Iridescence LLC v. Amazon.com — Power Control Patent Dismissed With Prejudice
Iridescence LLC asserted US8666560B2, a power control system and method patent, against Amazon.com in the Eastern District of Texas before Judge Rodney Gilstrap. The case closed with prejudice just 75 days after filing, with each party bearing its own costs — a resolution that forecloses any re-filing of the same claims against Amazon.
75-Day E.D. Texas Infringement Action Ends With Permanent Bar on Re-Filing
On October 1, 2025, Iridescence LLC filed a patent infringement action against Amazon.com, Inc. in the United States District Court for the Eastern District of Texas (Case No. 2:25-cv-00991), assigned to Judge Rodney Gilstrap. The sole patent in suit was US8666560B2 (application no. 13/872956), directed to a power control system and method. Iridescence was represented by Rabicoff Law LLC, a firm frequently associated with NPE enforcement campaigns, while Amazon retained Klarquist Sparkman LLP.
The case closed on December 15, 2025 — just 75 days after filing — when Iridescence filed a Notice of Voluntary Dismissal With Prejudice under Federal Rule of Civil Procedure 41(a)(1)(A)(i). Judge Gilstrap accepted and acknowledged the dismissal, ordered that all remaining claims be denied as moot, and directed each party to bear its own costs, attorneys’ fees, and expenses. Dismissal with prejudice operates as a final adjudication on the merits, permanently barring Iridescence from reasserting the same claims against Amazon.
A 75-day lifecycle is notably short even for quickly-settled NPE actions in the Eastern District of Texas. The public record is silent on whether a financial settlement accompanied the dismissal or whether Iridescence withdrew after encountering Amazon’s early defences. The absence of a fee-shifting order in favour of either party is consistent with a negotiated resolution but does not confirm one. What remains unknown is whether Iridescence continues to assert US8666560B2 against other defendants.
Filing to Voluntary dismissal in 75 days
75 days — well under the E.D. Texas median for patent cases, suggesting early resolution
Dismissed with prejudice: what the voluntary withdrawal means for both parties
FRCP 41(a)(1)(A)(i) dismissal permanently closes the case
A plaintiff may dismiss an action without a court order by filing a notice before the defendant serves an answer or a motion for summary judgment. When filed with prejudice, as here, it operates as a final judgment on the merits. Iridescence cannot re-file the same claims against Amazon in any federal court. The court accepted and acknowledged the dismissal rather than ruling on substance.
Rule 41 — final on meritsIridescence loses its right to re-assert these claims against Amazon
By dismissing with prejudice, Iridescence permanently surrendered its right to pursue Amazon under US8666560B2. The public record does not reveal whether a confidential settlement accompanied the withdrawal. However, US8666560B2 remains in force and Iridescence retains the ability to assert it against other parties — the dismissal binds only this defendant.
Patent survives; Amazon barred claimAmazon secures a permanent bar with no fee award — and no merits ruling
Amazon exits this litigation permanently without a formal finding of non-infringement or invalidity. That outcome avoids any adverse precedent but also means Amazon did not obtain a declaratory judgment it could wield against future assertion of US8666560B2 by another party. Each side bearing its own costs is standard for agreed dismissals and does not signal that Amazon sought or obtained exceptional-case fees.
No merits ruling; costs neutralPower control IP remains live — other defendants face continued exposure
US8666560B2 covers power control system and method technology relevant to smart devices, IoT infrastructure, and cloud hardware management. The swift, prejudiced dismissal against Amazon suggests the litigation risk to other companies in this space should be assessed independently. Companies deploying power management systems in connected or cloud environments that have not received a demand letter should still consider monitoring Iridescence’s enforcement activity.
Patent still enforceable vs. othersFull party and counsel information
| Role | Name | Type | Detail |
|---|---|---|---|
| Plaintiff | Iridescence LLC | Company | Patent assertion entity — holder of US8666560B2 (power control system and method)Search in Eureka ↗ |
| Defendant | Amazon.com, Inc. | Company | Amazon.com, Inc. — global e-commerce and cloud technology companySearch in Eureka ↗ |
| Plaintiff counsel | Isaac Phillip Rabicoff | Attorney | Counsel for Iridescence LLCSearch in Eureka ↗ |
| Plaintiff law firm | Rabicoff Law LLC | Law Firm | Representing Iridescence LLCSearch in Eureka ↗ |
| Defendant counsel | Klaus H. Hamm. | Attorney | Counsel for Amazon.com, Inc.Search in Eureka ↗ |
| Defendant law firm | Klarquist, Sparkman LLP | Law Firm | Representing Amazon.com, Inc.Search in Eureka ↗ |
| Presiding judge | Judge Rodney Gilstrap | Judge | Texas Eastern District CourtSearch in Eureka ↗ |
Official order — verbatim text
The court’s acceptance of the voluntary dismissal with prejudice under FRCP 41(a)(1)(A)(i) is a procedural disposition rather than a merits ruling — no infringement finding, no invalidity determination, and no claim-construction order were issued. The prejudice designation is critical: it forecloses any future action by Iridescence against Amazon on the same claims. The cost-neutrality order — each party bearing its own fees — is typical in agreed early withdrawals and does not indicate that either side sought exceptional-case fee shifting under 35 U.S.C. § 285.
US8666560B2 — Power Control System and Method
US8666560B2 is a granted US utility patent filed under application number 13/872956, directed to a power control system and method. Patents in this category typically cover automated management of electrical power delivery, load balancing, and control logic in systems ranging from consumer electronics to industrial and data-centre infrastructure. The patent’s grant number format (B2) indicates it issued after an examination with at least one office-action exchange, suggesting the claims were narrowed during prosecution.
Power control technology sits at the intersection of IoT device management, smart-grid systems, and cloud data-centre operations — all high-value commercial spaces where Amazon operates at scale. Assertion of this patent against Amazon’s infrastructure or device ecosystem (e.g., Alexa-enabled devices, AWS hardware) is consistent with NPE enforcement targeting large-platform operators. Companies deploying power management or load-control features in connected products face potential exposure and should evaluate their design-arounds relative to the issued claims.
Should you run an FTO analysis against US8666560B2?
Any company developing or deploying power control systems, smart-device power management, or data-centre load management should assess freedom to operate against US8666560B2. The Iridescence v. Amazon filing signals active enforcement of this patent, and the with-prejudice dismissal of the Amazon action means Iridescence retains full standing to pursue other defendants. Product teams integrating automated power distribution or demand-response control logic are particularly exposed.
PatSnap Eureka’s FTO Search Agent enables R&D and IP teams to map the claims of US8666560B2 against their product specifications, identify prosecution history disclaimers that narrow scope, and surface continuation patents in the 13/872956 family that may carry broader claims. Eureka’s landscape tools also allow teams to benchmark their designs against cited prior art and generate documented FTO opinions — reducing litigation risk before a demand letter arrives.
Run a freedom-to-operate analysis on US8666560B2 to assess your product’s exposure
Run FTO in Eureka →Similar Power Control & IoT Patent Cases in E.D. Texas
Explore related patent infringement actions involving power control, IoT, and smart-device technologies filed in the Eastern District of Texas before Judge Gilstrap.
What this case signals for the power control IP enforcement landscape
A 75-day NPE action dismissed with prejudice in E.D. Texas raises questions about litigation strategy, patent scope, and third-party exposure.
Early voluntary dismissals with prejudice often follow Amazon’s robust prior-art defence
Amazon employs a well-resourced early-stage defence strategy — including IPR petitioning, claim-construction challenges, and § 101 motions — that frequently induces NPE plaintiffs to withdraw before substantive briefing. The 75-day timeline here is consistent with a plaintiff reassessing litigation economics after receiving Amazon’s initial defensive posture.
US8666560B2 remains live against other defendants despite the Amazon dismissal
The with-prejudice dismissal binds only Iridescence vis-à-vis Amazon. Companies in the power control, smart-device, and IoT sectors that have not yet been targeted should treat this case as a signal to audit their exposure to US8666560B2 and map competing claims before a demand arrives.
Iridescence v Amazon.com — key questions answered
The dismissal with prejudice under FRCP 41(a)(1)(A)(i) means Iridescence LLC permanently relinquished its right to sue Amazon.com on the claims asserted under US8666560B2. The court accepted this as a final disposition. Amazon obtained a permanent bar to re-litigation, though no invalidity or non-infringement ruling was entered on the merits.
Yes. The with-prejudice dismissal binds only Iridescence and Amazon. US8666560B2 remains a granted, enforceable US patent. Iridescence retains full rights to assert it against other parties, making it relevant for any company operating in power control, IoT, or smart-device power management technology spaces.
The public record does not disclose the reason. Possibilities include a confidential settlement, a reassessment of litigation economics following Amazon’s early defence strategy, concerns about claim validity or scope, or a strategic decision to pursue other defendants. The absence of a fee-shifting award to either party is consistent with but does not confirm a negotiated resolution.
The court’s order that each party bear its own costs, expenses, and attorneys’ fees is standard in agreed voluntary dismissals. It indicates that Amazon did not seek — or did not obtain — exceptional-case fee shifting under 35 U.S.C. § 285, and Iridescence was not sanctioned. It does not indicate the financial terms of any private settlement that may have accompanied the dismissal.
Judge Rodney Gilstrap of the Eastern District of Texas (Marshall Division) presided. Judge Gilstrap is widely regarded as one of the most experienced patent trial judges in the United States and has presided over a significant share of US patent litigation. Cases before him are typically managed with structured schedules, making early resolution through dismissal even more notable.
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