Valtrus Innovations Ltd v. Evodc LLC

I. Executive Summary and Procedural Information

• Parties & Counsel:
  • Plaintiff: Valtrus Innovations, Ltd. (Ireland) and Key Patent Innovations, Ltd. (Ireland)
  • Defendant: EvoDC, LLC (California)
  • Plaintiff's Counsel: Reichman Jorgensen Lehman & Feldberg LLP; Findlay Craft, P.C.
• Case Identification: 2:26-cv-00286, E.D. Tex., 04/09/2026
• Venue Allegations: Venue is alleged to be proper in the Eastern District of Texas because Defendant EvoDC, LLC operates two data centers (DAL1 and DAL6 in Plano, TX) within the district, which Plaintiffs assert constitute a regular and established place of business where acts of infringement have occurred.
• Core Dispute: Plaintiffs allege that Defendant's methods for cooling its data centers, which use equipment from third-party suppliers, infringe two expired patents related to energy-efficient data center cooling and control systems.
• Technical Context: The patents address methods for dynamically managing the significant energy consumption of data center cooling systems by adjusting cooling output in response to real-time, distributed thermal loads.
• Key Procedural History: The complaint alleges Plaintiffs sent a letter to Defendant on January 13, 2025, providing notice of the asserted patents and including claim charts, to which Defendant did not respond. Plaintiffs also note pending litigation with Vertiv Corporation, a supplier of cooling equipment to Defendant. Both patents-in-suit are expired, limiting the available remedy to past damages.

Case Timeline

Date	Event
2001-10-05	Earliest Priority Date for U.S. Patent No. 6,868,682
2002-08-02	Earliest Priority Date for U.S. Patent No. 6,854,287
2005-02-15	U.S. Patent No. 6,854,287 Issued
2005-03-22	U.S. Patent No. 6,868,682 Issued
2025-01-13	Plaintiffs allegedly sent pre-suit notice letter to Defendant
2026-04-09	Complaint Filed

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

U.S. Patent No. 6,854,287 - "Cooling System"

The Invention Explained

• Problem Addressed: The patent's background describes the inefficiency of conventional data center cooling systems, which typically operate at or near maximum capacity as a "worst-case scenario," even when the actual heat load from computer equipment is significantly lower, resulting in substantial wasted energy '287 Patent, col. 2:10-29
• The Patented Solution: The invention is a method for cooling a data center that moves beyond simple on/off or maximum-power operation ('287 Patent, background). It uses a plurality of heat exchanger units (HEUs) and sensors placed at various locations within the room '287 Patent, col. 2:35-43 The system responsively controls two key variables: the temperature of the cooling fluid supplied to the HEUs and the air delivery to the room, which is achieved by "individually manipulating a mass flow rate of the cooling fluid supplied to each" HEU '287 Patent, abstract '287 Patent, claim 1 This allows for a granular, demand-based cooling approach tailored to the specific, localized needs of different server racks.
• Technical Importance: This approach represented a shift from brute-force, facility-wide cooling to a more intelligent, zoned methodology, aiming to reduce the significant operating expenses associated with data center power consumption '287 Patent, col. 1:45-62

Key Claims at a Glance

• The complaint asserts infringement of at least independent claim 1 '287 Patent, claim 1 Compl. ¶26
• Essential Elements of Claim 1:
  • A method for cooling a room containing computer systems.
  • Providing a plurality of heat exchanger units (HEUs) to receive air from and deliver cooled air to the room.
  • Supplying the HEUs 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 and the air delivery in response to the sensed temperatures.
  • The control of air delivery includes "individually manipulating a mass flow rate of the cooling fluid supplied to each of the plurality of heat exchanger units."
• The complaint refers to claim charts in exhibits that assert infringement of claim 1 Compl. ¶26

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

The Invention Explained

• Problem Addressed: The patent identifies a similar problem to the '287 Patent: conventional systems are inefficient because they do not vary cooling output based on the distributed needs of the data center '682 Patent, col. 2:11-15 It further specifies that conventional sensors are often located at the main cooling unit, not at the actual heat-producing equipment racks, leading to inaccurate and inefficient control '682 Patent, col. 2:20-25
• The Patented Solution: The patent proposes a hierarchical, "agent-based" software control method for managing cooling '682 Patent, abstract A "first agent" (e.g., a "rack agent") monitors a local subsystem and makes local adjustments (e.g., adjusting a vent tile) '682 Patent, col. 13:42-45 '682 Patent, col. 14:29-37 If the local agent cannot resolve a temperature deviation, it "requests" assistance from a "second agent" (e.g., a "row agent") in the hierarchy, which can redistribute cooling resources from a wider area '682 Patent, abstract '682 Patent, col. 14:46-51 A third, higher-level agent (e.g., a "CRAC agent") can be called upon to change the overall output of the main cooling system if the lower-level agents' actions are insufficient '682 Patent, col. 15:13-27
• Technical Importance: This distributed intelligence model allows for scalable and more responsive energy management, escalating control actions from the most local and efficient level up to more energy-intensive, facility-wide changes only when necessary '682 Patent, col. 3:11-24

Key Claims at a Glance

• The complaint asserts infringement of at least independent claim 1 '682 Patent, claim 1 Compl. ¶29
• Essential Elements of Claim 1:
  • A method for controlling temperature in a data center.
  • Receiving sensory data from a subsystem.
  • Processing the data with a "first agent in a hierarchy of agents" to determine if temperature is within a predetermined range.
  • Adjusting a cooling fluid delivery rate using the first agent to maintain the temperature range.
  • "Requesting a second agent from the hierarchy of agents" to process the data when the first agent cannot maintain the temperature range on its own, triggering the second agent to "redistribute" the cooling fluid.
• The complaint refers to claim charts in exhibits that assert infringement of claim 1 Compl. ¶29

III. The Accused Instrumentality

Product Identification

• The accused instrumentalities are the data center cooling methods performed by Defendant EvoDC at its facilities, including at its DAL1 and DAL6 locations in Texas Compl. ¶¶12-15 The methods are carried out using cooling equipment from various suppliers, including Vertiv Corporation and Trane Compl. ¶¶16, 18

Functionality and Market Context

• The complaint alleges that EvoDC utilizes "high-efficiency precision cooling systems," such as the Liebert DSE 85, to cool its data centers Compl. ¶16
• A press release excerpt included in the complaint states these systems "utilize a pumped refrigerant economizer that varies cooling and airflow in translation to data center workload requirements" Compl. p. 4 This description of varying cooling and airflow based on workload is central to the infringement allegations.
• The complaint provides visual evidence, including a screenshot from a press release describing the installation of new Liebert DSE 85 cooling systems at an EvoDC facility Compl. p. 4
• Further visual evidence includes a still image from a video tour of an EvoDC facility showing cooling equipment, and a photograph from EvoDC's website depicting a Trane cooling unit at another facility Compl. p. 5
• The complaint positions EvoDC as a significant data center operator with 13 facilities across the United States Compl. ¶15

IV. Analysis of Infringement Allegations

The complaint references exemplary claim charts attached as exhibits, but these exhibits were not provided with the filed complaint. The following analysis is based on the narrative allegations.

'287 Patent Infringement Allegations
The complaint alleges that EvoDC's methods of cooling its data centers infringe at least claim 1 of the '287 Patent Compl. ¶26 The core of this allegation appears to be that EvoDC's systems, such as those from Vertiv, sense temperatures within the data center and responsively vary both cooling and airflow to meet localized workload requirements Compl. p. 4 This functionality is alleged to meet the claim elements of sensing temperatures and controlling both fluid temperature and air delivery in response.

'682 Patent Infringement Allegations
The complaint alleges that EvoDC's cooling methods also infringe at least claim 1 of the '682 Patent Compl. ¶29 The theory here would be that the control software used by EvoDC's cooling systems operates in a hierarchical manner that maps onto the claimed "agent-based" structure. Plaintiffs would need to show that a local controller (the "first agent") attempts to manage temperature first, and upon failure, a higher-level system controller (the "second agent") is triggered to redistribute cooling resources.

• Identified Points of Contention:
  • Scope Questions ('287 Patent): A likely point of dispute will be the claim limitation requiring "individually manipulating a mass flow rate of the cooling fluid supplied to each of the plurality of heat exchanger units." The case may turn on whether EvoDC's systems provide this level of granular, unit-by-unit control, or whether they employ a less granular zone-based control that may not satisfy the "individually" and "each" requirements.
  • Technical Questions ('682 Patent): The central dispute will likely involve claim construction and factual mapping of the terms "first agent," "second agent," and "requesting." The question will be whether the accused system's standard control logic, which may involve escalating alarms or triggering different control loops, performs the specific function of a lower-level "agent" making a "request" to a higher-level "agent" that then "redistributes" cooling, as claimed in the patent.

V. Key Claim Terms for Construction

• The Term: "individually manipulating" (from '287 Patent, claim 1)

• Context and Importance: This term is critical to defining the required granularity of control. Its construction will determine whether systems with zone-level or other aggregated controls infringe, or if the claim requires discrete control over the cooling fluid supplied to every single heat exchanger unit. Practitioners may focus on this term because it distinguishes the claimed invention from cruder, less-differentiated cooling control methods.

• Intrinsic Evidence for Interpretation:

  • Evidence for a Broader Interpretation: The specification discusses controlling HEUs "according to their anticipated heat loads" and notes that a "plurality of HEU's 22 may be positioned to cool a single rack," which may suggest that "individually" could refer to the control of a logical group or zone of units rather than a single physical unit '287 Patent, col. 4:1-4 '287 Patent, col. 4:59-60
  • Evidence for a Narrower Interpretation: Claim 1 explicitly requires manipulating the flow "supplied to each of the plurality of heat exchanger units," which strongly suggests discrete control. The specification also describes using valves to "enable control of cooling fluid flow through respective fluid lines," reinforcing the idea of per-unit control '287 Patent, col. 8:38-40

• The Term: "requesting a second agent from the hierarchy" (from '682 Patent, claim 1)

• Context and Importance: This term defines the specific interaction model between the hierarchical control levels. The infringement analysis will depend on whether a standard system alert, an exceeded threshold trigger, or an automated escalation protocol in the accused systems can be considered a "request" from a "first agent" to a "second agent." This term is key to distinguishing the claimed method from any generic multi-level control system.

• Intrinsic Evidence for Interpretation:

  • Evidence for a Broader Interpretation: The specification describes the interaction abstractly, stating the "rack agent communicates with its associated row agent" when it cannot meet objectives, which could encompass a variety of automated system interactions beyond a formal, explicit "request" '682 Patent, col. 14:46-48
  • Evidence for a Narrower Interpretation: The patent's abstract and summary consistently frame the invention around a specific sequence: a first agent tries, fails, and then "requests" a second agent to "redistribute" cooling fluid '682 Patent, abstract This structured, sequential escalation may be argued to require more than a simple threshold-triggered event, but a specific protocol where one control entity actively summons another.

VI. Other Allegations

• Indirect Infringement: The complaint does not contain separate counts for indirect infringement. The allegations are centered on direct infringement by Defendant for "performing methods of cooling" Compl. ¶26 Compl. ¶29
• Willful Infringement: The complaint lays a foundation for willfulness by alleging that Plaintiffs provided Defendant with pre-suit notice of the asserted patents via a letter on January 13, 2025, which allegedly included claim charts Compl. ¶21 Defendant's alleged failure to respond to this letter could be used to argue for post-notice willful infringement. The prayer for relief seeks enhanced damages and a finding that the case is "exceptional" Compl. Prayer for Relief B, D

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

This dispute over expired patents will focus entirely on whether past activities constituted infringement, with the central issues likely being:

1. A core issue will be one of functional mapping: Can the operational logic of Defendant's modern, off-the-shelf data center management software be mapped onto the specific, hierarchical "agent-based" and "requesting" command structure claimed in the '682 Patent, or is this an attempt to apply a bespoke software architecture to a general-purpose control system?
2. A second key issue will be one of definitional scope: Does the term "individually manipulating," as used in the '287 Patent, require discrete, per-unit control over every heat exchanger, or can it be construed more broadly to cover the zone-based or system-level responsive controls allegedly used in Defendant's data centers?
3. An evidentiary question for damages and willfulness will be the effect of the January 2025 notice letter. The case will examine what actions, if any, Defendant took after receiving notice, which will be central to Plaintiffs' claim for enhanced damages.