Ammonia Combustion Patents: Who Leads, Where the Gaps Are 2026
Ammonia Combustion and Cofiring Patents: Filing Trends and Leading Assignees
Concentrated but not locked up: the top 5 assignees hold 36.1% of all 158 records in scope, and the top 10 hold 52.5% — leaving a long tail of single- and few-filing entrants. Filings moved from zero in 2017 to a peak of 28 in 2023, with the 2021–2024 window alone showing 60% growth (15 to 24 records). The 2026 figure of 6 is a partial year and should not be read as a slowdown.
- 1IHI CORP19
- 2AMOGY INC14
- 3JFE ENGINEERING CORP11
- 4TRANSPORTATION IP HOLDINGS LLC7
- 5LAIR LIQUIDE SA POUR LETUDE & LEXPLOITATION DES PROCEDES GEORGES CLAUDE6
See the full ammonia combustion and cofiring 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 ammonia combustion patents
How many patent families exist for ammonia combustion and cofiring?
The dataset behind this landscape contains 158 published records covering ammonia combustion, cofiring and related burner technology, filed between 2015 and the 2026 data cut-off. These records are ranked across 72 distinct assignees, so no single company holds anywhere close to a majority. Because publication lags filing by roughly 18 months, the most recent one to two years of this count will keep rising as more applications publish.
Who are the leading patent holders in ammonia combustion technology?
The ranking is led by a single assignee holding 19 records, well ahead of fifth place at 6 and tenth place at 4. Combined, the top 5 assignees account for 36.1% of all 158 records and the top 10 account for 52.5%, leaving nearly half the field spread across a long tail of smaller filers. This pattern — one clear leader, a compressed mid-tier, and a wide base of occasional filers — suggests the technology is still open to new entrants rather than locked up by an incumbent group.
Is ammonia combustion patent filing activity growing?
Yes: annual filings rose from 15 in 2021 to 24 in 2024, a 60% increase over that three-year span, with a peak of 28 records in 2023. Filing activity was essentially absent before 2017, so this is a technology area that has built up patent density almost entirely within the last decade. Figures for 2025 and 2026 are still incomplete due to normal publication lag and should not be read as a decline.
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 Ammonia Combustion and Cofiring 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.