Incineration Fly Ash Patents: Who Leads, Where the Gaps Are 2026
Incineration Fly Ash Detoxification Patents
Concentrated but not locked up. the leading assignee holds 32 records, yet the top 5 combined account for only 16.3% of the 569 records in scope — a long tail files the rest. Annual filings rose from 15 in 2017 to a peak of 76 in 2022, then held at a high plateau — 53 in 2021 climbing to 75 by 2024, a 42% increase over that span. 2025 and 2026 figures are undercounted because publication typically lags filing by around 18 months; they should not be read as a decline.
- 1EASYMINING SWEDEN AB5.6%
- 2ZHEJIANG UNIV4.2%
- 3ENGRO CORPORATION2.6%
- 4UNIV OF SCI & TECH BEIJING2.1%
- 5AGC INC1.8%
See the full incineration fly ash detoxification analysis in Eureka
- The complete ranking, not just the top five
- Every IPC branch with its share of the corpus
- The most-cited records, and where claim space is still thin
Common questions on this landscape
Who holds the most patents on incineration fly ash detoxification?
The leading assignee in this dataset holds 32 of the 569 records in scope, roughly three times the fifth-placed filer’s 10 records. But concentration is low overall: the top 5 assignees combined account for only 16.3% of all records, so no single company controls the field. A practical search should look well beyond the top-ranked names into the long tail of smaller filers, many of whom hold only one or two records.
Is patent filing for fly ash detoxification still growing?
Yes, based on the most recent complete years of data. Filings rose from 53 in 2021 to 75 in 2024, a 42% increase, after an earlier peak of 76 in 2022. Figures for 2025 and 2026 look lower, but that reflects the roughly 18-month lag between filing and publication rather than an actual slowdown, so those years should not yet be read as a decline.
What technology areas do these patents actually cover?
Over half of the 569 records, 52.7%, are classified under B09B, solid waste disposal, making it the dominant category. Cement, ceramics and refractories (C04B) follow at 23.6%, reflecting how often detoxified fly ash is claimed as a solidified or ceramic-bound product rather than a treated waste stream alone. Smaller but still substantial shares cover water treatment, chemical detoxification, separation processes, and alkali or alkaline-earth compound chemistry — the last two point to a narrower but real body of art on transforming the ash chemically.
Disclaimer. This analysis is based on Patsnap Eureka data drawn from a limited snapshot of global patent records and is provided for general information and reference only. Patent data carries inherent limitations — recent filings are under-counted because of publication lag, counts may be on a record or family basis, classification and applicant-name data may contain errors or duplicates, and the underlying search query defines the scope shown — so the analysis may be incomplete or inaccurate and may not reflect the full technology landscape.
Nothing here is an exhaustive prior-art, novelty, freedom-to-operate or validity search, nor does it constitute legal, financial or professional advice, and it should not be relied upon as such. Verify independently and review with qualified patent and legal professionals before acting on it.
Method: Filing trend and technology composition. Derived from a Patsnap search on Incineration Fly Ash Detoxification covering 2015–2026, data cut-off 2026-07-31. Counts reflect published records only and shift as new filings publish. Every share divides by all records in scope. Data: Patsnap Eureka. See the full landscape report.