Room Temperature Vulcanizing Silicone Sealant Patents: Who Leads and Where Claims Cluster
Concentrated at the top. The top 5 assignees hold 50.9% of all 289 records in scope, and the top 10 hold 72.3% — a narrow group has shaped most of the claim space. Filings peaked at 33 in 2019, dipped through the low single digits by 2021, then climbed from 2 in 2021 to 8 in 2024 — a +300% rise over that three-year window. The 2025–2026 figures are still incomplete due to publication lag and should not be read as a falling trend.
- 1DOW SILICONES CORP79
- 2MEDTRONIC MINIMED INC19
- 3DOW GLOBAL TECHNOLOGIES LLC17
- 4SIKA TECH AG16
- 5GENERAL ELECTRIC CO16
See the full room temperature vulcanizing silicone sealants 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 RTV silicone sealant patents
What is the difference between oxime cure and alkoxy cure RTV silicone sealants in patent terms?
Oxime cure and alkoxy cure describe the byproduct chemistry released as a one-part RTV silicone sealant hardens on exposure to atmospheric moisture. Patent claims in this dataset distinguish the two because they affect substrate adhesion, odour, corrosion of adjacent metals, and cure speed, so a formulation claim usually specifies which cure chemistry and which catalyst system it depends on. The representative filing in this dataset, US5519104A, is built specifically around alkoxy cure with a dual dibutyltin catalyst system aimed at extending tooling time without hurting cured properties. Reviewing which cure chemistry a competitor has claimed is usually the fastest way to see whether a new formulation sits inside or outside their protection.
Who are the leading patent filers in room temperature vulcanizing silicone sealants?
This dataset ranks 73 companies by patent family count, with the leading assignee holding 79 of the 289 records in scope and a steep drop to 16 records at fifth place and 10 at tenth. The top 5 assignees combined account for 50.9% of all records, and the top 10 combined account for 72.3%, so ownership is concentrated among a small group of large silicone and adhesives formulators rather than spread evenly. Recent-year momentum for the top-ranked assignees shows 0 filings in the latest tracked year across several of them, which is consistent with publication lag rather than a genuine pullback. Anyone assessing competitive position should treat the ranked list as the current owners of claim space, not a static picture.
Is patent filing activity in RTV silicone sealants growing or shrinking?
Filing activity peaked at 33 records in 2019, fell through the early 2020s, and then rose again from 2 records in 2021 to 8 in 2024 — a +300% increase over that three-year span. Because publication typically lags actual filing by around 18 months, the 2025 and 2026 figures in this dataset are still incomplete and should not be read as evidence of a slowdown. The 2021–2024 rebound is the most reliable recent signal available and suggests renewed interest in the space rather than a mature, declining field. Watching who files in the next reporting window will clarify whether this rebound continues.
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 Room Temperature Vulcanizing Silicone Sealants 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.