Casting Porosity Control Patents: Who Leads, Trends 2026
Porosity and Defect Control in Large Castings: Patent Trends
Filings jumped +800% from 2021 to 2024, the fastest sustained run in the dataset before publication lag starts understating 2025-2026. Annual filings moved from 4 in 2017 to a peak of 12 in 2023, with the sharpest single stretch between 2021 (1 filing) and 2024 (9 filings) — a +800% rise. 2025 and 2026 figures are still incomplete due to publication lag and should not be read as a slowdown.
- 1BRUNSWICK CORP17
- 2METAL CASTING TECHNOLOGY INC16
- 3HITCHINER MANUFACTURING CO INC15
- 4SLOAN VALVE CO14
- 5GM GLOBAL TECHNOLOGY OPERATIONS LLC14
See the full porosity and defect control in large castings 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
How many patents cover porosity and defect control in large castings?
This landscape identifies 255 published patent records matching the combination of casting defect terms (porosity, shrinkage, gas content) with process-control or inspection terms (vacuum level, spray lubricant, radiographic inspection, leak testing, scrap rate). The count spans filings from 2015 through the 2026-07-31 data cut-off. Because publication lags filing by roughly 18 months, the true number of 2025-2026 filings is higher than currently published records show.
Who are the leading patent holders in casting porosity control?
The ranked list covers 96 assignees, with the leader holding 17 of the 255 records and the top 5 combined accounting for 29.8% of all records in scope. The top 10 assignees together reach 50.2% of the field, meaning roughly half of all filings come from a broad base of smaller or single-filing entrants rather than a handful of dominant players. This spread suggests the field rewards a distinctive technical angle rather than requiring a large existing portfolio to compete.
Is patent activity in this field growing or slowing down?
Filings grew sharply, rising from 1 in 2021 to 9 in 2024, an increase of 800% over that span, with the dataset’s peak year so far at 12 filings in 2023. Figures for 2025 and 2026 appear lower, but that reflects publication lag rather than an actual drop in filing activity, since patent applications typically publish about 18 months after they are filed. Anyone judging momentum should treat the last one to two years as incomplete rather than declining.
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 Porosity and Defect Control in Large Castings 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.