Causam Enterprises v. Unified Patents: Federal Circuit Affirms Unpatentability
Causam Enterprises, Inc. appealed an IPR determination that its smart grid patent US10396592B2 — covering dispatchable operating reserve energy capacity through active load management — was unpatentable. A unanimous Federal Circuit panel affirmed in 714 days, leaving the patent cancelled and Causam’s enforcement position extinguished.
Smart Grid Patent Extinguished on Appeal at the Federal Circuit
Causam Enterprises, Inc. filed this appeal at the Court of Appeals for the Federal Circuit on 22 September 2023, challenging a Patent Trial and Appeal Board determination that US10396592B2 was unpatentable. The patent, titled around a system and method for estimating and providing dispatchable operating reserve energy capacity through active load management, sits at the intersection of smart grid technology, demand response, and grid balancing — a commercially significant area as utilities and energy technology companies race to integrate distributed energy resources.
On 5 September 2025, a per curiam panel comprising Circuit Judges Taranto, Chen, and Stoll unanimously affirmed the PTAB’s unpatentability finding. The basis of termination is recorded as ‘Unpatentable,’ confirming that the claims of US10396592B2 did not survive the IPR challenge brought by Unified Patents, LLC. For Causam, affirmance means the patent is effectively cancelled — it cannot be asserted against any party and no appeal remains at this court level.
The 714-day duration suggests the Federal Circuit gave the matter substantive attention, though per curiam disposition without a named author typically signals the panel found the outcome sufficiently clear to warrant a summary ruling rather than a precedential opinion. What drove the unpatentability finding — whether obviousness over prior art, anticipation, or a combination — is not detailed in the public termination record, but the unanimity of the three-judge panel leaves little ambiguity about the outcome’s finality.
Filing to Unpatentable in 714 days
714 days from filing to Federal Circuit decision — typical Fed Circuit appeals resolve in 12–18 months
Federal Circuit affirms: what the unpatentability ruling means for both parties
Affirmance means the PTAB’s cancellation of the patent stands
When the Federal Circuit issues an ‘AFFIRMED’ ruling, it signals that the panel reviewed the decision below — here, the PTAB’s finding of unpatentability — and found no reversible legal error. The court applies deferential review to factual findings and de novo review to legal questions of patentability. A per curiam affirmance without a substantive opinion suggests the panel viewed the outcome as well-supported by the record.
No reversible error foundUS10396592B2 is cancelled — Causam loses its enforcement position entirely
For Causam Enterprises, affirmance is a terminal outcome for this patent. US10396592B2 is unpatentable as confirmed by the nation’s top patent court, meaning Causam cannot assert it in any future infringement action. Any licensing programme built around this patent is extinguished. Causam’s only remaining theoretical option — a petition for certiorari to the Supreme Court — faces an extremely high threshold and is statistically unlikely to be granted.
Patent cancelled — unenforceableUnified Patents secures full cancellation, validating its IPR strategy
Unified Patents, LLC achieved its objective: the asserted patent is cancelled and can no longer threaten its members or the broader technology community. The Federal Circuit affirmance closes the appellate loop, meaning the patent cannot be revived at this level. This outcome is consistent with Unified Patents’ aggregated IPR model, in which crowdfunded challenges are brought to protect industry members from what the organisation characterises as non-practising entity assertions.
IPR challenge fully successfulActive load management IP space sees one fewer assertion risk
Utilities, demand response aggregators, virtual power plant developers, and smart grid technology vendors that may have faced licensing demands or litigation risk from US10396592B2 can now operate freely with respect to this specific patent. However, the broader portfolio picture for Causam — and the validity of related patents covering similar active load management methods — remains a separate question that market participants should continue to monitor independently.
FTO improved for grid tech sectorFull party and counsel information
| Role | Name | Type | Detail |
|---|---|---|---|
| Plaintiff | CAUSAM ENTERPRISES, INC. | Company | Smart grid energy management technology company — holder of US10396592B2Search in Eureka ↗ |
| Defendant | Unified Patents, LLC | Company | Unified Patents, LLC — aggregated patent challenge organisation specialising in IPR petitionsSearch in Eureka ↗ |
| Plaintiff counsel | James Thomas Wilson | Attorney | Counsel for CAUSAM ENTERPRISES, INC.Search in Eureka ↗ |
| Plaintiff counsel | Wayne Michael Helge | Attorney | Counsel for CAUSAM ENTERPRISES, INC.Search in Eureka ↗ |
| Plaintiff law firm | Bunsow DeMory LLP | Law Firm | Representing CAUSAM ENTERPRISES, INC.Search in Eureka ↗ |
| Defendant counsel | Angela M. Oliver | Attorney | Counsel for Unified Patents, LLCSearch in Eureka ↗ |
| Defendant counsel | David L. McCombs Esq. | Attorney | Counsel for Unified Patents, LLCSearch in Eureka ↗ |
| Defendant counsel | Debra Janece McComas | Attorney | Counsel for Unified Patents, LLCSearch in Eureka ↗ |
| Defendant counsel | Jordan Michael Rossen | Attorney | Counsel for Unified Patents, LLCSearch in Eureka ↗ |
| Defendant counsel | Laura Vu | Attorney | Counsel for Unified Patents, LLCSearch in Eureka ↗ |
| Defendant counsel | Michelle Aspen | Attorney | Counsel for Unified Patents, LLCSearch in Eureka ↗ |
| Defendant counsel | Roshan Mansinghani | Attorney | Counsel for Unified Patents, LLCSearch in Eureka ↗ |
| Defendant law firm | Haynes & Boone LLP | Law Firm | Representing Unified Patents, LLCSearch in Eureka ↗ |
| Defendant law firm | Unified Patents, LLC | Law Firm | Representing Unified Patents, LLCSearch in Eureka ↗ |
| Presiding judge | Judge N/A | Judge | Court of Appeals for the Federal CircuitSearch in Eureka ↗ |
Official order — verbatim text
The per curiam order — ‘AFFIRMED’ — represents a complete, unconditional endorsement of the PTAB’s unpatentability determination by all three Federal Circuit judges. Per curiam disposition without an accompanying written opinion suggests the panel found no reversible error on any ground and considered the record sufficiently clear to foreclose the need for precedential guidance. For Causam, this leaves no viable path to patent reinstatement at the appellate level. For Unified Patents and its members, the ruling confirms the strategic value of well-targeted IPR petitions in the smart grid and active load management space.
US10396592B2 — Dispatchable Operating Reserve Energy via Active Load Management
US10396592B2, filed under application number US15/594219, protects a system and method for estimating and providing dispatchable operating reserve energy capacity through the use of active load management. The invention sits within the demand response and smart grid control domain — specifically addressing how distributed loads can be dynamically managed to provide grid balancing services typically reserved for conventional generating assets. This technology area has grown in commercial relevance as grid operators seek flexible, software-driven alternatives to spinning reserve.
The patent’s cancellation removes what was potentially a blocking position in the active load management and virtual dispatchable reserve space. Competitors developing demand response aggregation platforms, virtual power plant controllers, or grid-edge management software may have faced assertion risk from this patent. With cancellation confirmed by the Federal Circuit, the claim scope is permanently extinguished — though organisations should note that Causam may hold related patents or continuations covering adjacent aspects of the same technology, warranting ongoing portfolio monitoring.
Should your team run an FTO analysis against US10396592B2?
For companies developing active load management systems, demand response platforms, virtual power plants, or grid balancing software, US10396592B2 is now cancelled and no longer presents a direct freedom-to-operate risk. However, IP and R&D teams should not treat this cancellation as a full clearance — Causam’s broader portfolio may include patents covering similar dispatchable reserve or load estimation methods that remain in force. Any product in the demand response or grid flexibility space warrants a clean-slate FTO review.
PatSnap Eureka’s FTO Search Agent enables R&D and IP teams to map the full Causam portfolio, identify continuation or divisional patents sharing the US15/594219 priority chain, and benchmark claim language against active load management product architectures. Eureka surfaces related prior art, tracks patent family status in real time, and flags newly published applications that could present future risk — giving product teams the confidence to build in a dynamic patent environment.
Run a freedom-to-operate analysis on US10396592B2 to assess your product’s exposure
Run FTO in Eureka →Similar Federal Circuit IPR Appeals in Smart Grid and Energy Management Patents
Federal Circuit appeals affirming PTAB unpatentability findings in smart grid, demand response, and active load management patent cases from the past five years.
What this case signals for the smart grid and demand response IP landscape
A unanimous Federal Circuit affirmance of PTAB unpatentability carries significant weight for energy management IP strategy.
Unified Patents’ IPR model continues to deliver cancellations at the Federal Circuit
This case reinforces that aggregated IPR challenges — where Unified Patents acts on behalf of member companies — can survive full appellate review. For smart grid and energy technology companies weighing IPR participation, this outcome demonstrates that PTAB findings in this sector hold up under Federal Circuit scrutiny, at least where the panel issues a per curiam affirmance.
Per curiam dispositions signal limited grounds for further challenge
A unanimous per curiam ruling at the Federal Circuit, without a named author or substantive written opinion, typically suggests the panel found no close legal question warranting elaboration. For IP counsel tracking active load management patent assertions, this outcome suggests the claims of US10396592B2 faced clear prior art or structural validity problems that did not require extended appellate analysis.
CAUSAM v Unified — key questions answered
The Federal Circuit unanimously affirmed the PTAB’s finding that US10396592B2 — Causam Enterprises’ patent covering dispatchable operating reserve energy capacity through active load management — was unpatentable. The per curiam order issued on 5 September 2025 closes the appellate record; the patent is effectively cancelled.
US10396592B2 (application US15/594219) is a Causam Enterprises patent directed to a system and method for estimating and providing dispatchable operating reserve energy capacity through active load management. The technology sits within the smart grid and demand response space, enabling distributed loads to provide grid balancing services analogous to traditional spinning reserve — a commercially significant capability as utilities integrate more distributed energy resources.
Unified Patents, LLC is an organisation that files inter partes review petitions on behalf of member companies to challenge patents it considers to pose NPE assertion risk to the technology community. Its IPR challenge against US10396592B2 succeeded at the PTAB and was affirmed at the Federal Circuit. The case is consistent with Unified Patents’ strategic model of crowdfunded patent challenges in technology-heavy sectors including energy management.
No — cancellation of US10396592B2 applies only to the specific claims of that patent. Causam may hold continuation, divisional, or otherwise related patents covering adjacent aspects of active load management or dispatchable reserve technology. Companies in the demand response and smart grid space should independently assess Causam’s remaining portfolio rather than assuming full clearance from this single cancellation.
A per curiam affirmance means all three judges agreed to uphold the decision below without designating a single author or issuing a substantive written opinion — typically signalling that the panel found the outcome clear and not requiring precedential guidance. Further appeal to the Supreme Court via certiorari petition is theoretically available but statistically rare; the Supreme Court grants certiorari in fewer than 1% of cases, and patent unpatentability appeals are not a common focus.
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