Liquid Silicone Rubber Injection Molding Patents: Top Companies & Trends 2026
Liquid Silicone Rubber Injection Molding Patents: Who Leads and Where Filing Is Heading
Concentrated at the top. the five leading assignees together hold 31.3% of all 1,235 records in scope, and the top ten hold 40.5% — well ahead of a long tail of single- and few-filing entrants. Filings rose to 68 records in 2019, the high point of the window, then declined; the documented move from 55 records in 2021 to 13 in 2024 is a -76% change over three years. The 2025 and 2026 counts are still incomplete because publication typically lags filing by about 18 months, so the most recent years should not yet be read as a continued decline.
- 1DOW SILICONES CORP13.0%
- 2SHIN ETSU CHEMICAL CO LTD7.2%
- 3FUJIFILM BUSINESS INNOVATION CORP4.2%
- 4RTX CORP3.5%
- 5CANON KK3.5%
See the full liquid silicone rubber injection molding 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 this landscape
Who holds the most patents in liquid silicone rubber injection molding?
One assignee leads the ranked field with 160 records, well ahead of the fifth-ranked assignee at 43 and the tenth-ranked at 19. The top five assignees combined hold 31.3% of all 1,235 records in scope, and the top ten hold 40.5%, showing a field that is concentrated at the top with a long tail of smaller filers below it. This concentration means a new entrant is filing against occupied claim space at the top of the ranking, not into an open field.
Is patent filing in this field growing or shrinking?
Filing peaked at 68 records in 2019 and has since pulled back, with a documented -76% move from 55 records in 2021 to 13 in 2024. That three-year span is the last one that can be treated as a complete picture, because publication typically lags filing by around 18 months, so 2025 and 2026 counts are still filling in. Read the recent slowdown as real but not necessarily final until later filing years finish publishing.
What technology areas dominate the patent claims?
Polymer-composition claims under IPC class C08L cover 30.0% of the 1,235 records, the single largest class, closely followed by shaping-of-plastics claims under B29C at 26.8%. Additive claims (C08K, 20.7%) and condensation-polymer claims (C08G, 15.0%) trail those two. Because a single record can carry several IPC classes, these shares add up to more than 100% and should be read as overlapping claim coverage rather than mutually exclusive categories.
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 Liquid Silicone Rubber Injection Molding 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.