Flash-Control v. Micron Technology: Federal Circuit Appeal Dismissed (Case 22-1914)
Flash-Control, LLC appealed against Micron Technology, Inc. at the Federal Circuit over eight patents spanning flash wear leveling, multilevel phase-change memory, and embedded fast read/write non-volatile memory systems. The appeal was dismissed by agreement under Fed. R. App. P. 42(b) after 324 days, with each side bearing its own costs.
Eight memory patents, one Federal Circuit dismissal by agreement
Flash-Control, LLC brought this appeal before the U.S. Court of Appeals for the Federal Circuit (Case No. 22-1914) against Micron Technology, Inc., a leading DRAM and NAND flash memory manufacturer. The dispute centred on eight U.S. patents — including US8817537B2, US7855916B2, US8194452B2, US7853749B2, US7254059B2, US9792219B2, US9257184B2, and US8531880B2 — covering technologies including flash drive fast wear leveling, multilevel phase-change memory elements, and non-volatile memory systems with embedded fast read and write capabilities. The underlying verdict cause was patentability, characterised as an invalidity/cancellation action.
The recorded basis of termination is 'Appeal Dismissed'. The docket order states that, the parties having so agreed, the proceeding is dismissed under Fed. R. App. P. 42(b), with each side bearing its own costs. The Federal Circuit issued no merits ruling on the patentability or validity of any of the eight asserted patents. The specific terms underlying the parties' agreement to dismiss are not disclosed in the available record.
The appeal ran for 324 days from filing on 21 June 2022 to closure on 11 May 2023. A consensual dismissal at the appellate stage — before any merits adjudication — suggests the parties reached some form of resolution, though the nature of that resolution is not disclosed in the public record. The absence of a cost award to either side may reflect an evenly negotiated exit, but this remains speculative given the limited public record.
See Complete Case & Patent Analysis →Filing to Appeal Dismissed in 324 days
324 days — from Federal Circuit filing to dismissal, spanning just under 11 months
US8817537B2 and 7 further patents — flash memory and non-volatile memory systems
Any company designing or commercialising flash memory controllers, NAND-based SSD firmware, phase-change memory (PCM) devices, or embedded non-volatile memory architectures with fast read/write capability should assess freedom-to-operate against this eight-patent portfolio. The patents span wear leveling algorithms, multilevel PCM element operation, and embedded fast-access NVM subsystems — technologies present in a wide range of consumer, enterprise, and automotive storage products. The Federal Circuit dismissal does not extinguish these patents.
Official order — verbatim text
The docket order records a consensual dismissal under Fed. R. App. P. 42(b), with each side bearing its own costs. The order issues no ruling on the patentability, validity, or infringement of any of the eight asserted flash and non-volatile memory patents. The phrase 'the parties having so agreed' confirms the dismissal is stipulated rather than unilaterally initiated, but the substance of any underlying agreement is not disclosed in the available record.
Appeal dismissed: what the Fed. R. App. P. 42(b) order means for both parties
Dismissal under Fed. R. App. P. 42(b): no merits ruling
Fed. R. App. P. 42(b) allows parties to voluntarily dismiss an appeal by agreement. The Federal Circuit here issued no ruling on the validity, patentability, or infringement of any of the eight asserted patents. The dismissal is procedural — it ends the appellate proceeding without adjudicating the underlying merits of the invalidity/cancellation action.
Procedural dismissalFlash-Control exits the appeal without a merits defeat
Flash-Control avoids an adverse Federal Circuit ruling on the validity of its eight memory patents. However, because no merits ruling was issued, the patents receive no judicial endorsement of their validity either. The underlying invalidity/cancellation findings from the proceeding below remain on the record. Flash-Control's ability to assert these patents in future proceedings depends on what occurred at the trial level, which is not fully disclosed in the available record.
No appellate vindicationMicron avoids Federal Circuit merits review
Micron Technology secures an end to this appellate proceeding without a Federal Circuit ruling that could have reinstated or modified any patent claims. Each side bearing its own costs means Micron recovers no attorney fees at the appellate level. The specific terms of the parties' agreement to dismiss are not disclosed in the available record.
Appeal ends, terms undisclosedFlash memory sector: validity questions remain open
With no Federal Circuit merits ruling, the validity of Flash-Control's eight patents covering wear leveling, phase-change memory, and embedded fast read/write architectures is not authoritatively settled at the appellate level. Competitors operating in the NAND flash and non-volatile memory space should note that the patents remain formally in existence and the underlying invalidity record has not been overturned by this proceeding.
Patent validity unsettledFull party and counsel information
| Role | Name | Type | Detail |
|---|---|---|---|
| Plaintiff | Flash-Control, LLC | Company | Flash memory patent assertion entity — holder of US8817537B2 and 7 related memory patentsSearch in Eureka ↗ |
| Defendant | Micron Technology, Inc. | Company | Micron Technology, Inc. — major U.S. semiconductor manufacturer specialising in NAND flash and DRAM memorySearch in Eureka ↗ |
| Plaintiff counsel | Derek Dahlgren | Attorney | Counsel for Flash-Control, LLCSearch in Eureka ↗ |
| Plaintiff counsel | James Michael Lennon | Attorney | Counsel for Flash-Control, LLCSearch in Eureka ↗ |
| Plaintiff counsel | Timothy Devlin | Attorney | Counsel for Flash-Control, LLCSearch in Eureka ↗ |
| Plaintiff law firm | Devlin Law Firm LLC | Law Firm | Representing Flash-Control, LLCSearch in Eureka ↗ |
| Defendant counsel | Elizabeth Moulton | Attorney | Counsel for Micron Technology, Inc.Search in Eureka ↗ |
| Defendant counsel | James Anglin Flynn | Attorney | Counsel for Micron Technology, Inc.Search in Eureka ↗ |
| Defendant counsel | Jared Bobrow, Esq. | Attorney | Counsel for Micron Technology, Inc.Search in Eureka ↗ |
| Defendant counsel | Jeremy Jason Lang | Attorney | Counsel for Micron Technology, Inc.Search in Eureka ↗ |
| Defendant law firm | Orrick Herrington & Sutcliffe LLP | Law Firm | Representing Micron Technology, Inc.Search in Eureka ↗ |
| Presiding judge | Judge N/A | Judge | Court of Appeals for the Federal CircuitSearch in Eureka ↗ |
R&D signals in the flash and non-volatile memory IP space
Forward-looking patent intelligence derived from Flash-Control's eight-patent NVM portfolio and Micron Technology's competitive IP posture in the NAND flash and phase-change memory sector.
Flash-Control's NVM portfolio spans a decade of incremental filings
Flash-Control's eight asserted patents, filed between 2005 and 2016, indicate a deliberate multi-year strategy to build layered IP coverage across flash wear leveling, phase-change memory, and embedded fast-access NVM architectures. Tracking continuation and related filing activity from this portfolio can reveal whether additional claims in adjacent NVM spaces remain pending or recently granted.
Portfolio coverageWear leveling and embedded NVM: active innovation fronts in flash IP
Flash wear leveling algorithms and embedded fast read/write NVM subsystems are active filing areas as 3D NAND, QLC flash, and storage-class memory scale up. Patent activity from major NAND players — including Micron, Samsung, SK Hynix, and Kioxia — around wear leveling optimisation and NVM controller architectures signals continued IP competition in these domains. Monitoring filing trends here is essential for R&D teams building next-generation storage controllers.
Filing trend: NVM controllersMicron's defensive IP depth in NAND flash and phase-change memory
As a defendant in this eight-patent Federal Circuit appeal, Micron Technology's own patent portfolio in NAND flash architecture, PCM cell design, and memory controller IP is commercially significant context. Mapping Micron's filing activity in wear leveling and embedded NVM architectures can illuminate both its defensive posture and technology roadmap signals relevant to competitors and supply chain partners.
Micron defensive portfolioAdjacent NVM white space: storage-class memory and 3D NAND control
The Flash-Control portfolio focuses on wear leveling, PCM element operation, and embedded fast-access NVM. Adjacent filing white space may exist in 3D NAND error management, storage-class memory (SCM) tiering algorithms, and hybrid DRAM-NVM controller architectures — areas not directly covered by the asserted patents but closely related in the NVM stack. R&D teams can use this gap mapping to prioritise novel filings.
White space: SCM and 3D NANDSimilar Federal Circuit appeals in flash memory and non-volatile memory patent disputes
Explore Federal Circuit appeals involving flash memory wear leveling, phase-change memory, and NVM architecture patents — cases structurally comparable to Flash-Control v. Micron.
What this case signals for the flash memory IP landscape
A multi-patent Federal Circuit appeal dismissed by agreement raises watch-points for any firm active in NAND flash, phase-change memory, or embedded non-volatile memory architectures.
Eight live patents, no Federal Circuit validity ruling — monitor for future assertion
The dismissal leaves all eight Flash-Control patents formally intact with no Federal Circuit endorsement or invalidation. Firms active in flash wear leveling, multilevel phase-change memory, or embedded fast read/write non-volatile memory systems should treat these patents as unresolved enforcement risks and maintain active FTO monitoring against this portfolio.
Consensual appellate exit suggests resolution — but terms are entirely private
A Rule 42(b) dismissal by agreement at the Federal Circuit, with each side bearing its own costs, is consistent with a negotiated resolution between the parties. However, the specific terms are not disclosed in the available record. Industry observers should not assume the patents are off the table for third parties based solely on this dismissal.
Flash-Control v Micron — key questions answered
The Federal Circuit appeal was dismissed. The recorded basis of termination is 'Appeal Dismissed'. The docket order states that, the parties having so agreed, the proceeding was dismissed under Fed. R. App. P. 42(b), with each side bearing its own costs. No merits ruling was issued on the validity or patentability of any of the eight asserted patents.
Flash-Control asserted eight U.S. patents: US8817537B2, US7855916B2, US8194452B2, US7853749B2, US7254059B2, US9792219B2, US9257184B2, and US8531880B2. The technologies covered include flash drive fast wear leveling, multilevel phase-change memory elements and operating methods, and non-volatile memory systems with embedded fast read and write memory capabilities.
A dismissal under Fed. R. App. P. 42(b) is a consensual procedural termination of the appellate proceeding. It does not constitute a ruling on the validity or patentability of the asserted patents. The eight Flash-Control patents remain formally in existence; the Federal Circuit issued no ruling that invalidates or confirms their validity. The specific terms underlying the parties' agreement are not disclosed in the available record.
Flash-Control was represented by Derek Dahlgren, James Michael Lennon, and Timothy Devlin of Devlin Law Firm LLC. Micron Technology was represented by Elizabeth Moulton, James Anglin Flynn, Jared Bobrow, and Jeremy Jason Lang of Orrick Herrington & Sutcliffe LLP.
The products identified in the case record are flash drive fast wear leveling systems, multilevel phase-change memory elements and their operating methods, and nonvolatile memory systems with embedded fast read and write memories. These product categories are directly relevant to Micron's NAND flash memory and non-volatile memory product lines.
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