MiBev v. A.O. Smith: Water Filtration Patent Dispute Dismissed

In a closely watched water filtration patent dispute, MiBev Creations, LLC’s infringement claims against A.O. Smith Water Treatment (North America), Inc. ended not with a verdict, but with a stipulated dismissal — a result that carries significant strategic lessons for IP practitioners and R&D teams navigating crowded consumer water treatment markets.

Filed April 9, 2024, in the Western District of Texas and closed March 14, 2025, the case centered on U.S. Patent No. 11,235,267B1, a utility patent covering water treatment technology. The accused product — A.O. Smith’s Aquasana Clean Water Machine — represents a high-visibility consumer filtration product with substantial market presence.

The case’s resolution, dismissal of plaintiff’s claims with prejudice and defendant’s counterclaims without prejudice, signals a nuanced endgame that warrants careful analysis. For patent attorneys, the asymmetric dismissal structure itself tells a story. For in-house IP counsel and R&D teams operating in the water treatment technology sector, this case is a critical data point in understanding patent assertion strategy and litigation risk. Water filtration patent infringement litigation.

Case Overview

The Parties

The Patent at Issue

This case centered on a utility patent covering water treatment technology:

• • US 11,235,267B1 — A utility patent covering water treatment and purification systems.

The Verdict & Legal Analysis

Outcome

The court granted the parties’ Stipulation to Dismiss in its entirety on March 14, 2025. The operative terms of the dismissal are strategically significant:

• MiBev’s infringement claims under U.S. Patent No. 11,235,267B1 were dismissed WITH PREJUDICE — MiBev cannot refile these specific claims against A.O. Smith.
• A.O. Smith’s counterclaims of non-infringement and invalidity were dismissed WITHOUT PREJUDICE — A.O. Smith retains the ability to reassert these defenses in future proceedings.
• Each party bears its own attorneys’ fees, costs, and expenses — no fee-shifting under 35 U.S.C. § 285 was ordered or agreed upon.

No damages award, royalty determination, or injunctive relief was disclosed. The specific financial terms of any underlying settlement between the parties, if any, were not made part of the public record.

Verdict Cause Analysis

The case was initiated as a straightforward infringement action. However, the rapid progression to stipulated dismissal — without a contested claim construction or substantive dispositive motion practice — suggests one of several likely dynamics:

1. Pre-suit due diligence gaps: Early claim mapping may have revealed infringement theories weaker than initially assessed upon deeper discovery or defendant’s technical disclosures.
2. Validity risk to the asserted patent: A.O. Smith’s counterclaims of invalidity were preserved (dismissed without prejudice), suggesting the defendant had developed, or was developing, a credible invalidity challenge. The plaintiff’s willingness to dismiss with prejudice may reflect a strategic decision to avoid an adverse invalidity ruling on U.S. Patent No. 11,235,267B1 that could damage the patent’s value against third parties.
3. Commercial settlement: A confidential licensing agreement or lump-sum payment could underlie the dismissal, with the procedural structure simply reflecting standard settlement mechanics.

Legal Significance

The asymmetric dismissal structure — plaintiff’s claims dismissed with prejudice, defendant’s counterclaims dismissed without prejudice — is a standard but instructive pattern in settled patent disputes. It protects the defendant’s invalidity arguments for future assertion while foreclosing the plaintiff’s ability to re-litigate the same claims. Practitioners should note this structure does not constitute a ruling on the merits of infringement or validity.

For water treatment technology patent litigation, this case does not establish binding precedent, but contributes to the body of resolved disputes in this sector.

Strategic Takeaways

For Patent Holders: A with-prejudice dismissal of your infringement claims forfeits those specific claims permanently against that defendant. Evaluate your claim mapping rigorously before filing. If invalidity risk to a core patent is high, early settlement preserving the patent’s validity (by avoiding adjudication) may be the optimal outcome. Consider whether a single-patent, single-product assertion strategy provides sufficient leverage in disputes involving well-resourced defendants with experienced IP litigation counsel.

For Accused Infringers: Securing dismissal of invalidity counterclaims without prejudice is a meaningful litigation achievement — it preserves future optionality including potential IPR petitions at the USPTO. Early engagement with plaintiff’s claim mapping, combined with credible invalidity contentions, can accelerate resolution on favorable terms.

For R&D Teams: The Aquasana Clean Water Machine’s involvement underscores that commercially successful, market-leading consumer products remain priority targets for patent assertion. Freedom-to-operate (FTO) analyses for water filtration products should include review of issued patents in the US16/905,640 application family.