Hydrogen & Cryogenic Seal Patents: Leaders, Trends & Gaps 2026
Hydrogen and Cryogenic Sealing Patents: Who Holds the Ground
81.6% concentration at the top. The top five assignees combine for 31 of 38 records in scope — filing here is dominated by a small set of incumbents, not a fragmented field. Filing activity climbed to 19 records in 2017, the peak year in the dataset, and has trailed off since. Treat the final one or two years as undercounted rather than as a genuine drop-off, since publication typically lags filing by around 18 months.
- 1BOEHRINGER INGELHEIM ANIMAL HEALTH USA INC31.6%
- 23M CO18.4%
- 3MERIAL LTD13.2%
- 4BOEHRINGER INGELHEIM VETMEDICA GMBH13.2%
- 5KURARAY CO LTD5.3%
See the full sealing solutions for hydrogen and cryogenic service 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 are the leading patent holders in hydrogen and cryogenic sealing technology?
Filing in this dataset is concentrated at the top: the leading assignee holds 12 of the 38 records in scope, and the top five assignees together account for 81.6% of all records. The top ten combine for 94.7%, leaving very little activity outside a small, ranked group of 12 companies. This means a new entrant is filing directly against a dense existing position held by a handful of firms rather than into a fragmented field.
Why did hydrogen and cryogenic seal patent filings peak in 2017 and then decline?
The dataset shows 19 filings in 2017, the highest single year on record, followed by a steady decline through to 2026. Part of that apparent drop is real, but part of it is an artefact of publication lag: patent publication typically trails filing by around 18 months, so the most recent one to two years in any trend understate actual filing activity. Treat the 2024-2026 figures as a floor rather than the true current pace.
What chemistry underlies the most influential patents in this field?
The three most-cited records in this corpus all relate to poly(perfluoroalkylene oxide) compounds, materials prized for low-temperature stability and solvent resistance — properties directly relevant to cryogenic sealing. The top-cited record alone has drawn 958 citations. This tells you the field’s technical foundation is fluorochemical materials science rather than mechanical seal geometry, even though the search terms used to build this dataset targeted mechanical test conditions like helium leak testing and pressure cycling.
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 Sealing Solutions for Hydrogen and Cryogenic Service 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.