RTM & Infusion Patents: Who Leads, Where the Gaps Are 2026
Resin Transfer Moulding and Infusion Patents
37.6% concentration at the top. The top 5 assignees hold 163 of the 433 records in scope, but the remaining 268 are spread across a long tail of single- and few-filing entrants. Publications ran as high as 72 in 2017. The most recent complete comparison point in the evidence is 2021 to 2024, where the leading assignee's filings moved from 16 to 11, a -31% change. Years after 2024 are still filling in and should not be read as a continued decline.
- 1EVONIK OPERATIONS GMBH54
- 2THE BOEING CO37
- 3BELL HELICOPTER TEXTRON INC33
- 4TEXTRON INNOVATIONS INC20
- 5CYTEC TECHNOLOGY CORP19
See the full resin transfer moulding and infusion 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 resin transfer moulding and infusion?
The leading assignee in this dataset holds 54 of the 433 records in scope, with the top 5 combined reaching 163 records (37.6%). That leadership is real but not overwhelming: the majority of records, 62.4%, sit outside the top 5, spread across a long tail of aerospace manufacturers, materials suppliers, universities and individual inventors. Anyone assessing freedom to operate should check both the leading assignees and this long tail, since single-filing entrants can still hold a blocking claim in a narrow sub-area.
Is patent filing in resin transfer moulding and infusion still growing?
Filing peaked in 2017 at 72 published records and has since stepped down. The one complete year-over-year comparison the data supports is 2021 to 2024, where the leading assignee’s filings fell from 16 to 11, a -31% change. Because publication lags filing by roughly 18 months, the years closest to the 2026 cut-off are still filling in and should not be read as evidence of a continued decline.
What technology areas dominate resin transfer moulding patents?
B29C, the shaping-of-plastics classification, appears on 48.0% of the 433 records in scope, making it by far the largest single category. Condensation polymers (C08G, 21.0%) and addition polymers (C08F, 14.1%) follow at a distance, with aerospace-specific B64C classification present on 10.9% of records. Because a single record can carry multiple IPC classes, these shares overlap and do not sum to 100%.
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 Resin Transfer Moulding and Infusion 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.