Metallic & Spiral Wound Gaskets Patents: Top Filers & Trends 2026
Metallic and spiral wound gasket patents: who holds the ground and where it's still open
47.1% concentration at the top. The top 5 of 344 records account for 162 filings — a leader at 57 records with a steep drop to a long tail of single- and few-filing entrants. Filings rose from 6 in 2017 to a peak of 19 in 2019, then declined; 2021's 17 filings fell to 4 by 2024, a -76% move over that span. 2025 and 2026 are still filling in, since publication typically lags filing by roughly 18 months.
- 1FLEXITALLIC INVESTMENTS INC57
- 2BRILLIANT LIGHT POWER INC34
- 3NIPPON PILLAR PACKING CO LTD32
- 4GARLOCK SEALING TECHNOLOGIES LLC28
- 5LGC US ASSET HOLDINGS LLC11
See the full metallic and spiral wound gaskets 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 spiral wound and metallic gasket technology?
Filing in this space is concentrated: the top-ranked assignee holds 57 of the 344 records in scope, and the top 5 assignees combined account for 47.1% of all records. The ranked list covers 100 companies total, drawn from established sealing manufacturers alongside a long tail of single- or few-filing entrants. This concentration means a competitive-intelligence review should focus first on the handful of leaders before scanning the tail for niche claims.
Is patent filing activity for metallic gaskets increasing or declining?
Filing peaked at 19 records in 2019 and has since declined, falling from 17 in 2021 to 4 in 2024 — a -76% move over that three-year span. That said, 2025 and 2026 figures are still incomplete because publication typically lags filing by roughly 18 months, so the most recent years understate true filing activity. The safest reading is that claim space around core constructions has matured rather than that interest in the technology has disappeared.
What does a spiral wound gasket patent typically claim?
Core claims in this dataset cover the winding construction itself — alternating metal strip and filler material — plus the filler material composition, surface treatment of the filler tape, and the resulting seating-stress and relaxation behaviour under flange bolt load. A representative filing, US20030193147A1, claims a graphite filler material produced by blast-treating a high-density surface off an expansive graphite tape before winding it into the gasket. Filings also extend into fugitive-emission test methods and flange face finish requirements, reflecting regulatory testing alongside the mechanical design.
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 Metallic and Spiral Wound Gaskets 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.