PMMA Optical Grade Polymers Patents: Leaders & White Space 2026
- Filing has cooled since its 2020 peak. 53 families that year against 9 recorded so far in the most recent partial year, with 2022's 36 marking the flat midpoint of the decline.
- Impact modification is the most contested ground. C08L polymer-composition filings (903 records) dwarf every other IPC subclass, and the two most-cited patents in the corpus are both impact-modifier disclosures.
- China now receives more filings than the next two offices combined. 360 China filings sit well ahead of Japan's 166 and the United States' 134, marking where enforcement and freedom-to-operate checks matter most.
Filing growth compares 2021 (42 records) with 2024 (28) — a three-year span. 2024 is the most recent year we treat as complete: publication lags filing by roughly 18 months, so 2025 onwards are still filling in and any growth rate that ends there would understate the field. Top-5 share is the combined record count of the five largest assignees divided by all 1,106 records in scope (CR5), not by the ranked leaders only.
What the filing record shows
PMMA optical grade polymer patents cluster around one persistent engineering problem: acrylic is optically excellent but brittle, and every generation of filings tries to fix that without sacrificing light transmission or weather resistance. The dataset spans 1,106 patent families filed against IPC classes covering addition polymers, polymer compositions and optical elements, with activity concentrated in impact modification, bulk polymerization control, and multilayer optical constructions.
Filing volume rose through the late 2010s, peaked in 2020, and has since declined toward the level last seen at the start of the dataset — a pattern consistent with a technology whose core claim space is largely staked out rather than one still being actively opened.
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Filing trend and technology composition
Two views of the same 1,106-family dataset: how filing activity has moved year over year, and how it splits across the IPC subclasses that define this space.
A peak already behind us
Filings climbed from 32 in 2017 to a peak of 53 in 2020, held near the 2022 midpoint of 36, and have fallen to 9 in the most recent partial year. Because publication typically lags filing by around 18 months, the final year or two will fill in somewhat — but the multi-year decline from the 2020 peak predates that lag effect.
Composition claims dominate the classification mix
C08L polymer-composition claims appear in 903 of the 1,106 records, more than double the next largest class (C08K additives at 408). G02B optical-elements filings (132) and B32B laminate filings (112) are comparatively thin, marking the classes with the least filing pressure relative to the core chemistry.
Shares are the percentage of the 1,106 records in scope. A patent can carry several IPC classes, so the shares add up to more than 100%.
Go deeper on PMMA Optical Grade Polymers with Eureka
This page is one run against one query. Ask Eureka your own question about pmma optical grade polymers and every answer comes back with the patent numbers behind it.
Try EurekaThe citation backbone of this field
NZ532500A — Impact-modified polymethyl methacrylate and its preparation
The filing discloses a plastic moulding made from an impact-resistant PMMA-based polymer, obtained by polymerizing a mixture of 65-99.5% methyl methacrylate with an unsaturated carboxylic acid, an impact modifier at 0.5-35% by weight, a crosslinker, a stabilizer, an initiator, a release agent and a regulator, each held within a narrow specified weight range.Assignee and filing date are rendered above; the claim structure is what matters for freedom-to-operate review.
View full record| # | Publication no. | Patent title | Citations |
|---|---|---|---|
| 1 | US3847865A | Use of alumina trihydrate in a polymethyl methacrylate article | 224 |
| 2 | EP0522351A1 | Impact modifier | 163 |
| 3 | WO2006077153A2 | Thermoset materials with improved impact resistance | 121 |
| 4 | US4745029A | Transparent blends of polymethyl methacrylate and BPA polycarbonate | 99 |
| 5 | US5270397A | Material for modifying impact resistance | 85 |
| 6 | US5753362A | Acrylic sheet, acrylic adhesive sheet and processes for preparing the sheets | 84 |
| 7 | US20070055017A1 | Polymer blend for matte injection moulded parts | 83 |
| 8 | US6362271B1 | Polyvinylidene fluoride weather resistant coating compositions including polymethyl methacrylate | 83 |
| 9 | US4743654A | Single phase blends of polycarbonate and polymethyl methacrylate | 70 |
| 10 | US20040030046A1 | Pmma moulding compounds with improved impact resistance | 60 |
Citation counts reflect influence within the searched corpus and skew toward older filings; they are not a measure of current commercial weight.
Each row carries its publication number; clicking a row searches Eureka by that number.
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Browse MCP servers →What the data means for a filing decision
Four patterns in the dataset that bear directly on where a new filing is likely to clear and where it is likely to collide with prior art.
Composition claims are the densest ground
Polymer-composition claims (C08L) appear in the large majority of records in this corpus, meaning most new filing attempts in that class will need to work around an already-crowded prior-art base rather than open new ground.
Impact-modifier disclosures anchor the field
The two most-cited records in the dataset are both impact-modifier patents, one filed decades before optical-grade PMMA became a distinct commercial category. New impact-modifier claims sit downstream of a long, well-cited lineage.
The growth phase has passed
Filing activity peaked in 2020 and has fallen sharply since, including among the assignees with the largest historical portfolios, several of which show no filings at all in the latest recorded year.
China is the primary filing venue
China's 360 filings lead Japan (166), the United States (134) and EPO (130) by a wide margin, which shifts where clearance searches and opposition risk should be weighted first.
Eureka can read the same corpus for gaps instead of for coverage: under-claimed branches adjacent to pmma optical grade polymers, with the prior art for and against each one.
Who holds the ground, and where it is open
A small group of chemicals majors carries the historical filing weight in this space, but recent-year activity has gone quiet across the board — including for the largest historical filers — which changes how a new entrant should read the competitive picture.
Collaboration is limited and concentrated
Only ten co-assignee pairings appear in the dataset, and the strongest of them links a single chemicals major with one collaborator across four joint filings — collaborative filing is the exception here, not the norm.
The largest historical filers have gone quiet
Every assignee with substantial historical volume in this corpus shows zero filings in the most recent recorded year, consistent with the broader decline from the 2020 peak rather than any single company stepping back.
Activity is broad but composition-heavy
The 1,106 families spread across eight IPC subclasses, from addition polymers to optical elements, but the bulk of that spread is concentrated in composition and additive classes rather than in optical-element or laminate claims.
| Assignee | Recent year | YoY |
|---|---|---|
| Röhm GmbH | 0 | — |
| Arkema France | 0 | — |
| Mitsubishi Rayon Co., Ltd. | 0 | — |
| Sekisui Chemical Co., Ltd. | 0 | — |
| LG Chem, Ltd. | 0 | — |
| Evonik Operations GmbH | 0 | — |
| SABIC Global Technologies B.V. | 0 | — |
| SHPP Global Technologies B.V. | 0 | — |
Where to take this analysis
The trend and assignee data point to a mature, composition-dominated field with a specific set of thinner branches. The next step is narrowing that down to a defensible filing position.
Map your formulation against the composition art
With 903 of 1,106 records touching C08L, any new impact-modifier or composition claim needs a close read against the most-cited records before drafting.
Run a claim comparison in Eureka →Check the thinner IPC branches for freedom to operate
G02B optical-element and C08G condensation-hybrid claims carry far lower filing density than the core composition classes and merit a dedicated search.
Search white space in Eureka →Track assignee momentum before committing R&D spend
Zero recent-year filings from the historically largest assignees may signal either consolidation or a pause — worth confirming before assuming the field is fully staked out.
Monitor assignee activity in Eureka →Common questions on PMMA optical grade polymer patents
The dataset's historical filing weight sits with a small group of established chemicals majors that have filed across impact modification and polymer composition for years. However, every one of the assignees with substantial historical volume shows zero filings in the most recent recorded year, so current leadership by volume does not necessarily indicate current leadership by activity. Anyone assessing competitive position should weight recent-year filings, not just cumulative totals.
Filings peaked at 53 in 2020, held near 36 at the 2022 midpoint, and dropped to 9 in the latest partial year, a pattern more consistent with claim space becoming saturated than with a shrinking market. Because publication lags filing by roughly 18 months, the final one to two years of the trend will revise upward somewhat as later-filed applications publish. Even accounting for that lag, the multi-year decline from the 2020 peak is a real signal that the core composition and impact-modifier claim space is largely occupied.
The clearest thinner ground sits in multilayer optical laminate constructions (B32B, 112 records), optical-element integration claims (G02B, 132 records), and condensation-polymer optical hybrids (C08G, just 39 records) — all far behind the 903 records touching core polymer-composition claims. A first filing in these branches faces a shallower prior-art base than one competing directly on impact-modifier composition. That said, thin filing density in a branch can also reflect limited commercial pull, so any white-space claim should be checked against demand as well as prior art.
NZ532500A claims an impact-modified PMMA moulding made by polymerizing methyl methacrylate (65-99.5%) with a specified range of unsaturated carboxylic acid, an impact modifier (0.5-35%), a crosslinker, a stabilizer, an initiator, a release agent and a regulator, each within its own narrow weight-percentage band. A formulation that falls within all of those concentration ranges and includes each listed component is likely to be read as within scope; one that omits a component, uses a materially different weight range, or substitutes a different modifier chemistry has a stronger design-around argument. Any freedom-to-operate opinion should compare the specific weight ranges claimed against the formulation under review rather than relying on the general concept of impact-modified PMMA, which predates this filing.
China leads with 360 filings in this dataset, well ahead of Japan (166), the United States (134) and the EPO (130), so a clearance search that skips China is skipping the largest single body of relevant prior art. South Korea (47) and Canada (46) are smaller but not negligible for companies with manufacturing or sales exposure there. Because receiving-office counts reflect where applicants chose to seek protection, they are also a rough proxy for where enforcement risk is concentrated.
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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.
Machine translation. Assignee and organisation names originally recorded in Chinese, Japanese or Korean have been rendered into English by an AI translation step so that the tables stay readable. These renderings are best-effort and may not match a company’s registered English name; the original name is what the underlying patent record carries, and it is what any Eureka query launched from this page uses.