G. W. Aru & Cochise Technology v. W. R. Grace: Defendant Wins on All Counts After 1,041 Days
G. W. Aru, LLC and Cochise Technology, LLC filed a patent infringement suit against specialty chemicals giant W. R. Grace & Co.-Conn. in the Maryland District Court, asserting US11224864B2 covering CO-to-CO2 combustion promoter technology. After 1,041 days of litigation, the court entered judgment in favor of Grace on every count of the amended complaint.
Grace prevails on the merits in a high-stakes catalyst patent dispute
Filed in October 2022 in the District of Maryland, this case pitted two patent-holding entities — G. W. Aru, LLC and Cochise Technology, LLC (collectively ‘GWA’) — against W. R. Grace & Co.-Conn., a leading specialty chemicals and catalysts company. GWA asserted US11224864B2, a patent covering CO-to-CO2 combustion promoter technology widely used in fluid catalytic cracking (FCC) units in oil refining. The plaintiffs alleged that Grace’s commercial combustion promoter products infringed this patent.
The court entered judgment on the merits in favor of Grace on all counts of GWA’s amended complaint, simultaneously denying GWA’s motions for a permanent injunction and monetary judgment. Grace’s counterclaims were dismissed as moot — a procedural disposition consistent with a defendant’s full merits victory rendering those claims unnecessary to adjudicate. The outcome means GWA recovers nothing and Grace faces no injunction or damages liability arising from this assertion.
At 1,041 days, the litigation ran for nearly three years before reaching a merits judgment — suggesting the case involved substantive claim construction and non-infringement or invalidity disputes rather than an early procedural exit. The public record does not reveal whether the court ruled on invalidity or non-infringement grounds, or both. GWA’s aggressive posture — including a second motion for preliminary injunction and extensive proposed findings — suggests a hard-fought contest, making Grace’s clean sweep across all counts commercially significant for the refining catalyst sector.
Filing to Judgment on the merits for Defendant in 1041 days
1,041 days — nearly three years at district court, suggesting complex Markman and merits proceedings
Judgment for Grace on all counts: what the merits ruling means for both parties
Judgment on the merits: a complete defendant victory
A judgment on the merits for the defendant is the most decisive possible district court outcome short of a pretrial dismissal. The court assessed GWA’s infringement claims substantively and found them insufficient to establish liability. This is not a procedural or technical dismissal — it means the court found Grace’s conduct did not infringe the asserted patent claims. GWA’s motion for permanent injunction and monetary relief was denied alongside, leaving no remedial pathway from this proceeding.
Full merits adjudicationGWA recovers nothing — no injunction, no damages
Both plaintiff entities — G. W. Aru, LLC and Cochise Technology, LLC — leave the litigation empty-handed. The court denied GWA’s motion for proposed findings of fact, conclusions of law, a permanent injunction, and monetary judgment in a single order. GWA may appeal to the Federal Circuit, but the merits ruling creates a substantial burden. Any re-assertion of US11224864B2 against Grace or third parties may also be complicated by the factual record established in this proceeding.
No recovery on any countGrace cleared across all counts — commercial operations protected
W. R. Grace & Co.-Conn. secures a clean slate: no infringement liability, no injunction threatening its combustion promoter product line, and no damages exposure from this assertion. Grace’s counterclaims were dismissed as moot — meaning Grace achieved its litigation objective without needing the court to affirmatively adjudicate its counter-positions. For a company whose refinery catalyst business is commercially significant, removing this patent cloud has direct operational and commercial value.
Full defense on all countsCombustion promoter market: cleared IP headwind for Grace
US11224864B2 covers CO-to-CO2 combustion promoter technology used in FCC units — a technically specialised and commercially concentrated market where Grace is a dominant supplier. This verdict removes a patent assertion that, had it succeeded, could have disrupted Grace’s product line and created leverage for licensing demands. Competitors and customers in the refining catalyst space should note that Grace’s freedom to operate in this segment has been judicially affirmed, though the precise grounds of the ruling remain significant for any future assertion of related patents.
FCC catalyst sector IP risk reducedFull party and counsel information
| Role | Name | Type | Detail |
|---|---|---|---|
| Plaintiff | G. W. Aru, LLC | Company | Patent-holding entities asserting combustion promoter IP — holders of US11224864B2Search in Eureka ↗ |
| Co-Plaintiff | Cochise Technology, LLC | Company | Search in Eureka ↗ |
| Defendant | W. R. Grace & Co.-Conn. | Company | W. R. Grace & Co.-Conn. — global specialty chemicals and refining catalysts companySearch in Eureka ↗ |
| Plaintiff counsel | Angelo J. Christopher | Attorney | Counsel for G. W. Aru, LLCSearch in Eureka ↗ |
| Plaintiff counsel | Erin T. Huntington | Attorney | Counsel for G. W. Aru, LLCSearch in Eureka ↗ |
| Plaintiff counsel | Jennifer Kathryn Squillario | Attorney | Counsel for G. W. Aru, LLCSearch in Eureka ↗ |
| Plaintiff counsel | Joshua J. Pollack | Attorney | Counsel for G. W. Aru, LLCSearch in Eureka ↗ |
| Plaintiff counsel | Juliet J. DeFrancisco | Attorney | Counsel for G. W. Aru, LLCSearch in Eureka ↗ |
| Plaintiff counsel | Kathleen Mallon | Attorney | Counsel for G. W. Aru, LLCSearch in Eureka ↗ |
| Plaintiff counsel | Shawn G. Hansen | Attorney | Counsel for G. W. Aru, LLCSearch in Eureka ↗ |
| Plaintiff law firm | DLA Piper LLP (US) | Law Firm | Representing G. W. Aru, LLCSearch in Eureka ↗ |
| Plaintiff law firm | Nixon Peabody LLP | Law Firm | Representing G. W. Aru, LLCSearch in Eureka ↗ |
| Defendant counsel | Ahmed Jamal Davis | Attorney | Counsel for W. R. Grace & Co.-Conn.Search in Eureka ↗ |
| Defendant counsel | Aldo Ponterosso | Attorney | Counsel for W. R. Grace & Co.-Conn.Search in Eureka ↗ |
| Defendant counsel | Alexander M. Pechette | Attorney | Counsel for W. R. Grace & Co.-Conn.Search in Eureka ↗ |
| Defendant counsel | Caroline Grace Koonce | Attorney | Counsel for W. R. Grace & Co.-Conn.Search in Eureka ↗ |
| Defendant counsel | Irene Hwang | Attorney | Counsel for W. R. Grace & Co.-Conn.Search in Eureka ↗ |
| Defendant counsel | John Gleeson | Attorney | Counsel for W. R. Grace & Co.-Conn.Search in Eureka ↗ |
| Defendant counsel | John M. Neukom | Attorney | Counsel for W. R. Grace & Co.-Conn.Search in Eureka ↗ |
| Defendant counsel | Laura C. Whitworth | Attorney | Counsel for W. R. Grace & Co.-Conn.Search in Eureka ↗ |
| Defendant counsel | Menglin Sun | Attorney | Counsel for W. R. Grace & Co.-Conn.Search in Eureka ↗ |
| Defendant counsel | Michael J. Ballanco | Attorney | Counsel for W. R. Grace & Co.-Conn.Search in Eureka ↗ |
| Defendant counsel | Morgan A Davis | Attorney | Counsel for W. R. Grace & Co.-Conn.Search in Eureka ↗ |
| Defendant counsel | Taylor Caldwell Burgener | Attorney | Counsel for W. R. Grace & Co.-Conn.Search in Eureka ↗ |
| Defendant counsel | Timothy Wayne Riffe | Attorney | Counsel for W. R. Grace & Co.-Conn.Search in Eureka ↗ |
| Defendant law firm | Debevoise & Plimpton LLP | Law Firm | Representing W. R. Grace & Co.-Conn.Search in Eureka ↗ |
| Defendant law firm | Fish & Richardson LLP (Tim Riffe) | Law Firm | Representing W. R. Grace & Co.-Conn.Search in Eureka ↗ |
| Defendant law firm | Fish & Richardson PC | Law Firm | Representing W. R. Grace & Co.-Conn.Search in Eureka ↗ |
| Presiding judge | Judge N/A | Judge | Maryland District CourtSearch in Eureka ↗ |
Official order — verbatim text
The court’s order is sweeping in scope: judgment for Grace on ‘all counts’ of the amended complaint, with GWA’s motions for injunction and monetary relief denied in the same instrument. The dismissal of Grace’s counterclaims ‘as moot’ is legally significant — it confirms that the merits ruling in Grace’s favour was sufficiently complete that the court did not need to adjudicate Grace’s affirmative counter-positions. This phrasing typically indicates a non-infringement finding rather than (or in addition to) invalidity, since an invalidity holding would ordinarily warrant independent adjudication. The public order does not detail the specific legal basis, which creates uncertainty for third-party patent holders in the combustion promoter space.
US11224864B2 — CO to CO2 combustion promoter catalyst
US11224864B2, filed under application number US17/176222, covers a CO-to-CO2 combustion promoter — a catalyst additive used in fluid catalytic cracking (FCC) units at petroleum refineries to convert carbon monoxide emissions into carbon dioxide, improving combustion efficiency and reducing regulated emissions. The patent’s issuance reflects a narrowed but defensible claim scope in a technically mature field where compositional and process distinctions between competing products are often subtle.
FCC combustion promoters represent a commercially concentrated niche: a small number of speciality chemical companies — including W. R. Grace — supply the global refining industry. A valid, enforceable patent in this space could theoretically command significant licensing revenue or block a competitor’s product line entirely. The court’s judgment for Grace suggests either that Grace’s formulation falls outside the asserted claim scope, or that the claims themselves were otherwise unenforceable — either outcome has material implications for how aggressively related continuation patents can be asserted.
Should your refinery catalyst product be cleared against US11224864B2?
Any company formulating or supplying CO combustion promoters for FCC applications — whether competing with Grace or offering alternative products to refiners — should conduct a freedom-to-operate assessment against US11224864B2. Although Grace prevailed in this case, the patent remains in force. The specific claim construction adopted by the Maryland court may not be binding in a future action against a different defendant with a different product, particularly if the factual record differs.
PatSnap Eureka’s FTO Search Agent can map the claim language of US11224864B2 against your product’s compositional and process parameters, identify relevant prior art that informed the prosecution history, and flag related continuation applications that GWA or associated entities may assert next. For R&D teams developing next-generation combustion promoters, Eureka’s landscape analysis identifies the whitespace around the asserted claims — supporting design-around strategies before a product reaches market.
Run a freedom-to-operate analysis on US11224864B2 to assess your product’s exposure
Run FTO in Eureka →Similar patent infringement cases in refining catalyst and specialty chemicals
Explore other FCC catalyst and specialty chemicals patent disputes litigated in Maryland and neighbouring federal districts, including comparable combustion promoter and refining additive cases.
What this case signals for the refining catalyst IP landscape
A clean merits win for Grace in a specialist catalyst patent case carries implications well beyond this single dispute.
Patent-holding entities face high bar in technical catalyst infringement cases
The Maryland District Court’s merits judgment for Grace suggests the asserted claims of US11224864B2 did not map onto Grace’s commercial products under proper claim construction. Companies operating in the FCC catalyst space should monitor how courts interpret combustion promoter claims — particularly functional vs. compositional claim language — in future disputes.
Grace’s refining catalyst business carries no injunction risk from this patent
With the court denying both injunctive relief and monetary damages, Grace’s CO combustion promoter products are now judicially cleared in this proceeding. Refinery operators and Grace customers can take note that this specific patent assertion has been fully litigated and resolved in Grace’s favour at the district court level.
G. v W. — key questions answered
W. R. Grace & Co.-Conn. won. The Maryland District Court entered judgment for Grace on all counts of plaintiffs’ amended complaint. G. W. Aru and Cochise Technology’s motions for permanent injunction and monetary judgment were denied, and the case was closed on 19 August 2025.
The plaintiffs asserted US11224864B2 (application no. US17/176222), a patent covering CO-to-CO2 combustion promoter technology used in fluid catalytic cracking units at petroleum refineries. The patent was asserted against Grace’s commercial combustion promoter products.
It means the court adjudicated the substance of the plaintiff’s infringement claims and found them insufficient to establish liability — this is not a procedural dismissal. The patent holder cannot re-litigate the same infringement claims against the same defendant in a new action. The plaintiff’s only recourse is a Federal Circuit appeal.
When a defendant wins a full merits judgment, the court often dismisses the defendant’s counterclaims (typically invalidity or non-infringement declarations) as moot — because the plaintiff’s defeat renders those claims practically unnecessary. It does not mean Grace’s counterclaim positions were rejected on the merits.
The judgment binds only the parties to this case — G. W. Aru and Cochise Technology remain free to assert US11224864B2 against other defendants. However, any claim construction rulings and factual findings in this case may be persuasive (though not binding) in future proceedings, and defendants in new actions will likely cite the Maryland record.
PatSnap Eureka searches patents and litigation data to answer instantly.