Aluminium Cast House Operations Patents: Who Holds the Ground
76.5% concentration. The top 5 assignees combined account for 834 of the 1,090 records in scope — a field where the leading position is dominant rather than contested. Annual filings climbed from 54 in 2017 to a peak of 178 in 2018, then eased through the following years — 162 in 2021 down to 51 in 2024, a -69% move over that three-year span. Treat 2025 and 2026 as still filling in rather than as evidence of a further decline, since publication lags filing by roughly 18 months.
- 1NOVELIS INC(US)728
- 2FUJIFILM CORP33
- 3WAGSTAFF INC25
- 4NOVELIS KOBLENZ GMBH25
- 5ALCOA INC23
See the full aluminium cast house operations 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 about this landscape
Who holds the most patents in aluminium cast house operations?
One assignee holds 728 of the 1,090 records in scope, making it the clear leader by a wide margin. The top 5 assignees together account for 76.5% of all records, and the top 10 reach 84.2%. This is a field where a small number of portfolios cover most of the claim space, so any competitive or licensing analysis should start with that group rather than the long tail of single-filing entrants.
Is patent filing in this space growing or slowing down?
Filing peaked in 2018 at 178 records and has since declined, with 2021's 162 falling to 51 by 2024 — a documented -69% move over that three-year span. Figures for 2025 and 2026 are still incomplete because publication typically lags filing by around 18 months, so it is too early to call the recent years a continued decline rather than a data gap. Treat 2024 as the most recent year with a reasonably complete count.
What technology areas get the most patent claims in aluminium casting?
Alloy composition (IPC class C22C) appears on 50.5% of the 1,090 records, and non-ferrous metal treatment (C22F) on 43.4%, making these the two densest claim areas. Metal casting process and equipment (B22D) covers 21.7% of records — meaningful, but well behind composition and treatment. Because a single record can carry multiple IPC classes, these percentages overlap rather than sum to 100%.
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 Cast House Operations 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.