Heavy Ingot Casting Patents: Top Companies & Filing Trends 2026
Heavy Ingot Casting and Segregation Patents: Who Holds the Claims
Filing peaked in 2021 at 9 records, then fell 78% to 2 by 2024 — a field that saw a short burst of activity rather than sustained build-out. Filing climbed to a peak of 9 records in 2021, then declined to 2 by 2024 — a 78% drop over that three-year span. Earlier years, including 2017, show no filings at all, so the entire visible cycle in this dataset plays out inside a roughly seven-year window.
- 1WAGSTAFF INC10
- 2JIANGYIN XINGCHENG SPECIAL STEEL WORKS CO LTD6
- 3PECHINEY RHENALU5
- 4KAWASAKI STEEL CORP4
- 5OGLEBAY NORTON2
See the full heavy ingot casting and segregation 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 are the leading patent holders in heavy ingot casting and segregation?
The ranked list covers 31 companies, with the leading assignee holding 10 of the 60 records in scope and the top 5 combined accounting for 45.0% of all records. Holdings drop sharply after the leader, with the fifth-ranked and tenth-ranked assignees each holding only 2 records. This means the field has one clear leader plus a long tail of firms with one or two filings each, so a competitive review should start with the leader’s portfolio rather than treating the field as evenly contested.
Is patent filing in this area still growing?
No — filing peaked at 9 records in 2021 and had fallen to 2 by 2024, a 78% decline over that span. Because publication lags filing by roughly 18 months, 2025 and later data is still incomplete, but the 2021-to-2024 trend already shows a clear pullback from peak activity. Anyone assessing this space should treat it as past a filing burst rather than in an active growth phase.
What technology areas do these patents actually cover?
The large majority, 78.3% of all 60 records, sit in IPC subclass B22D covering metal casting mechanics such as pouring and mould control. Alloy composition (C22C) and heat treatment (C21D) each cover smaller but notable shares, while foundry moulding, refractories, steelmaking, metal refining and rolling each appear in only a handful of records. This tells a practitioner that most competitive activity is about how the metal is poured and solidified, not what alloy it is made from.
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 Heavy Ingot Casting and Segregation 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.