GFRP Cure & RTM Process Control Patent Snapshot
The patent corpus for GFRP cure and RTM process control is extremely small, with only 2 patent families in scope and filing activity concentrated in isolated years. Riverwood International Corp dominates the applicant ranking by a wide margin, while the broader IPC mix suggests the corpus as currently bounded captures adjacent packaging and board-forming art rather than dedicated RTM cure-control technology.
Riverwood International Corp leads a highly concentrated, minimal corpus
Riverwood International Corp holds the top position in the applicant ranking with 9 patent records, accounting for the entirety of meaningful volume in the top-four filers. The corpus contains only 2 patent families in scope, indicating either a very narrow search definition or a genuinely under-patented niche.
The top five filers account for 100% of the combined total across the ranked applicants visible in this query, confirming extreme concentration with no dispersed long tail of secondary filers. The gap between the leader at 9 patent records and all challengers at 1 patent record each is stark.
| # | Applicant | Patent records | Share |
|---|---|---|---|
| 1 | Riverwood International Corp | 9 | |
| 2 | Suzhou Hongjiu Aviation Thermal Materials Tech Co., Ltd. | 1 | |
| 3 | Graphic Packaging International LLC | 1 | |
| 4 | Citius Composites Pte Ltd | 1 |
The leader’s position, rooted in B27N particle/fibre board classifications, suggests its patents address fibre-composite forming broadly rather than RTM cure-cycle control specifically. This implies the RTM process control niche remains largely unoccupied by dedicated patent portfolios.
Filings from the most recent 18–24 months are likely under-represented due to standard patent publication lag; absence of recent records should not be read as a market exit or field closure. Longer-window growth, applicant concentration, and technology-route coverage are therefore more reliable signals than the latest-year bar alone.
Sparse, episodic filing history with a mixed technology composition
Annual filing activity shows isolated single-record years in 2018 and 2024, with no sustained growth trend detectable from the available data. The IPC composition spans shaping of plastics, fibre board, food science, and control systems, pointing to a heterogeneous corpus that only partially overlaps with core RTM process-control technology.
Annual filing trend
Only two filing years register any activity over the observed window — 2018 and 2024 — each with a single record. No multi-year growth trajectory is visible; the lifecycle stage cannot be determined from this data. Treat recent years as potentially under-counted due to publication lag.
↗ Hover for values · click a bar to ask EurekaTechnology composition
B29C (Shaping of plastics) and B27N (Particle/fibre board) are visible in the IPC mix, together covering the bulk of records. G05B (Control and regulating systems) appears with a single record, representing the closest proxy to dedicated process-control art. Food-science classes (A23K, A23L) and polysaccharide chemistry (C08B) are present at one record each and are likely noise from broad search retrieval.
↗ Hover for values · click a bar to ask EurekaHighly cited patent families surfaced by the query
Citation-heavy patent families returned by the query. Use this section as citation context, not as a curated list of the most topic-specific patents.
Method for forming articles of reinforced composit…
A method for producing articles comprised of reinforced composite materials including primarily wood or cellulosic fiber and plastic is disclosed.. The wood fibers are comminuted to substantially a specific thickness and classified according to length. Plastic is comminuted and mixed with wood fibers to form a reinforced composite mixture in predetermined… (excerpt from the patent abstract)
| # | Patent | Citations |
|---|---|---|
| 1 | Method for forming articles of reinforced composit… | 117 |
| 2 | Method for forming articles of reinforced composit… | 11 |
| 3 | Method for forming articles of reinforced composit… | 2 |
Ranked by total forward citations. Citation counts favour older and broadly cited patent families, and broad or adjacent patents may appear when they match the search scope. Treat this section as citation context, not as a curated list of the most topic-specific patents. Some patent titles may be shown in their original, non-English language where an accurate translation could not be guaranteed.
Assignee snapshot from the current evidence set
The applicants below are visible in this query result. Because the evidence set is relatively small, read this section as a directional snapshot rather than a full competitive ranking.
Riverwood International Corp
Riverwood International Corp holds 9 patent records, the highest in the ranked corpus, with technology emphasis concentrated in B27N particle/fibre board classifications. Its filings cover B27N 1, B27N 3, and B27N 5 subclasses, pointing to fibre-composite board-forming methods rather than RTM cure-cycle control specifically. No recent momentum data is available for this entity.
9 patent recordsCitius Composites Pte Ltd
Citius Composites Pte Ltd holds 1 patent record and is flagged as a new entrant with an upward trajectory. Its technology focus spans B29C 70 (shaping of plastics — reinforced composites), A23K 10, and A23L 33, an unusual combination that warrants further review of the actual claims scope. Its emergence in the most recent active filing year (2024) makes it the only player signalling fresh activity in this space.
1 patent record · new entrantFrequently asked questions
The current evidence shows 2 patent families in scope. This is a very small corpus, and the actual body of relevant global patents may be larger depending on search scope, IPC class selection, and keyword definitions used.
Riverwood International Corp leads with 9 patent records in the applicant ranking. Its technology emphasis is in B27N particle/fibre board subclasses rather than dedicated RTM cure-cycle control.
Citius Composites Pte Ltd is flagged as a new entrant with 1 patent record in the most recent active filing year. No other applicants show recent momentum in the current evidence.
Finland is the lead office with 3 patent records, followed by Australia and Europe (EPO) at 2 each, and single records in Canada, China, India, the United States, and WIPO (PCT).
G05B (Control and regulating systems), specifically subclass G05B 19, is the most directly relevant class for cure-cycle automation and closed-loop RTM control. It appears in only 1 patent record in the current corpus, suggesting the niche is underrepresented in this search boundary.
Classes A23K, A23L, and C08B each appear with 1 patent record and are most likely retrieval artefacts resulting from broad keyword or classification overlap rather than genuine GFRP RTM technology. They should be treated as noise until claim-level review confirms relevance.
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Disclaimer. This page is generated from Patsnap Eureka data drawn from a limited snapshot of global patent and scientific-literature records, and is provided for general information and reference only.
Patent data carries inherent limitations: recent filings (typically the most recent 18–24 months) are under-counted due to standard publication lag; counts may be reported at either a patent-family or a patent-record basis and are not always directly comparable; classification, applicant-name, and citation data may contain errors, duplicates, or omissions; and the underlying search query defines and constrains the scope shown. As a result, the analysis may be incomplete or inaccurate and may not reflect the full technology landscape.
Nothing on this page constitutes an exhaustive prior-art, novelty, freedom-to-operate, or validity search, nor does it constitute legal, financial, investment, or professional advice, and it should not be relied upon as such. Any patent, commercial, or strategic decision should be verified independently and reviewed with qualified patent, legal, and domain professionals. Patsnap makes no warranties, express or implied, as to the accuracy, completeness, or fitness for any particular purpose of the information presented.