Microreactor Fuel (TRISO/HALEU) Patent Snapshot 2026
The patent corpus for microreactor fuel — encompassing TRISO particle and HALEU-related technologies — is at an extremely early stage, with a single patent family on record filed by China Nuclear Power Engineering Co Ltd in 2021 and prosecuted in Canada. Given this near-absence of filed art, the space is largely open, though the technical barriers to entry in nuclear fuel qualification remain high.
A single filer defines a nascent, highly concentrated field
China Nuclear Power Engineering Co Ltd is the sole ranked applicant in this corpus, holding the only patent family identified in scope. Concentration at this level is absolute: one organization accounts for all disclosed activity.
Because the corpus contains only one patent family, there is no meaningful tier gap to describe — there are no challengers, followers, or long-tail filers. The field is structurally pre-competitive from a patent-filing standpoint.
| # | Applicant | Patent families | Share |
|---|---|---|---|
| 1 | China Nuclear Power Engineering Co Ltd | 1 |
The leader’s single filing prosecuted in Canada signals an early-stage effort to establish rights in a specific jurisdiction, rather than a broad global filing strategy. This pattern is consistent with an exploratory or foundational IP position rather than defensive saturation.
The most recent filing years carry publication lag and may not fully reflect activity from the past 18–24 months; the corpus should be treated as a lower bound on actual activity in this period. Longer-window growth, applicant concentration, and technology-route coverage are therefore more reliable signals than the latest-year bar alone.
A single 2021 filing event with no surrounding activity
The annual filing trend and technology composition together paint a picture of an isolated disclosure rather than a sustained research program; the one IPC class present reflects the expected nuclear-reactor classification.
Annual filing trend
A single filing appeared in 2021; all other years in the observed window show zero activity. The apparent drop after 2021 should be interpreted cautiously given publication lag, but the pre-2021 zero baseline confirms this is not an established filing stream.
↗ Hover for values · click a bar to ask EurekaTechnology composition
All activity falls under G21C (Nuclear reactors), confirming that the single family addresses core reactor/fuel technology. No adjacent IPC classes appear in the current corpus, leaving the broader TRISO fabrication, fuel cycle, and thermal-hydraulic branches uncharted.
↗ Hover for values · click a bar to ask EurekaHighly cited patent families surfaced by the query
Citation-heavy patent families returned by the query. Use this section as citation context, not as a curated list of the most topic-specific patents.
Homogenized coated particle dispersion fuel and pr…
A homogenized coated particle dispersion fuel and a preparation method therefor. The homogenized coated particle dispersion fuel comprises a matrix material, dressed TRISO coated fuel particles and a series of silicon carbide cylinder bodies (1). The radial uniform distribution of the TRISO coated fuel particles is achieved, the temperature gradient of the… (excerpt from the patent abstract)
Open this patent in Eureka →Ranked by total forward citations. Citation counts favour older and broadly cited patent families, and broad or adjacent patents may appear when they match the search scope. Treat this section as citation context, not as a curated list of the most topic-specific patents. Some patent titles may be shown in their original, non-English language where an accurate translation could not be guaranteed.
Assignee snapshot from the current evidence set
The applicants below are visible in this query result. Because the evidence set is relatively small, read this section as a directional snapshot rather than a full competitive ranking.
China Nuclear Power Engineering Co Ltd
The company filed one patent family in 2021, classified under G21C 21 (Nuclear reactors) and G21C 3 (Nuclear reactors), prosecuted in Canada. No applicant momentum data is available for prior-period comparison given the single-event nature of the corpus. Their technology focus — core reactor/fuel structure classification — is consistent with upstream fuel assembly or fuel element design work.
patent families: 1No challenger on record
No second-ranked applicant exists in this corpus. Any organization filing in microreactor TRISO/HALEU fuel technology would immediately become a co-leader by patent count. This absence of challengers is itself the defining structural fact of this landscape.
patent families: 0Frequently asked questions
The current corpus contains one patent family in scope. This should be treated as a lower bound given publication lag in the most recent 18–24 months.
China Nuclear Power Engineering Co Ltd is the sole identified filer, holding the single patent family on record with an application filed in Canada in 2021.
Canada is the only jurisdiction identified in the current corpus, corresponding to application CA3228079A1. No USPTO, EPO, PCT, or other national filings appear in this dataset.
All identified activity falls under G21C (Nuclear reactors), specifically sub-classes G21C 21 and G21C 3. Adjacent branches such as TRISO fabrication process classes or HALEU fuel-cycle classes are not represented in the current corpus.
The lifecycle stage is classified as Decline based on annual volume easing from the 2021 peak, but this classification reflects the mathematics of a single-event corpus. Practically, the field is pre-commercial from an IP density perspective, and the absence of a sustained filing stream means the classification should be read with caution.
The most observable gaps are in TRISO particle fabrication and coating processes (absent from the corpus) and HALEU enrichment, handling, and transport (also absent). Both areas have active technical programs internationally but show no patent art in this dataset, making them under-served adjacent branches worth monitoring.
Ready to map your own microreactor fuel Patent Snapshot?
Join 18,000+ innovators using PatSnap Eureka to map any technology landscape: search 2B+ patents and papers, surface key assignees, and generate a report like this in minutes.
Disclaimer. This page is generated from PatSnap Eureka data drawn from a limited snapshot of global patent and scientific-literature records, and is provided for general information and reference only.
Patent data carries inherent limitations: recent filings (typically the most recent 18–24 months) are under-counted due to standard publication lag; counts may be reported at either a patent-family or a patent-record basis and are not always directly comparable; classification, applicant-name, and citation data may contain errors, duplicates, or omissions; and the underlying search query defines and constrains the scope shown. As a result, the analysis may be incomplete or inaccurate and may not reflect the full technology landscape.
Nothing on this page constitutes an exhaustive prior-art, novelty, freedom-to-operate, or validity search, nor does it constitute legal, financial, investment, or professional advice, and it should not be relied upon as such. Any patent, commercial, or strategic decision should be verified independently and reviewed with qualified patent, legal, and domain professionals. PatSnap makes no warranties, express or implied, as to the accuracy, completeness, or fitness for any particular purpose of the information presented.