GFRP Additives & Fillers Patent Landscape 2026
The GFRP additives and fillers patent space is led by a small cluster of specialty materials firms — Johns Manville and Owens Corning together anchor the top tier — with China now the dominant filing jurisdiction. Annual volume peaked in 2020 and has since eased, indicating a field that has passed its rapid-growth phase though the most recent two years remain subject to publication lag.
Johns Manville leads a moderately concentrated field
Johns Manville Corp holds the top position, followed closely by Owens Corning Intellectual Capital LLC in second place, with Georgia Pacific Chem LLC third. The top five filers account for 29% of the combined output of the hundred largest filers, signaling moderate concentration rather than monopoly control.
A clear two-tier structure exists: the top two applicants are meaningfully ahead of the third, and the field drops off quickly beyond the top five. This gap suggests that the leading pair have built portfolio depth that would be costly for challengers to replicate quickly.
| # | Applicant | Patent records | Share |
|---|---|---|---|
| 1 | Johns Manville Corporation | 38 | |
| 2 | Owens Corning Intellectual Capital LLC | 35 | |
| 3 | Georgia-Pacific Chemicals LLC | 18 | |
| 4 | Guangdong Shengyi Sci Tech Co., Ltd. | 14 | |
| 5 | Olain Zia D | 14 | |
| 6 | Johns Manville International Inc. | 10 | |
| 7 | Ma’anshan Huaneng Electric Power Line Equipment Co., Ltd. | 10 | |
| 8 | Owens Corning Fiberglas Corporation | 9 | |
| 9 | Kraton Polymers US LLC | 8 | |
| 10 | Ferro Corporation | 8 |
| # | Applicant | Patent records | Share |
|---|---|---|---|
| 11 | Phillips Petroleum Company | 8 | |
| 12 | Occidental Chemical Corporation | 7 | |
| 13 | Cargill Incorporated | 7 | |
| 14 | Shenzhen Keju New Material Co., Ltd. | 7 | |
| 15 | Basell Poliolefine Italia S.r.l. | 6 | |
| 16 | Ciba Specialty Chemicals Holding Inc. | 6 | |
| 17 | Meng Yu | 5 | |
| 18 | Akzo Nobel N.V. | 5 | |
| 19 | Shanghai Pret Composites Co., Ltd. | 5 | |
| 20 | EcoSynthetix Inc. | 5 |
The positions of Johns Manville and Owens Corning — both rooted in glass fiber sizing chemistry — imply that surface-treatment formulations and coupling-agent chemistry remain the most heavily defended technical ground. New entrants are more likely to find room in adjacent processing or end-use branches than in core sizing additives.
Filing data for 2025 and 2026 are incomplete due to standard patent publication delays of 18–24 months; apparent low counts in those years reflect lag, not a confirmed further decline. Longer-window growth, applicant concentration, and technology-route coverage are therefore more reliable signals than the latest-year bar alone.
A 2020 filing peak followed by easing volume; additive-use chemistry dominates the technology mix
Two views of the corpus reveal both the temporal shape of competitive activity and the technical branches receiving the most attention. Together they show where the field has been concentrated and where it remains thinner.
Annual filing trend
Filings rose from 31 in 2017 to a peak of 39 in 2020, then declined sharply through 2022–2023. A partial recovery appears in 2024–2025, though those years are underrepresented due to publication lag and should not be read as a confirmed rebound. The 2020 peak likely reflects pandemic-era supply-chain interest in domestic materials innovation.
↗ Hover for values · click a bar to ask EurekaTechnology composition
C08K (use of additives in polymers) and C08L (polymer compositions) together account for the largest share of IPC records, confirming that formulation chemistry is the dominant technical focus. Processing-oriented branches — B29C (shaping of plastics) and C08J (polymer processing) — appear at lower but meaningful levels, while end-use branches such as H05K (printed circuits), E04B (building structures), and F16L (pipes) are present but sparse, indicating that application-specific filings remain an under-served area relative to materials chemistry.
↗ 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.
Flame retardant coatings
Provided are flame retardant coating compositions and articles coated therewith, which compositions comprise (A) a coating and (B) an effective flame retarding amount of a mixture of (i) at least one compound selected from the group consisting of the (a) sterically hindered nitroxyl stabilizers, (b) sterically hindered hydroxylamine stabilizers and (c)… (excerpt from the patent abstract)
| # | Patent | Citations |
|---|---|---|
| 1 | Luminescent gel coats and moldable resins | 390 |
| 2 | Flame retardant coatings | 210 |
| 3 | Odor free molding media having a polycarboxylic ac… | 142 |
| 4 | Formaldehyde free insulation binder | 137 |
| 5 | Surfactant-containing insulation binder | 116 |
| 6 | Products useful as roof shingles and a process for… | 115 |
| 7 | Intumescent fire retardant composites | 115 |
| 8 | Antimicrobial fiberglass reinforced plastic compos… | 110 |
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.
What the structure means for R&D investment decisions
Four structural dimensions — maturity, concentration, collaboration, and geography — each carry distinct implications for teams deciding where to direct resources in GFRP additives and fillers.
Post-peak field with selective room for differentiation
The lifecycle evidence classifies this field as Decline, with annual filings easing back from the 2020 peak. This does not mean the technology is exhausted, but it does mean that broad foundational claims are largely occupied. R&D investment is most defensible in narrow, application-specific formulations or in processing branches that remain comparatively sparse.
Lifecycle: DeclineModerate top-tier concentration; mid-tier remains accessible
The top five filers hold 29% of the hundred largest filers’ combined output, and the leading pair — Johns Manville and Owens Corning — are meaningfully ahead of the rest. Below rank five, the field fragments quickly across specialty chemical firms and Chinese industrial players. This mid-tier fragmentation means there is no single blocking portfolio outside core sizing chemistry, and targeted filings in adjacent branches can establish a credible position.
Concentration: ModerateMinimal co-filing activity; largely independent portfolios
The evidence shows only two co-filing relationships: Johns Manville International Inc with Rohm and Haas Company (two joint filings), and Owens Corning Intellectual Capital LLC with Cargill Inc (one joint filing). The near-absence of collaboration suggests that most players treat this as proprietary formulation territory rather than a pre-competitive space — a signal that licensing or partnership approaches may be underused and potentially negotiable.
Collaboration: LowChina leads filing volume; US and EPO remain important validation markets
China is the leading filing jurisdiction by patent records, followed by the United States and Europe (EPO). WIPO (PCT) and Canada also appear at meaningful levels, indicating that leading applicants are seeking broad international coverage. Japan and South Korea, both significant GFRP manufacturing bases, show relatively low filing counts — a potential gap worth monitoring for freedom-to-operate assessments.
Lead Office: ChinaGo beyond the landscape: Eureka’s TRIZ Solution agent breaks down an R&D problem and returns patented concept solutions, each with a technical approach and cited patent & literature evidence.
| Applicant | Collaborator | Co-filings |
|---|---|---|
| Johns Manville International Inc. | Rohm and Haas Company | 2 |
| Owens Corning Intellectual Capital LLC | Cargill Incorporated | 1 |
Co-filing pairs, ranked by the number of jointly-filed patent families.
Johns Manville and Owens Corning anchor the field; Chinese industrials are rising in the mid-tier
The two heritage glass-fiber specialists hold the top two positions by patent records and share a common focus on C08K additive chemistry, though their secondary emphases differ. Below them, a diverse mid-tier of chemical companies and Chinese industrial firms operates across narrower technical niches.
Johns Manville Corp
Johns Manville Corp holds the leading position with 38 patent records, concentrated in C08K 5 (additive use in polymers), C08K 7, and C03C 25 (glass and enamel compositions) — a portfolio that spans both organic sizing chemistry and glass surface treatment. The entity Johns Manville International Inc contributes an additional 10 patent records with complementary focus in nonwovens and printed-circuit applications. Momentum data flags the consolidated Johns Manville entity as a new entrant in the recent filing window, suggesting portfolio activity may be shifting between legal entities rather than declining.
patent records: 38Owens Corning Intellectual Capital LLC
Owens Corning Intellectual Capital LLC is the second-ranked applicant with 35 patent records, focused on C08K 5 and C08K 9 (surface-treated additives) and D06M 15 (textile chemical treatment) — indicating a stronger emphasis on fiber surface chemistry and sizing agents relative to Johns Manville. The legacy Owens Corning Fiberglas Corp entity contributes a further 9 patent records weighted toward C03C 25 and polymer processing. No recent-window momentum data is available for Owens Corning, so trajectory is evidence pending.
patent records: 35| Applicant | Recent (3 yrs) | Trend |
|---|---|---|
| Johns Manville Corporation | 4 | ▲ new entrant |
Under-served branches adjacent to the dominant additive-chemistry core
Several IPC branches appear at lower relative share within this corpus despite having clear technical relevance to GFRP composites. These are observations of relative sparsity; they warrant further freedom-to-operate and prior-art investigation before being treated as investment targets.
B29C · Shaping of plastics — processing-integrated additive delivery
B29C appears at a lower share of the corpus despite being the natural home for in-process additive incorporation during molding and extrusion. The sparsity suggests that most applicants are filing additive compositions under C08K/C08L rather than claiming the process-additive interaction in B29C. For teams working on reactive or in-situ filler systems, this processing branch may offer less crowded claim space — though a targeted prior-art search is essential before drawing conclusions.
Search this in Eureka →C03C · Glass & enamel compositions — glass fiber surface chemistry
C03C records glass and enamel composition work including glass fiber surface sizing, yet it is a lower-share branch relative to the polymer-side additive branches. Given that fiber-matrix interfacial chemistry is a primary driver of GFRP mechanical performance, this relative sparsity in C03C — particularly at the glass surface treatment level — may represent an area where targeted sizing-chemistry filings could complement or differentiate from existing C08K-heavy portfolios. Entry path would likely require expertise in inorganic surface chemistry and silane coupling agents.
Search this in Eureka →How leading applicants differ across technical routes
Route coverage across the main technology branches in the current evidence set.
| Player | C08K 7 · Use of additives in polymers | C08K 3 · Use of additives in polymers | C08K 5 · Use of additives in polymers | C08K 13 · Use of additives in polymers | C08J 5 · Polymer processing & solutions |
|---|---|---|---|---|---|
| Johns Manville Corporation | Strong · 24 | Moderate · 6 | Strong · 29 | Absent | Absent |
| Ma’anshan Huaneng Electric Power Line Equipment Co., Ltd. | Strong · 10 | Strong · 9 | Strong · 10 | Strong · 10 | Absent |
| Owens Corning Intellectual Capital LLC | Moderate · 10 | Absent | Strong · 22 | Absent | Absent |
| Occidental Chemical Corporation | Strong · 6 | Strong · 6 | Strong · 7 | Strong · 6 | Absent |
| Guangdong Shengyi Sci Tech Co., Ltd. | Absent | Strong · 13 | Strong · 7 | Absent | Moderate · 4 |
| Georgia-Pacific Chemicals LLC | Strong · 10 | Absent | Strong · 7 | Absent | Moderate · 5 |
| Owens Corning Fiberglas Corporation | Strong · 6 | Absent | Strong · 7 | Absent | Strong · 9 |
Frequently asked questions
The corpus contains 213 patent families in scope. Patent-record counts across jurisdictions and IPC branches exceed this total because a single family can be filed in multiple offices and classified under multiple IPC codes.
Johns Manville Corp holds the leading position with 38 patent records, ahead of Owens Corning Intellectual Capital LLC with 35 patent records. Both are heritage glass-fiber specialists with deep coverage in C08K additive-use chemistry.
The evidence classifies the field as Decline, with annual filings easing back from the 2020 peak of 39 filings. This indicates the field has passed its rapid-growth phase; however, 2024 and 2025 data are subject to publication lag and should be interpreted with caution.
China is the leading filing jurisdiction by patent records, followed by the United States and Europe (EPO). WIPO (PCT) and Canada also appear at meaningful levels, reflecting broad international coverage strategies among top applicants.
The most-cited work covers luminescent gel coats and moldable resins (390 citations), flame retardant coatings (210 citations), odor-free molding media using polycarboxylic acid binders (142 citations), and formaldehyde-free insulation binders (137 citations). These represent foundational formulation and functional-property claims.
B29C (shaping of plastics, covering processing-integrated additive delivery) and C03C (glass and enamel compositions, covering fiber surface sizing chemistry) show lower relative filing share within this corpus. Both have plausible technical relevance to GFRP performance, but any entry strategy should begin with a targeted freedom-to-operate search.
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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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