Al-Si Coated Press Hardening Steel Patents: Top Companies & Trends 2026
Aluminium Silicon Coated Press Hardening Steel Patents: Who Leads and Where the Field Is Open
Concentrated at the top. The five leading filers hold 76.6% of all 111 records in scope, and the leading ten hold 96.4% — a field with very little room left among generalist claims. Filings ran from 21 in 2017 to a peak of 40 in 2019, before rebuilding from 4 in 2021 to 16 in 2024 — a +300% increase over that three-year span. 2025 and 2026 figures are still filling in given the typical 18-month publication lag, so the apparent tail should not be read as a slowdown.
- 1AUTOTECH ENG SL35
- 2OUTOKUMPU OY20
- 3POHANG IRON & STEEL CO LTD12
- 4MAGNA INTERNATIONAL INC11
- 5TATA STEEL LTD7
See the full aluminium silicon coated press hardening steel 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 aluminium silicon coated press hardening steel?
One assignee leads with 35 of the 111 records in this dataset, well ahead of the rest of the field; the fifth-ranked company holds 7 and the tenth holds 3. The top five combined account for 76.6% of all records, and the top ten account for 96.4%, so the field is dominated by a small group of automotive steel and component suppliers rather than being evenly spread. This concentration makes freedom-to-operate checks against the leading handful of filers the highest-priority step for any new entrant.
Is filing activity in this field growing or slowing down?
Filings rebuilt from 4 records in 2021 to 16 in 2024, a +300% increase over that span, after an earlier peak of 40 records in 2019. The apparent drop in 2025 and 2026 is a publication-lag artefact — patent filings typically take about 18 months to publish, so the most recent one to two years always look lower than they eventually will. Based on the complete years through 2024, the trend is one of renewed acceleration, not decline.
What does EP4779049A1 actually claim?
EP4779049A1 claims a specific hydrogen-embrittlement-resistant press hardening steel alloy defined by a compositional window across carbon, manganese, niobium, chromium, boron, titanium and several optional elements, with an explicit ratio constraint between chromium and niobium content. It is a composition-of-matter claim rather than a process or coating claim, filed by an automotive technology company. Anyone formulating a similarly alloyed hydrogen-resistant press hardening steel should check their composition against this specific elemental range and ratio before finalising a formulation.
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 Aluminium Silicon Coated Press Hardening Steel 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.