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Run your analysis now →https://www.patsnap.com/resources/blog/rd-blog/polycarbonate-materials-and-processing-patent-landscape/ · Patsnap · data cut-off 2026-07-31 · downloaded from the live page
Patent Landscape · Polymers & ResinsPolycarbonate Materials and Processing Patents
- Filing has cooled from its 2017 peak. 234 filings in 2017 versus 8 in the still-partial latest year, with the 2022 midpoint (120) already below peak — the claim space is settling rather than expanding.
- C08L polymer-composition claims dominate the corpus. 5,106 of 7,475 records sit in C08L, more than the C08G condensation-chemistry class (3,327) and C08K additive class (2,429) combined with the rest.
- Momentum has thinned to a handful of active filers. Recent-year activity shows single-digit filings per assignee, most down 50-88% year on year, signalling a mature, consolidating field rather than a race.
7,475
Published Records
54%
Top-5 Share of All Records
-51%
Filing Growth 2021→2024
EP
Leading Jurisdiction
Filing growth compares 2021 (113 records) with 2024 (55) — 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 7,475 records in scope (CR5), not by the ranked leaders only.
Published byPatsnap Research··7 min readSourced from Patsnap Eureka
Overview
What this landscape covers
This dataset tracks patent families combining polycarbonate, PC resin or polycarbonate blend language in the title with claim or description text on notched impact, hydrolytic stability, flame retardance, optical grade, or melt polymerization — scoped to the C08G64, C08L69 and C08J5 classification families. That combination isolates the working chemistry and processing claims from generic plastics filings that merely mention polycarbonate in passing.
Coverage runs from 2015 through the mid-2026 data cut-off. Because publication typically lags filing by around eighteen months, the last one to two years in any trend chart will always look thinner than actual filing activity — treat the most recent bars as a floor, not a ceiling.
Filing activity, 2017-2026
Source: Patsnap Eureka. Assignee ranking and totals. Derived from a Patsnap search on Polycarbonate Materials and Processing covering 2015–2026, data cut-off 2026-07-31. Counts reflect published records only and shift as new filings publish.Run this in Eureka MCP
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The Numbers
Filing trend and technology mix
Two views make sense of a field that has already passed its filing peak: the year-by-year trend, and how records split across the IPC subclasses that define the technology.
A decade past peak filing
Filings ran at 234 in 2017, the peak year on record, dropped to 120 by the 2022 midpoint, and sit at 8 in the still-incomplete latest year. That trajectory — down from peak through the midpoint and still falling — marks polycarbonate materials as a field where claim space is largely staked out rather than one still being contested.
Composition claims outweigh process claims
C08L (polymer compositions) accounts for 5,106 of the 7,475 records, ahead of C08G (condensation polymers, including the melt-polymerization route) at 3,327 and C08K (additives, covering flame retardants and stabilizers) at 2,429. Processing-side classes — C08J (753), B29C (428) and B32B (212) — are far thinner, and optical-specific G02B filings (236) form a narrow specialist lane.
Shares are the percentage of the 7,475 records in scope. A patent can carry several IPC classes, so the shares add up to more than 100%.
Source: Patsnap Eureka. Filing trend and technology composition. Derived from a Patsnap search on Polycarbonate Materials and Processing covering 2015–2026, data cut-off 2026-07-31. Counts reflect published records only and shift as new filings publish.
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The records other filings build on
Representative Filing
Hydrolytic stability in polycarbonate compositions
SABIC INNOVATIVE PLASTICS IP B.V.
Disclosed herein are methods and compositions of blended polycarbonate resins with improved hydrolytic stability. The resulting compositions, comprising a hydrotalcite and inorganic buffer, can be used in the manufacture of articles while still retaining the advantageous physical properties of blended polycarbonate compositions with improved hydrolytic stability.Filed by SABIC Innovative Plastics IP B.V., published 2013-08-08 — this abstract is a scanning aid rather than a claims summary.
View full filingMost-cited records in this corpus
| # | Publication no. | Patent title | Citations |
|---|---|---|---|
| 1 | US3419634A | Organopolysiloxane polycarbonate block copolymers | 1,070 |
| 2 | US4937285A | Use of redox graft polymers to improve the petroleum-resistance of thermoplastic, aromatic polycarbonate and/… | 616 |
| 3 | WO2013175448A1 | Flame retardant thermoplastic compositions, methods of manufacture thereof and articles comprising the same | 525 |
| 4 | WO2014072923A1 | Process for producing polycarbonate compositions | 522 |
| 5 | JP1981055425A | Thermoplastic polycarbonate* its manufacture and product and its use as film | 352 |
| 6 | US7786246B2 | Isosorbide-based polycarbonates, method of making, and articles formed therefrom | 351 |
| 7 | US3189662A | Organopolysiloxane-polycarbonate block copolymers | 331 |
| 8 | US5061745A | Flame-retardant, high-impact polycarbonate molding compounds | 327 |
| 9 | US5530083A | Silicone-polycarbonate block copolymers and polycarbonate blends having reduced haze, and method for making | 289 |
| 10 | US4746701A | Thermoplastics moulding compositions based on polysiloxane/polycarbonate block copolymers | 284 |
Citation counts favour older filings simply because they have had longer to accumulate references — read them as markers of foundational influence, not of current commercial relevance.
Each row carries its publication number; clicking a row searches Eureka by that number.
Source: Patsnap Eureka. Citation counts and representative records. Derived from a Patsnap search on Polycarbonate Materials and Processing covering 2015–2026, data cut-off 2026-07-31. Counts reflect published records only and shift as new filings publish.Run this in Eureka MCP
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What the filing pattern tells you
The numbers point to a field where the core chemistry is well claimed and remaining activity clusters around additive and stabilizer formulation rather than new base resin routes.
Peak vs. now
234 → 8
filings, 2017 vs. latest year
Past-peak, not pre-peak
The trend already crested in 2017 and has declined through the 2022 midpoint of 120 to single digits in the most recent (partial) year. New entrants are filing into a space others staked out years ago.
Treat the final year as understated due to publication lag, not as evidence of a cliff.
Composition dominance
5,106 / 7,475
records in C08L
Composition claims crowd the field
Two out of three records touch polymer-composition claims (C08L), well ahead of condensation chemistry (C08G) and additive use (C08K). Anyone drafting a new blend claim is filing into the densest part of the corpus.
Processing classes (C08J, B29C, B32B) are comparatively open by volume.
Citation anchor
1,070 citations
US3419634A
One foundational patent still shapes the field
The organopolysiloxane-polycarbonate block copolymer patent carries by far the highest citation count in the corpus, indicating its claims still define a reference point for impact-modified PC chemistry decades on.
High citation count reflects age and influence, not current enforceability.
Filer concentration
-50% to -88% YoY
among active filers
Momentum has thinned to a short list
The assignees still filing in the latest year are doing so at one or two filings each, most down sharply year on year. This is a field of maintenance filings and formulation tweaks, not a filing race.
No assignee shows growth in the latest-year momentum data.
Eureka AI Agent
Looking for what nobody has claimed yet?
Eureka can read the same corpus for gaps instead of for coverage: under-claimed branches adjacent to polycarbonate materials and processing, with the prior art for and against each one.
Source: Patsnap Eureka. Co-assignee relationships and derived observations. Derived from a Patsnap search on Polycarbonate Materials and Processing covering 2015–2026, data cut-off 2026-07-31. Counts reflect published records only and shift as new filings publish.Run this in Eureka MCP
Players
Who is still active, and what they hold
Filing concentration and co-assignment patterns point to a small set of chemicals majors that built the core IP, plus specialty players active around flame retardance and optical grade.
Filing scale
7,475 families
total in ranking
A consolidated top table
The assignee ranking is built from every family in the corpus, and recent-year momentum data shows single-digit filing counts even among the most active current filers — a sign the field's largest players filed their core positions years ago.
Co-assignee pairs concentrate around a handful of corporate groups.
Strongest co-filing pair
38 shared families
Mitsubishi Chemical + Mitsubishi Engineering-Plastics
Intra-group co-filing is the norm
The densest co-assignee pairs in the dataset link a parent chemicals company to its plastics subsidiary or an optical-film partner, rather than cross-company joint filings — suggesting internal R&D structure drives co-assignment more than industry collaboration.
Second-strongest pair links the same parent to a separate electronics-materials affiliate.
Momentum leaders
2 filings, -85% YoY
top latest-year filer
Even the front-runners are pulling back
The assignee with the most latest-year filings still shows a steep year-on-year decline, and several long-standing names in the space show zero filings in the latest year. Reading this as retreat would be premature given publication lag, but it is not a growth signal either.
No assignee in the momentum table shows positive YoY growth.
Receiving-office split
2,280 EPO filings
leading office
Europe and the US anchor filing activity
EPO filings lead at 2,280, ahead of the United States at 2,058 and PCT at 809; Japan (411) and Canada (277) trail well behind, indicating the commercial battleground for this chemistry is primarily transatlantic.
AT nationalization (359) likely reflects EPO validation routing rather than independent filing strategy.
Recent-year filing momentum
| Assignee | Recent year | YoY |
|---|---|---|
| SABIC Global Technologies B.V. | 2 | -85% |
| Covestro Deutschland AG | 1 | 0% |
| Mitsubishi Chemical Corporation | 1 | -88% |
| SHPP Global Technologies B.V. | 1 | -50% |
| General Electric Company | 0 | — |
| SABIC Innovative Plastics IP B.V. | 0 | — |
| Bayer AG | 0 | — |
| Teijin Limited | 0 | — |
Source: Patsnap Eureka. Assignee-level momentum. Derived from a Patsnap search on Polycarbonate Materials and Processing covering 2015–2026, data cut-off 2026-07-31. Counts reflect published records only and shift as new filings publish.Run this in Eureka MCP
What's Next
Where to take this next
The trend and composition data narrow down where to look; the next step is testing a specific claim or formulation against the corpus directly.
Check freedom-to-operate on a specific blend
Run a targeted search against the C08L composition class before filing a new PC blend claim — this is the most crowded part of the corpus and the likeliest place for overlap.
Search this space in EurekaTrack the thinning filer list
Recent-year momentum shows only a handful of assignees still active; monitoring their filings directly is more useful than watching the field as a whole.
Set up assignee tracking in EurekaExplore the under-claimed processing branches
B29C shaping and B32B laminate classes are thin relative to composition claims — worth a deeper look if you are working on processing rather than formulation.
Explore white space in EurekaSource: Patsnap Eureka. Forward-looking reading of the same dataset. Derived from a Patsnap search on Polycarbonate Materials and Processing covering 2015–2026, data cut-off 2026-07-31. Counts reflect published records only and shift as new filings publish.Run this in Eureka MCP
FAQ
Common questions about polycarbonate patents
Filing in this space concentrates among a small set of established chemicals and plastics groups, with Mitsubishi Chemical and its engineering-plastics affiliate showing the strongest co-filing relationship in the dataset. SABIC's legacy IP entities and Covestro (the former Bayer materials business) also appear repeatedly across both filing and citation data. Rather than one dominant filer, the picture is a handful of legacy majors holding overlapping formulation and additive claims built up over the past decade.
No — filings peaked at 234 in 2017 and have declined steadily since, sitting at 120 by the 2022 midpoint and down to single digits in the most recent, still-partial year. Publication lag of roughly eighteen months means the final year or two is always undercounted, but the multi-year downward trend through the midpoint is clear regardless. This points to a field where the core chemistry space is already substantially claimed.
It claims blended polycarbonate resin compositions that improve hydrolytic stability using a hydrotalcite combined with an inorganic buffer, filed by SABIC Innovative Plastics IP B.V. and published in 2013. The claims are specific to that stabilizer combination and its effect on retaining the physical properties of the base PC blend, not to hydrolytic stability broadly. Anyone formulating a hydrolytically stable PC blend with a hydrotalcite-based additive package should review this filing's claim scope directly rather than assuming the general approach is open.
The thinner IPC classes relative to composition claims are the processing and laminate side: B29C (shaping, 428 records), B32B (laminates, 212 records) and the optical-specific G02B class (236 records) all carry far fewer filings than the C08L composition class's 5,106. That does not guarantee an open field, but it does mean fewer competing claims to search around when developing processing routes, laminate integration or optical-grade specialty PC. A proper freedom-to-operate search is still needed before filing in any of these branches.
US3419634A, covering organopolysiloxane polycarbonate block copolymers, is cited 1,070 times in this corpus — far ahead of any other record, including the next-highest citation count of 616. High citation counts in an older patent reflect decades of accumulated references rather than current commercial relevance, but this filing's continued citation volume indicates its impact-modification approach remains a reference point for subsequent formulation work.
Answers are grounded in the same dataset. Derived from a Patsnap search on Polycarbonate Materials and Processing covering 2015–2026, data cut-off 2026-07-31. Counts reflect published records only and shift as new filings publish.Run this in Eureka MCP
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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.