator Cartridge Patents Ends With Finality
GCE Gas Control Equipment, Inc. filed this declaratory judgment action on October 5, 2022 in the United States District Court for the District of Maryland, seeking a declaration concerning two patents held by 3B Medical Manufacturing, LLC — US10357628B2 and US11389614B2 — both relating to removable cartridge technology for oxygen concentrators. A declaratory judgment posture typically signals that GCE, as a market participant, faced a credible threat of patent infringement claims from 3B Medical and sought to resolve the question of validity or non-infringement proactively.
The case closed on November 22, 2024, via a Stipulation of Dismissal with prejudice. Dismissal with prejudice is a final adjudication on the merits as a matter of law — neither party may refile the same claims in federal court. The stipulated nature of the dismissal indicates both parties consented to the termination, which is consistent with either a negotiated settlement or a commercial resolution reached outside of court, though the precise terms are not disclosed in the public record.
At 779 days, the case ran for over two years before resolution — a duration suggesting substantive engagement between the parties rather than a swift early exit. The with-prejudice dismissal provides finality that a without-prejudice filing would not, which may reflect a licensing arrangement, a cross-licence, or a broader commercial agreement between competitors in the medical oxygen equipment space. The underlying financial terms, if any, remain unknown from the public docket.
Filing to Dismissed with Prejudice in 779 days
779 days — above the median duration for patent DJ actions in Maryland District Court
Dismissed with prejudice: what the stipulated resolution means for both parties
Stipulated dismissal with prejudice extinguishes all claims permanently
A stipulated dismissal with prejudice under Fed. R. Civ. P. 41(a)(1)(A)(ii) requires the consent of all parties and operates as a final judgment on the merits. Neither GCE Gas Control nor 3B Medical can refile these specific claims in federal court. The with-prejudice designation is significant in a declaratory judgment context — it forecloses both the DJ claims and, by implication, 3B Medical’s potential infringement counterclaims on the same patents.
Claims permanently barredGCE secures finality — but concedes something to get it
As the declaratory judgment plaintiff, GCE Gas Control sought certainty regarding US10357628B2 and US11389614B2. A with-prejudice stipulation suggests GCE obtained sufficient commercial protection — possibly a licence or covenant not to sue — to justify closing the case permanently. The absence of a court ruling on validity or infringement means GCE did not obtain a public declaration, but the finality of the dismissal still removes the litigation threat tied to these specific patents.
No public declaration issued3B Medical retains patent ownership but loses litigation leverage
US10357628B2 and US11389614B2 remain in 3B Medical’s portfolio — the dismissal does not invalidate the patents. However, by agreeing to a with-prejudice stipulation, 3B Medical has surrendered its ability to pursue infringement claims against GCE based on the conduct underlying this action. Future enforcement against GCE on these patents would require demonstrating distinct, post-dismissal infringing acts not covered by any agreed terms.
Patents intact, enforcement limitedResolution signals a negotiated détente in the oxygen concentrator cartridge market
The medical oxygen concentrator sector is subject to growing patent activity as home-use and portable devices proliferate. A with-prejudice resolution after 779 days — without a trial or claim construction ruling — is consistent with a licensing arrangement or market-sharing agreement. Competitors watching this space should note that both patents remain valid and enforceable against third parties; only GCE has secured effective protection through this proceeding.
Patents remain live against othersFull party and counsel information
| Role | Name | Type | Detail |
|---|---|---|---|
| Plaintiff | GCE Gas Control Equipment, Inc. | Company | Medical gas equipment company — holder of DJ claims against US10357628B2 and US11389614B2Search in Eureka ↗ |
| Defendant | 3B Medical Manufacturing, LLC | Company | 3B Medical Manufacturing, LLC — medical device manufacturer and patent holder in oxygen therapy equipmentSearch in Eureka ↗ |
| Plaintiff counsel | Eric K. Gill | Attorney | Counsel for GCE Gas Control Equipment, Inc.Search in Eureka ↗ |
| Plaintiff counsel | Robert M. Masters | Attorney | Counsel for GCE Gas Control Equipment, Inc.Search in Eureka ↗ |
| Plaintiff counsel | Roy Jung | Attorney | Counsel for GCE Gas Control Equipment, Inc.Search in Eureka ↗ |
| Plaintiff counsel | Timothy P. Cremen | Attorney | Counsel for GCE Gas Control Equipment, Inc.Search in Eureka ↗ |
| Plaintiff law firm | Sheppard Mullin Richter & Hampton LLP | Law Firm | Representing GCE Gas Control Equipment, Inc.Search in Eureka ↗ |
| Defendant counsel | Brian S. Tobin | Attorney | Counsel for 3B Medical Manufacturing, LLCSearch in Eureka ↗ |
| Defendant counsel | David L. Atallah | Attorney | Counsel for 3B Medical Manufacturing, LLCSearch in Eureka ↗ |
| Defendant counsel | J. Stephen Simms | Attorney | Counsel for 3B Medical Manufacturing, LLCSearch in Eureka ↗ |
| Defendant counsel | Timothy Murphy | Attorney | Counsel for 3B Medical Manufacturing, LLCSearch in Eureka ↗ |
| Defendant law firm | Carlson, Gaskey & Olds PC | Law Firm | Representing 3B Medical Manufacturing, LLCSearch in Eureka ↗ |
| Defendant law firm | Simms Showers LLP | Law Firm | Representing 3B Medical Manufacturing, LLCSearch in Eureka ↗ |
| Presiding judge | Judge N/A | Judge | Maryland District CourtSearch in Eureka ↗ |
Official order — verbatim text
The Stipulation of Dismissal with prejudice represents a consensual, final disposition of all claims. In declaratory judgment actions, this phrasing confirms that neither the DJ claims nor any counterclaims on US10357628B2 or US11389614B2 can be relitigated between these parties. Importantly, no claim construction, validity ruling, or infringement finding appears in the public record — meaning the patents’ legal scope remains untested by the court. The dismissal extinguishes GCE’s DJ rights and 3B Medical’s infringement leverage on the conduct at issue, but leaves both patents fully enforceable against the broader market.
US10357628B2 & US11389614B2 — Removable Cartridge Technology for Oxygen Concentrators
US10357628B2 (App. No. US16/006915) and US11389614B2 (App. No. US15/931716) both relate to removable cartridge technology used in oxygen concentrators — devices that separate ambient air to deliver concentrated oxygen to patients with respiratory conditions. The removable cartridge architecture is a critical component in portable and home-use concentrators, governing product interoperability, serviceability, and consumable revenue streams. The patents’ application numbers suggest sequential development within the same technology family, indicating an iterative prosecution strategy by 3B Medical.
In the competitive landscape of respiratory medical devices, removable cartridge patents carry significant commercial weight because they can control aftermarket supply chains and restrict third-party cartridge manufacturers. 3B Medical’s assertion posture — which prompted GCE to file a preemptive DJ action — suggests these patents were viewed as commercially threatening in the oxygen concentrator market. For competitors, the patents remain fully valid and enforceable; the case resolution provides no precedential claim scope guidance that could be used defensively by third parties.
Should you run an FTO against US10357628B2 and US11389614B2?
Any company designing, manufacturing, or distributing removable cartridges for oxygen concentrators should treat these two patents as active FTO concerns. The dismissal with prejudice in this case benefits only GCE Gas Control — it does not create a safe harbour for any other market participant. If your product involves interchangeable or replaceable cartridge assemblies in oxygen delivery systems, exposure to both US10357628B2 and US11389614B2 should be assessed before commercial launch or expansion.
PatSnap Eureka’s FTO Search Agent can map the claim scope of US10357628B2 and US11389614B2 against your product specifications, identify design-around opportunities, and surface related family members that may extend 3B Medical’s coverage. Eureka also tracks 3B Medical’s broader patent portfolio and prosecution history, enabling your IP and R&D teams to anticipate enforcement risk before it becomes a litigation threat — exactly the proactive posture GCE adopted when it filed this action.
Run a freedom-to-operate analysis on US10357628B2 to assess your product’s exposure
Run FTO in Eureka →Similar Patent Cases: Oxygen Concentrator & Medical Device Cartridge Disputes
Explore related declaratory judgment and patent infringement cases involving oxygen concentrator technology and removable medical device cartridges filed in U.S. district courts.
What this case signals for the medical oxygen equipment IP landscape
Two oxygen concentrator cartridge patents survive litigation intact. Third-party competitors remain exposed.
Declaratory judgment actions in medtech are an early-warning tool
GCE’s decision to file a DJ action — rather than wait to be sued — reflects standard risk management when a competitor holds blocking patents on a core component. Companies in the oxygen concentrator, respiratory device, or consumable cartridge space should monitor 3B Medical’s portfolio proactively, as both patents remain enforceable against non-parties to this case.
With-prejudice outcomes reflect deal value, not litigation failure
A stipulated dismissal with prejudice after 779 days typically signals a negotiated outcome with commercial terms attached. IP teams should treat this as a signal that GCE and 3B Medical reached an accommodation — whether licence, cross-licence, or market boundary agreement — that made continued litigation unnecessary. The with-prejudice designation protects both parties from re-litigation.
GCE v 3B — key questions answered
GCE Gas Control Equipment filed a declaratory judgment action against 3B Medical Manufacturing in Maryland District Court on October 5, 2022, concerning patents US10357628B2 and US11389614B2 covering removable cartridges for oxygen concentrators. The case was dismissed with prejudice by stipulation of both parties on November 22, 2024, after 779 days — permanently barring refiling of the same claims.
Dismissal with prejudice is a final disposition on the merits. In a patent DJ context, it means neither the declaratory judgment plaintiff’s claims nor any infringement counterclaims based on the same conduct can be relitigated between these parties. The patents themselves remain valid and enforceable against third parties; only the specific dispute between GCE and 3B Medical is permanently resolved.
The case involved US10357628B2 (App. No. US16/006915) and US11389614B2 (App. No. US15/931716), both held by 3B Medical Manufacturing. Both patents relate to removable cartridge technology for oxygen concentrators — devices used in respiratory therapy. The sequential application numbers suggest the patents form part of a related technology family prosecuted by 3B Medical.
No. The stipulated dismissal with prejudice applies only to the parties — GCE Gas Control and 3B Medical Manufacturing. US10357628B2 and US11389614B2 remain fully enforceable against any other company making, using, or selling removable oxygen concentrator cartridges. Third parties should conduct independent freedom-to-operate analysis against these patents before commercialising competing products.
Declaratory judgment actions are typically filed when a company faces a credible, specific threat of patent infringement claims — such as a cease-and-desist letter or licensing demand — but no lawsuit has yet been filed. Filing a DJ action allows the potential defendant to choose the forum, set the litigation timeline, and seek a judicial declaration of non-infringement or invalidity before being subject to the patent holder’s preferred venue and timing.
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