Low-Cost Carbon Fiber Precursor Patent Snapshot 2026
This is a small, highly concentrated field with 9 patent families in scope and Ashland Inc holding a commanding position; filing activity peaked around 2017 and has remained sparse since. The dominant technical route centers on chemical filament and fiber features (D01F), with pitch-based precursors (C10C) as the second anchor.
Ashland Inc leads a tightly held, niche corpus
Ashland Inc sits at the top of the applicant ranking with 7 patent records, followed by LG Chem Ltd with 5. The top five filers collectively account for 61% of the ranked applicants visible in this query’ combined total, signaling that a small cluster of incumbents defines the competitive terrain.
The tier gap between the leader and the rest of the field is steep: no other applicant reaches Ashland’s count, and the majority of ranked players hold only one or two patent records each. This compression at the lower tiers suggests limited broad-based commercial investment.
| # | Applicant | Patent records | Share |
|---|---|---|---|
| 1 | Ashland Inc | 7 | |
| 2 | LG Chem Ltd | 5 | |
| 3 | Industrial Technology Research Institute | 3 | |
| 4 | Amogreentech Co Ltd | 3 | |
| 5 | INDAL TECH & EQUIP | 2 | |
| 6 | Lee Wan-jin | 2 | |
| 7 | University of Wyoming | 2 | |
| 8 | Battelle Energy Alliance LLC | 2 |
| # | Applicant | Patent records | Share |
|---|---|---|---|
| 9 | Mitsui Mining Co Ltd | 1 | |
| 10 | Northeast Electric Power University | 1 | |
| 11 | Daegu Gyeongbuk Institute of Science and Technology | 1 | |
| 12 | Kawasaki Steel Corporation | 1 | |
| 13 | Dow Corning Ltd | 1 | |
| 14 | SABIC Global Technologies BV | 1 | |
| 15 | Chonnam National University Industrial Foundation | 1 |
Ashland’s dual emphasis on tar-and-pitch chemistry (C10C) and chemical fiber features (D01F) implies a vertically integrated approach to precursor development, while challengers like LG Chem and the Industrial Technology Research Institute concentrate more narrowly on fiber processing and polymer routes.
The most recent 18–24 months of filings are subject to publication lag and should be treated as under-counted; the apparent absence of records in 2024–2025 does not necessarily indicate a halt in activity. Longer-window growth, applicant concentration, and technology-route coverage are therefore more reliable signals than the latest-year bar alone.
Activity peaked in 2017 and the technology mix centers on fiber chemistry
The annual filing trend reveals a burst of activity around 2017 that faded sharply through the early 2020s, with only isolated filings in 2022 and 2023. The technology composition chart shows D01F (chemical filament and fiber features) as the visible branch, flanked by C10C (tar and pitch) and D06M (textile chemical treatment).
Annual filing trend
Five records were filed in 2017, dropping to two in 2018, then to zero for three consecutive years before isolated single-record activity in 2022 and 2023. The 2024–2025 zeros reflect publication lag and should not be read as confirmed inactivity. The overall picture is of a field that expanded sharply in 2017 and has not sustained that pace.
↗ Hover for values · click a bar to ask EurekaTechnology composition
D01F (chemical filament and fiber features) is visible in the branch mix, followed at a distance by C10C (tar and pitch) and D06M (textile chemical treatment). Polymer-related branches — C08L, C08F — and downstream application branches such as H01M (batteries) and H01G (capacitors) are each represented by only one or two records, indicating narrow but real interest in non-fiber end uses.
↗ 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.
Pitch precursor production by distillation
An improved wiped film evaporator (WFE) process for removing low molecular weight species from a hydrocarbyl mixture is disclosed, wherein partial oxidation of a hydrocarbyl mixture precedes the WFE step. Faster rates of distillation are achieved without significant deterioration of hydrocarbyl product properties. Such products can include carbon fiber… (excerpt from the patent abstract)
Open this patent in Eureka →| # | Patent | Citations |
|---|---|---|
| 1 | Apparatus and method for making carbon fibers | 68 |
| 2 | Metal oxide incorporated activated carbon nanofibe… | 49 |
| 3 | Preparation method of nano-porous carbon fibersthr… | 28 |
| 4 | Ablative and insulative structures and microcellul… | 26 |
| 5 | Apparatus and method for making carbon fibers | 20 |
| 6 | Preparation method of nano-porous carbon fibersthr… | 18 |
| 7 | Pitch precursor production by distillation | 18 |
| 8 | Carbon nanofiber composite having three layer stru… | 11 |
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.
Ashland Inc
Ashland Inc holds 7 patent records, the largest position in the corpus. Its technology emphasis spans C10C (tar and pitch) and D01F (chemical filament and fiber features) in equal measure, reflecting an integrated pitch-precursor strategy that covers both feedstock chemistry and the resulting fiber properties. No momentum trend data is available for Ashland beyond its established ranking position.
patent records: 7LG Chem Ltd
LG Chem Ltd holds 5 patent records and concentrates its filings on D01F (chemical filament and fiber features) and D06M (textile chemical treatment), suggesting a focus on surface and processing treatments rather than upstream feedstock chemistry. No momentum trend is recorded for LG Chem in the evidence, so trajectory relative to earlier periods is evidence pending.
patent records: 5Frequently asked questions
The corpus in scope contains 9 patent families. This is a niche sub-field with limited filing volume; the United States is the primary filing jurisdiction with 8 patent records, and South Korea and Europe (EPO) follow as secondary jurisdictions.
Ashland Inc leads with 7 patent records, the highest count in the corpus. LG Chem Ltd is the nearest challenger with 5 records. Together with the Industrial Technology Research Institute and Amogreentech Co Ltd (3 records each), the top four applicants hold the majority of documented activity.
D01F (chemical filament and fiber features) is the visible branch, followed by C10C (tar and pitch) and D06M (textile chemical treatment). Ashland’s portfolio is notable for straddling both D01F and C10C, reflecting its pitch-based precursor focus.
Filing activity peaked at 5 records in 2017, dropped to 2 in 2018, and has been near-zero since, with isolated single records in 2022 and 2023. The most recent years carry publication lag and should be treated as under-counted. The pattern suggests the field has not sustained the interest level of its 2017 peak.
The evidence shows only a single co-filing linkage, between two records attributed to variant names of Dow Corning Ltd, which reflects a name-variant rather than a genuine cross-organization partnership. No industry-academic or cross-company co-filing pairs are documented, indicating an absence of consortium-style R&D programs.
D01D (man-made filament spinning, 3 records) and C08F (addition polymers including vinyl and acrylate chemistries, 2 records) are the two sparsest branches with direct technical relevance to low-cost precursor development. C08L (polymer compositions, 3 records) and C01F (alkaline-earth and rare-earth compounds, 2 records) are additional under-served areas observed in the whitespace analysis.
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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.
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