Power Density Solutions v. Google: Liquid Cooling Patent Dispute Ends in Dismissal
What would you like to do next?
Choose your path based on your current needs:
📋 Case Summary
| Case Name | Power Density Solutions, LLC v. Google, LLC |
| Case Number | 3:24-cv-02122 |
| Court | California Southern District Court |
| Duration | Nov 2024 – Feb 2026 1 year 3 months |
| Outcome | Defendant Win — Dismissal with Prejudice |
| Patent at Issue | |
| Accused Products | Google TPUv3 Server Motherboards |
Case Overview
The Parties
⚖️ Plaintiff
A patent holding entity whose portfolio centers on thermal and power management technologies relevant to high-performance computing environments.
🛡️ Defendant
Leading global technology company, whose custom-designed Tensor Processing Units (TPU) form the backbone of its AI infrastructure.
Patent at Issue
This dispute centered on a single patent covering fundamental thermal management technology for high-density computing systems, specifically liquid cooling systems for high-density server and computing hardware. The patent protects ornamental appearance rather than functional technology.
- • US6552901B2 — Liquid cooling systems using tubing connected to chip heat sinks
Designing a similar liquid cooling product?
Check if your thermal management design might infringe this or related patents before launch.
The Verdict & Legal Analysis
Outcome
On February 24, 2026, both parties filed a Joint Motion of Dismissal pursuant to Federal Rule of Civil Procedure 41(a)(1)(A)(ii). The California Southern District Court accepted the motion, confirming that such stipulated dismissals are effective upon filing without requiring affirmative court approval. The case was dismissed with prejudice in its entirety, with each party bearing its own attorneys’ fees and costs.
Legal Significance
The dismissal with prejudice — as opposed to without prejudice — is legally significant. A with-prejudice dismissal bars Power Density Solutions from re-filing the same infringement claims against Google based on US6552901B2. This finality strongly suggests the parties reached a private resolution, whether through a licensing agreement, a covenant not to sue, or another negotiated arrangement. The mutual cost-bearing provision is a standard feature of negotiated patent settlements and further supports this interpretation.
Because the case terminated before any judicial ruling on claim construction, validity, or infringement, no published legal analysis exists from the court on the merits of the ‘901 patent’s claims as applied to Google’s TPUv3 architecture. This absence of merits rulings limits the case’s direct precedential value but does not diminish its strategic instructiveness.
Freedom to Operate (FTO) Analysis
This case highlights critical IP risks in liquid cooling technology for AI hardware. Choose your next step:
📋 Understand This Case’s Impact
Learn about the specific risks and implications from this litigation in thermal management.
- View all related patents in the liquid cooling space
- See which companies are most active in thermal management patents
- Understand patent claim patterns for liquid cooling systems
🔍 Check My Product’s Risk
Run a comprehensive FTO analysis for your own liquid cooling technology or product.
- Input your product description or technical features
- AI identifies potentially blocking thermal management patents
- Get actionable risk assessment report
High Risk Area
Tubing-to-heat-sink liquid cooling designs
1 Patent at Issue
Key thermal management patent
Active Enforcement
In AI data center liquid cooling
✅ Key Takeaways
Dismissal with prejudice under Rule 41(a)(1)(A)(ii) signals likely private resolution; monitor for licensing terms in subsequent SEC disclosures or public filings.
Search related case law →NPE enforcement against hyperscaler AI hardware is an active and growing litigation segment.
Explore NPE strategies →Frequently Asked Questions
The case involved U.S. Patent No. US6552901B2 (Application No. US09/974335), covering liquid cooling systems using tubing connected to chip heat sinks in server motherboard architectures.
The parties filed a joint stipulation of dismissal under Rule 41(a)(1)(A)(ii). A with-prejudice dismissal prevents Power Density Solutions from reasserting the same claims, suggesting a private settlement or licensing resolution was reached.
It reinforces the viability of NPE enforcement against AI infrastructure hardware and signals that thermal management patents — even older ones — retain assertion value as liquid cooling adoption accelerates in data centers.
Ready to Strengthen Your Patent Strategy?
Join 18,000+ IP professionals using PatSnap Eureka to conduct prior art searches, draft patents, and analyse competitive landscapes with AI-powered precision.
References
- United States District Court, Southern District of California — Case 3:24-cv-02122
- U.S. Patent and Trademark Office — US6552901B2
- Weeks Nelson (Plaintiff’s Counsel)
- Paul Hastings, LLP (Defendant’s Counsel)
- PatSnap — IP Intelligence Solutions for Law Firms
This article is for informational purposes only and does not constitute legal advice. All case information is drawn from publicly available court records. For platform capabilities, visit PatSnap.