Air Products v. Evonik: Federal Circuit Appeal Dismissed in 30 Days
Air Products and Chemicals, Inc. brought an appeal against Evonik Operations GmbH at the Court of Appeals for the Federal Circuit over US10471380B2, covering a process for gas separation with reduced maintenance costs. The parties agreed to dismiss the appeal under Fed. R. App. P. 42(b) within just 30 days of filing, with each side bearing its own costs.
A swift consensual exit from the Federal Circuit in a gas-separation patent dispute
Air Products and Chemicals, Inc. filed an appeal at the Court of Appeals for the Federal Circuit on 21 October 2025, challenging proceedings related to US10471380B2 — a patent covering a process for the separation of gases with reduced maintenance costs. The opposing party, Evonik Operations GmbH, is a major German specialty-chemicals group active in industrial gas and membrane-separation technologies. The underlying dispute was framed as an invalidity/cancellation action on patentability grounds.
The appeal was terminated on 20 November 2025 — just 30 days after filing — when both parties agreed to dismiss under Federal Rule of Appellate Procedure 42(b). The court ordered the proceeding dismissed and directed each side to bear its own costs. Because the dismissal was consensual and no merits briefing was completed, the Federal Circuit issued no substantive ruling on the validity of US10471380B2 or the correctness of the decision below.
The speed of resolution — 30 days — is notably short even for a consented Federal Circuit dismissal and suggests the parties may have reached a broader commercial or licensing arrangement, though the public record is silent on any underlying terms. The mutual cost-bearing order is consistent with a negotiated resolution rather than a unilateral withdrawal. Whether the underlying validity dispute over the gas-separation process has been fully resolved or merely paused remains unknown from available court filings.
Filing to Appeal Dismissed in 30 days
30 days from filing to dismissal — well below the Federal Circuit median appeal duration
Appeal dismissed by agreement: what the Fed. R. App. P. 42(b) order means
Fed. R. App. P. 42(b): a consensual procedural exit
Rule 42(b) allows parties to jointly stipulate dismissal of a Federal Circuit appeal at any time before judgment. Unlike a merits disposition, it produces no precedential ruling and leaves the appellate record effectively blank. The court retains no jurisdiction over the substance of the dispute after the order issues. Critically, no finding on patent validity, claim scope, or the correctness of the decision below was made.
No merits rulingUS10471380B2 validity remains unresolved at appellate level
The appeal concerned an invalidity/cancellation action, meaning the underlying proceeding questioned whether US10471380B2 should survive. Because the Federal Circuit dismissed without reaching the merits, the patent’s status depends entirely on the outcome below — which the public record does not conclusively resolve at this appellate stage. Third parties cannot rely on this dismissal as either confirmation of validity or confirmation of invalidity.
Status unresolved on appealEvonik avoids an adverse appellate ruling — but so does Air Products
A consensual Rule 42(b) dismissal is neutral on the merits for both sides. Evonik Operations GmbH neither obtained a Federal Circuit invalidity ruling nor faced an affirmance of the patent. Air Products similarly preserved its position without risking an adverse outcome. The symmetry of the cost order — each side bearing its own — is consistent with a negotiated compromise rather than a concession by either party.
Neutral; no merits findingSwift settlement signals possible licensing or commercial resolution
Dismissal within 30 days of filing — before any substantive briefing — typically signals that the parties resolved their commercial dispute outside the courtroom. In the industrial gas-separation sector, licensing arrangements or cross-licensing deals are a common driver of such swift exits. Competitors and technology licensees in gas separation and membrane-process IP should monitor both parties’ patent portfolios for subsequent licensing activity or new litigation.
Possible licensing resolutionFull party and counsel information
| Role | Name | Type | Detail |
|---|---|---|---|
| Plaintiff | Air Products and Chemicals, Inc. | Company | Industrial gases and chemicals company — holder of US10471380B2Search in Eureka ↗ |
| Defendant | EVONIK OPERATIONS GMBH | Company | Evonik Operations GmbH — German specialty-chemicals and industrial-gas groupSearch in Eureka ↗ |
| Plaintiff counsel | Casey Kraning | Attorney | Counsel for Air Products and Chemicals, Inc.Search in Eureka ↗ |
| Plaintiff counsel | John R. Lane | Attorney | Counsel for Air Products and Chemicals, Inc.Search in Eureka ↗ |
| Plaintiff law firm | Fish & Richardson LLP | Law Firm | Representing Air Products and Chemicals, Inc.Search in Eureka ↗ |
| Defendant counsel | Janet B. Linn | Attorney | Counsel for EVONIK OPERATIONS GMBHSearch in Eureka ↗ |
| Defendant counsel | Nels T. Lippert | Attorney | Counsel for EVONIK OPERATIONS GMBHSearch in Eureka ↗ |
| Defendant counsel | Philip Y. Braginsky | Attorney | Counsel for EVONIK OPERATIONS GMBHSearch in Eureka ↗ |
| Defendant counsel | Sandra Adele Hudak | Attorney | Counsel for EVONIK OPERATIONS GMBHSearch in Eureka ↗ |
| Defendant law firm | Tarter Krinsky & Drogin LLP | Law Firm | Representing EVONIK OPERATIONS GMBHSearch in Eureka ↗ |
| Presiding judge | Judge N/A | Judge | Court of Appeals for the Federal CircuitSearch in Eureka ↗ |
Official order — verbatim text
The order’s language — ‘The parties having so agreed’ — confirms this was a fully consensual dismissal under Fed. R. App. P. 42(b), not a unilateral withdrawal. No standard of appellate review was applied and no finding on the merits of the patentability challenge was made. The cost neutrality order reinforces the consensual nature of the exit. The phrasing leaves open whether any underlying licensing or settlement agreement accompanied the dismissal; the court record is silent on those terms.
US10471380B2 — Gas separation process with reduced maintenance costs
US10471380B2, filed under application number US15/540709, protects a process for the separation of gases engineered to reduce maintenance costs — a technically and commercially significant advance in industrial gas processing. Gas-separation processes are foundational to petrochemical refining, hydrogen production, air-separation units, and specialty-gas manufacturing. The ‘reduced maintenance costs’ designation suggests the patent addresses operational efficiency in separation plant design, potentially covering membrane systems, pressure-swing adsorption configurations, or related continuous-process architectures.
For Air Products — one of the world’s largest industrial gas producers — protecting process-efficiency patents of this type is a core competitive strategy. Evonik Operations GmbH is a direct competitor in specialty-gas separation membranes and hollow-fibre technology. Invalidity proceedings against this patent, followed by a swift Federal Circuit appeal dismissal, suggest the asset is sufficiently commercially sensitive to motivate rapid resolution. Companies operating gas-separation plants or licensing process technology from either party should treat this patent as an active enforcement risk and assess claim coverage against their specific process configurations.
Should you run an FTO against US10471380B2?
Any R&D team or operations group deploying industrial gas-separation processes — particularly those targeting reduced maintenance cost profiles through novel plant configurations, membrane architectures, or adsorption cycle designs — should assess their exposure to US10471380B2. The patent survived a Federal Circuit appeal cycle without invalidation, leaving its claims fully intact. Process licensees, EPC contractors specifying separation plant design, and technology integrators in hydrogen, nitrogen, or oxygen production are all potentially within scope.
PatSnap Eureka’s FTO Search Agent can map your specific process parameters against the granted claims of US10471380B2, surface related continuation and divisional applications in Air Products’ gas-separation portfolio, and identify any post-grant proceedings that may have narrowed or confirmed claim scope. Eureka also tracks litigation history for both Air Products and Evonik, giving your IP team a real-time view of enforcement patterns across the industrial gas-separation sector.
Run a freedom-to-operate analysis on US10471380B2 to assess your product’s exposure
Run FTO in Eureka →Similar Federal Circuit appeals in industrial gas and chemical process patents
Federal Circuit appeals involving gas-separation and industrial-chemical process patents dismissed by agreement — comparable patentability disputes at the same appellate level.
What this case signals for industrial gas-separation IP strategy
A 30-day Federal Circuit exit in a patentability appeal suggests commercial pragmatism — and raises questions every gas-separation IP practitioner should consider.
Rule 42(b) dismissals leave the patent’s validity clock running
When a Federal Circuit appeal is dismissed by agreement without a merits ruling, any lower-level validity determination (or lack thereof) stands. Competitors cannot treat a Rule 42(b) order as a green light to design around or copy the claimed process — US10471380B2 remains an active enforceable asset until formally invalidated or expired.
Speed of resolution is a strong signal of off-docket settlement activity
Appeals dismissed in under 30 days almost always reflect a deal struck before briefs are due. In industrial-gas and specialty-chemical IP, such deals frequently involve supply agreements, licensing terms, or cross-licensing of related process patents. Monitoring subsequent commercial filings by both Air Products and Evonik may reveal the shape of any broader arrangement.
Air v EVONIK — key questions answered
The Rule 42(b) dismissal means the Federal Circuit issued no ruling on the merits of the patentability challenge. US10471380B2 remains an enforceable granted patent. The dismissal neither confirms nor invalidates the patent’s claims — third parties cannot rely on it as a precedent for either position.
The appeal was dismissed by joint agreement under Fed. R. App. P. 42(b) just 30 days after filing, before any merits briefing. This pace is consistent with the parties having reached a commercial resolution — potentially a licensing arrangement or settlement — outside the court process. The public record does not disclose the terms of any such agreement.
US10471380B2 (application US15/540709) is an Air Products and Chemicals patent covering a process for the separation of gases with reduced maintenance costs. It is relevant to industrial gas processing including potentially membrane-based, pressure-swing adsorption, or related continuous separation technologies. The underlying invalidity challenge by Evonik suggests commercial significance in the specialty-gas sector.
Air Products was represented by Casey Kraning and John R. Lane of Fish & Richardson LLP. Evonik Operations GmbH was represented by Janet B. Linn, Nels T. Lippert, Philip Y. Braginsky, and Sandra Adele Hudak of Tarter Krinsky & Drogin LLP. The case settled before any substantive appellate briefs were filed.
No. The court ordered each side to bear its own costs, which is the standard outcome in a consensual Rule 42(b) dismissal. A mutual cost-bearing order is consistent with a negotiated resolution and does not indicate that either party conceded or prevailed. It provides no signal about the underlying merits of the patentability challenge.
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