Valtrus Innovations Ltd v. Prime Data Centers LLC

I. Executive Summary and Procedural Information

• Case Name: Valtrus Innovations Ltd. v. Prime Data Centers, LLC
• Parties & Counsel:
  • Plaintiff: Valtrus Innovations Ltd. and Key Patent Innovations Ltd. (Ireland)
  • Defendant: Prime Data Centers, LLC (Delaware)
  • Plaintiff's Counsel: Reichman Jorgensen Lehman & Feldberg LLP
• Case Identification: 1:26-cv-03958, N.D. Ill., 04/09/2026
• Venue Allegations: Plaintiff alleges venue is proper in the Northern District of Illinois because Defendant operates a regular and established place of business, its ORD01 data center campus, within the district where acts of infringement have allegedly occurred.
• Core Dispute: Plaintiff alleges that Defendant's data centers utilize cooling methods that infringe two patents related to energy-efficient, responsive cooling systems.
• Technical Context: The technology addresses the significant energy consumption of data center cooling systems by dynamically adjusting cooling output based on real-time thermal needs rather than operating at a constant maximum capacity.
• Key Procedural History: The complaint alleges that Plaintiff provided Defendant with pre-suit notice of infringement on January 9, 2025, which included claim charts for the asserted patents. The complaint also references separate, ongoing litigation between Plaintiff and Vertiv Corporation, a supplier of cooling equipment allegedly used by Defendant. Both asserted patents are expired, and the suit seeks only past damages.

Case Timeline

Date	Event
2002-08-02	U.S. Patent No. 6,854,287 Priority Date
2003-01-16	U.S. Patent No. 6,868,682 Priority Date
2005-02-15	U.S. Patent No. 6,854,287 Issued
2005-03-22	U.S. Patent No. 6,868,682 Issued
2024-01-01	Plaintiff's attempts to resolve with supplier Vertiv begin
2025-01-09	Plaintiff sends pre-suit notice letter to Defendant Prime
2026-02-05	Plaintiff sends final resolution request to Vertiv
2026-04-09	Complaint Filing Date

II. Technology and Patent(s)-in-Suit Analysis

U.S. Patent No. 6,854,287 - Cooling system

• Patent Identification: U.S. Patent No. 6854287, "Cooling system", issued February 15, 2005 (the "'287 Patent").

The Invention Explained

• Problem Addressed: The patent describes conventional data center cooling systems as highly inefficient because they are designed for worst-case scenarios and operate at or near maximum power even when the actual heat load is low, resulting in unnecessarily high operating expenses '287 Patent, col. 2:11-29
• The Patented Solution: The invention is a cooling system that uses sensors to measure temperatures at various locations within a data center room '287 Patent, col. 2:40-41 Based on these real-time temperature readings, the system dynamically controls either the temperature of the cooling fluid or the delivery of cooled air to the computer systems, for example by adjusting the flow rate to individual heat exchanger units '287 Patent, abstract '287 Patent, col. 4:56-63 This creates a demand-based cooling approach instead of a static, maximum-output one.
• Technical Importance: The invention provided a method to significantly reduce data center energy consumption by matching cooling output to the actual, fluctuating thermal loads of computer equipment.

Key Claims at a Glance

• The complaint asserts independent claim 1 of the '287 Patent Compl. ¶24
• Essential elements of claim 1 include:
  • Providing a plurality of heat exchanger units to receive air from a room and deliver cooled air back to the room.
  • Supplying the heat exchanger units with cooling fluid from an air conditioning unit.
  • Sensing temperatures at one or more locations in the room.
  • Controlling at least one of the cooling fluid temperature or the air delivery in response to the sensed temperatures.
  • Wherein controlling the air delivery comprises "individually manipulating a mass flow rate of the cooling fluid supplied to each of the plurality of heat exchanger units."
• The complaint references exemplary claim charts in exhibits that were not filed with the complaint Compl. ¶24

U.S. Patent No. 6,868,682 - Agent Based Control Method and System for Energy Management

• Patent Identification: U.S. Patent No. 6868682, "Agent Based Control Method and System for Energy Management", issued March 22, 2005 (the "'682 Patent").

The Invention Explained

• Problem Addressed: The patent identifies the same inefficiency problem as the '287 Patent, noting that conventional systems do not vary cooling output based on the distributed needs of the data center and often measure temperature only at the main air conditioning unit, not at the heat-producing server racks '682 Patent, col. 2:11-29
• The Patented Solution: The invention proposes a hierarchical, agent-based control method '682 Patent, abstract A "first agent" (e.g., a local controller for a server rack) processes local temperature data and adjusts cooling delivery. If the local agent cannot maintain the target temperature, it can "request" a "second agent" higher in the hierarchy (e.g., a controller for a row of racks or the main cooling unit) to redistribute or increase the overall cooling resources '682 Patent, abstract '682 Patent, col. 15:10-14 Figure 4 illustrates this hierarchy with "Rack Agents," "Row Agents," and "CRAC Agents" '682 Patent, Fig. 4
• Technical Importance: The invention applies principles of distributed, intelligent software control to data center thermal management, allowing for more granular, scalable, and responsive energy use.

Key Claims at a Glance

• The complaint asserts independent claim 1 of the '682 Patent Compl. ¶27
• Essential elements of claim 1 include:
  • Receiving sensory data corresponding to a temperature from a subsystem in a data center.
  • Processing the sensory data by a "first agent in a hierarchy of agents" to determine if the temperature is within a predetermined range.
  • Adjusting a delivery rate for a cooling fluid using the first agent.
  • "Requesting a second agent from the hierarchy of agents" to process the data when the first agent cannot maintain the temperature, unless the second agent redistributes the cooling fluid.
• The complaint references exemplary claim charts in exhibits that were not filed with the complaint Compl. ¶27

III. The Accused Instrumentality

Product Identification

• The methods of cooling performed in Defendant Prime's data centers Compl. ¶24 Compl. ¶27

Functionality and Market Context

• The complaint alleges that Prime uses cooling equipment from various suppliers, specifically identifying Vertiv Corporation, to perform the infringing cooling methods Compl. ¶16 It also suggests equipment from Stulz, Trane, DataAire, and Schneider Electric may be used Compl. ¶17
• The complaint provides visual evidence from an online tour of a Prime facility, showing Vertiv-branded cooling units in operation. A screenshot from a video shows multiple cooling units, identified as Vertiv DSE-1RQ models, within a data hall Compl. ¶16
• The complaint alleges that Prime operates 29 data centers across 14 campuses globally, positioning it as a significant operator in the data center market Compl. ¶15

IV. Analysis of Infringement Allegations

The complaint references claim-chart exhibits that were not provided. The infringement theory is therefore summarized from the complaint's narrative allegations.

'287 Patent Infringement Allegations

The complaint alleges that Prime directly infringes the '287 Patent by "performing methods of cooling its data centers" Compl. ¶24 The theory suggests that the cooling systems used by Prime, such as those from Vertiv, are configured to sense temperatures within the data centers and responsively control air delivery Compl. ¶23-24 The core of the allegation is that these systems meet the claim 1 limitation of "individually manipulating a mass flow rate of the cooling fluid supplied to each of the plurality of heat exchanger units" '287 Patent, col. 14:30-35

'682 Patent Infringement Allegations

The complaint alleges that Prime's cooling methods infringe the '682 Patent by controlling temperature "based on sensory data" Compl. ¶26 The implicit theory is that the control software and hardware within Prime's cooling equipment operate as the claimed "agent based control method" '682 Patent, title This suggests Prime's systems use a distributed, hierarchical logic where local controllers ("first agent") manage local conditions and escalate to higher-level controllers ("second agent") when necessary, as required by claim 1 '682 Patent, col. 18:21-34

Identified Points of Contention

• Scope Questions: A central issue for the '682 Patent will be whether the control architecture of the accused systems constitutes a "hierarchy of agents" as described in the patent. The analysis may focus on whether standard distributed control loops satisfy the specific "first agent" and "second agent" claim language, or if the patent requires a more specific, formally defined agent-based software architecture '682 Patent, Fig. 4
• Technical Questions: For the '287 Patent, a key factual question will be what evidence demonstrates that Prime's systems "individually" manipulate the coolant mass flow rate to "each" heat exchanger unit. The dispute may turn on whether the systems provide this granular level of independent control or merely make global adjustments to the entire cooling system.

V. Key Claim Terms for Construction

• The Term: "individually manipulating a mass flow rate" '287 Patent, claim 1
• Context and Importance: This term is central to the infringement analysis for the '287 Patent. The case will likely depend on whether the accused cooling systems perform this specific, granular control for each heat exchanger, as opposed to making system-wide adjustments.
• Intrinsic Evidence for Interpretation:
  • Evidence for a Broader Interpretation: The specification's objective is to supply cooling to racks "in accordance with their heat dissipation," which may suggest that any system capable of differential cooling meets the spirit of the invention '287 Patent, col. 4:67-68
  • Evidence for a Narrower Interpretation: Claim 9, which depends from claim 1, specifies manipulating the flow rate "in substantially independent manners with respect to each of the plurality of heat exchanger units" '287 Patent, col. 15:7-11 The specification also depicts distinct valves (40) and pumps (38) that appear to enable discrete control for different units, potentially limiting the term to systems with such specific hardware '287 Patent, Fig. 3
• The Term: "a first agent in a hierarchy of agents" and "requesting a second agent" '682 Patent, claim 1
• Context and Importance: These terms define the patented software control architecture. The infringement case for the '682 Patent hinges on whether the accused systems' control logic can be mapped onto this specific agent-based, hierarchical structure.
• Intrinsic Evidence for Interpretation:
  • Evidence for a Broader Interpretation: A plaintiff may argue the terms cover any distributed control system where a local controller's failure to resolve an issue automatically triggers an action by a central or regional controller.
  • Evidence for a Narrower Interpretation: The specification provides a detailed schematic of the hierarchy, distinguishing between "Rack Agents," "Row Agents," and "CRAC Agents," where agents at one level communicate and aggregate data for the next '682 Patent, Fig. 4 '682 Patent, col. 13:19-51 This detailed embodiment may support a narrower construction requiring a software architecture with these distinct, communicating hierarchical levels.

VI. Other Allegations

• Indirect Infringement: The complaint does not contain allegations of indirect infringement; it focuses on direct infringement through Prime's performance of cooling methods Compl. ¶24 Compl. ¶27
• Willful Infringement: The complaint does not use the word "willful," but it lays a factual basis that could support such a claim. It alleges that Prime had pre-suit knowledge of the patents and infringement as of January 9, 2025, via a letter that included "claim charts demonstrating infringement" Compl. ¶19 The prayer for relief also requests a finding that the case is "exceptional" under 35 U.S.C. § 285 Compl. ¶D, prayer for relief

VII. Analyst's Conclusion: Key Questions for the Case

The resolution of this dispute may depend on the court's interpretation of two central issues:

• A core issue will be one of definitional scope: Does the control software in the accused cooling systems implement the specific, multi-level "hierarchy of agents" described and claimed in the '682 patent, or does it utilize a more conventional control architecture that falls outside the claim's scope?
• A key evidentiary question will be one of functional proof: Can Plaintiff demonstrate that the accused systems in Prime's data centers perform the granular function of "individually manipulating a mass flow rate" of coolant to each heat exchanger unit as required by the '287 patent, or is the evidence limited to showing only global, system-wide adjustments?