Stainless Steel for Hydrogen Service Patents: Top Companies & Trends 2026
Stainless Steel for Hydrogen Service Patents: Who Leads and Where Filing Is Concentrated
37.4% of all 1,927 records sit with just five assignees, and the top ten reach 52.0% — this field has a concentrated core and a long tail. Annual filings ran from 65 in 2017 to a peak of 118 in 2023. Growth from 2021 (51) to 2024 (62) came to +22% over that three-year span; 2024 is the most recent year complete enough to read as a trend, since publication typically lags filing by around 18 months and 2025-2026 figures are still filling in.
- 1OUTOKUMPU OY12.4%
- 2JFE STEEL CORP7.8%
- 3NIPPON STEEL CORPORATION7.5%
- 4ATI PROPERTIES INC5.2%
- 5POHANG IRON & STEEL CO LTD4.6%
See the full stainless steel for hydrogen service 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
Frequently asked questions
What grade of stainless steel resists hydrogen embrittlement best?
Austenitic grades with carefully balanced nickel and manganese content, engineered for austenite stability under strain, dominate the patent filings in this dataset — C22C alloy composition claims appear in 77.9% of the 1,927 records in scope. The specific answer depends on service pressure and temperature, but claims consistently pair a stated elemental range with a microstructural control such as carbonitride precipitate size. Ferritic-austenitic (duplex) compositions also appear among the most-cited records, suggesting they remain a reference point even where filing volume is lower.
Who are the leading patent filers in stainless steel for hydrogen service?
Filing is concentrated at the top: the five leading assignees together account for 37.4% of the 1,927 records in scope, and the ten leading assignees reach 52.0%. The single leading assignee holds 238 records, well ahead of the fifth-place filer at 89 and the tenth-place filer at 38. Beyond the ranked leaders there is a long tail of single- or few-filing entrants, which is typical of a field with an established core technology and ongoing incremental improvement around it.
Is filing activity in this field growing or slowing?
Filing grew 22% from 51 records in 2021 to 62 in 2024, the most recent year that can be read reliably given an average 18-month lag between filing and publication. The field peaked so far at 118 records in 2023. Figures for 2025 and 2026 are still incomplete and should not be read as a decline; they will continue to fill in as publications catch up.
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 Stainless Steel for Hydrogen Service 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.