Fluoroelastomer sealing compound patents: who holds the compression-set and cure claims
70.2% concentration. The top 5 of 61 ranked assignees hold 186 of 265 records in scope — five companies account for over two-thirds of the field. Recorded filings rose to a peak of 20 in 2022, then fell steeply — 14 in 2021 to 1 in 2024, a 93% drop over that span. Because publication lags filing by roughly 18 months, the 2025-2026 counts (including the 0 shown for 2026) are not yet complete and should not be read as a continued decline; the reliable read stops at 2024.
- 13M INNOVATIVE PROPERTIES CO98
- 2EI DU PONT DE NEMOURS & CO32
- 3FREUDENBERG NOK GEN PARTNERSHIP29
- 4AFTON CHEMICAL CORPORATION14
- 5SOLVAY SPECIALTY POLYMERS ITALY SPA13
See the full fluoroelastomer sealing compounds 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 fluoroelastomer sealing compounds?
One assignee leads clearly with 98 of the 265 records in scope, well ahead of fifth place at 13 and tenth place at 7. The top 5 of 61 ranked assignees together hold 186 records, or 70.2% of everything in scope, and the top 10 push that to 88.7%. This means the field is concentrated in a small number of established materials and seal manufacturers rather than spread across many small filers.
Is fluoroelastomer compounding still an active area for new patent filings?
Recorded filings peaked at 20 in 2022 and then fell sharply, from 14 in 2021 to 1 in 2024, a 93% drop over that span. Because publication typically lags filing by about 18 months, the 2025 and 2026 figures are still incomplete and should not be read as proof the field has gone quiet — but the reliable trend through 2024 does show a pull-back from the 2022 peak. New filers should expect to be working against an already well-populated base of core compound and cure claims.
What is the difference between peroxide cure and bisphenol cure claims in this space?
Both are cure-chemistry routes captured in this dataset's search terms, and both sit largely within the C08L polymer-composition class that covers 40.0% of the 265 records. Peroxide-cure systems are generally the more heavily filed route based on the composition-claim density seen here, while bisphenol-cure claims and adjacent alternatives appear in a thinner slice of the corpus, making that boundary worth checking carefully in freedom-to-operate work.
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 Fluoroelastomer Sealing Compounds 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.