Fused and Sintered Alumina Abrasive Grain Patents: Leaders & Trends 2026
Fused and Sintered Alumina Abrasive Grain Patents
One filer dominates the ranked field. the leader holds 95 records against a fifth-place company at 11 and a tenth-place company at 2, a steep drop from the top down through a long tail of single-digit filers. Filings peaked at 19 in 2017 and had fallen to zero recorded filings by 2024, a -100% move over the 2021-2024 span. Because publication typically lags filing by around 18 months, the 2025 and 2026 counts are still incomplete and should not be read as confirmation that activity has stopped — only that the last complete year on record shows none.
- 1MORTON CO95
- 2SAINT GOBAIN ABRASIVES INC92
- 3SAINT GOBAIN ABRASIFS SA47
- 4THE CARBORUNDUM CO11
- 5WASHINGTON MILLS MANAGEMENT11
See the full fused and sintered alumina abrasive grain 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 field
Who holds the most patents on fused and sintered alumina abrasive grain?
One company leads the ranked field with 95 records, well ahead of the fifth-place filer at 11 and the tenth-place filer at 2. That leader’s portfolio, together with a closely related regional entity it frequently co-files with, covers the foundational sintered sol-gel alumina filament claims dating back to the early 1990s. The remaining 22 ranked companies each hold comparatively small counts, forming a long tail of narrower process and grading improvements rather than competing base chemistry claims.
Is patent filing in fused alumina abrasive grain increasing or decreasing?
Filings peaked at 19 in 2017 and the most recent complete year shows the total down to zero, a -100% change over the 2021-2024 span. However, publication lags filing by roughly 18 months, so the 2025 and 2026 figures in this dataset are still incomplete and should not be treated as proof that filing activity has genuinely stopped. A fairer read is that the field has gone quiet in the visible record, with the real trend for the most recent years still to emerge.
What does EP0395091B1 actually cover?
EP0395091B1, filed by Norton Company, claims a sintered sol-gel alumina based filament composed predominantly of fine alpha alumina crystals, along with a method of making it and its use as an abrasive particle or as reinforcement in composite materials. It is one of the founding documents in this citation network, and later filings in the sintered filament space generally build on or narrow this base claim rather than replace it. Anyone drafting new claims on sintered alumina filaments should review it directly rather than rely on secondary summaries.
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 Fused and Sintered Alumina Abrasive Grain 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.