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Run your analysis now →https://www.patsnap.com/resources/blog/rd-blog/polytetrafluoroethylene-processing-technologies-patent-landscape/ · Patsnap · data cut-off 2026-07-31 · downloaded from the live page
Patent Landscape · FluoropolymersPolytetrafluoroethylene Processing Patents: Who Leads and Where Filing Is Open
- 47.2% of all filings sit with just five assignees, a concentration that narrows the field's realistic partner and licensing pool fast.
- Filings fell 47% from 2021 to 2024 (36 to 19), the clearest complete-year signal in the dataset, even as recent years still fill in.
- A61L and B32B trail the core classes at 11.1% and 8.0% of records, pointing to sterilisation and laminate integration as comparatively open ground.
1,283
Published Records
47%
Top-5 Share of All Records
-47%
Filing Growth 2021→2024
US
Leading Jurisdiction
Filing growth compares 2021 (36 records) with 2024 (19) — 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 1,283 records in scope (CR5), not by the ranked leaders only.
Published byPatsnap Research··7 min readSourced from Patsnap Eureka
Field Overview
What this landscape covers
This landscape covers 1,283 published patent records matching polytetrafluoroethylene resin, PTFE dispersion and PTFE paste extrusion claims combined with process-control terms such as sintering cycle, lubricant removal, reduction ratio, void content, skiving process and creep resistance. The scope spans 2015 through the 2026-07-31 data cut-off, so it captures both mature paste-extrusion process claims and newer composite and medical-device applications of PTFE. Patent families are used in the assignee ranking to avoid inflating counts from continuation filings or parallel jurisdictional copies.
Publication lags filing by roughly 18 months, so 2025 and 2026 figures in any trend chart understate real filing activity for those years; treat the 2024 figure as the most recent complete signal.
Filing activity and technology mix, 2017–2026
Source: Patsnap Eureka. Assignee ranking and totals. Derived from a Patsnap search on Polytetrafluoroethylene Processing Technologies 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
Filing Data
Filing trend and technology composition
The two views below cover the same 1,283 records: one tracks filing activity by year, the other breaks the same set down by IPC subclass. Because a single record can carry several IPC codes, the subclass shares add to more than 100% of the record total.
Filings peaked in 2019 and have since cooled
Filings ran from 38 in 2017 to a peak of 60 in 2019, then declined; the 2021-to-2024 span shows a 47% drop (36 to 19), the last complete-year comparison available before publication lag distorts the count.
Polymer composition and processing classes dominate
C08L (polymer compositions), C08F (addition polymers) and C08J (polymer processing and solutions) each cover roughly a quarter to just under 29% of the 1,283 records, with B29C shaping claims close behind at 24.3%. Sterilising and laminate classes (A61L, B32B, B29K) sit well below that, each under 12% of records.
Shares are the percentage of the 1,283 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 Polytetrafluoroethylene Processing Technologies covering 2015–2026, data cut-off 2026-07-31. Counts reflect published records only and shift as new filings publish.
Go deeper on Polytetrafluoroethylene Processing Technologies with Eureka
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Representative and most-cited filings
Representative Filing
Preparation method for polytetrafluoroethylene composition, forming product, conductive pipe, heat conduction film and substrate CCL
DAIKIN FLUOROCHEMICALS (CHINA) CO., LTD.
A method for producing a polytetrafluoroethylene composition including mixing a polytetrafluoroethylene resin and a filler using an airflow mixer to provide a polytetrafluoroethylene composition containing the polytetrafluoroethylene resin and the filler. The airflow mixer is a pulse-type airflow mixer or an airflow stirrer. Also disclosed is a polytetrafluoroethylene composition produced by the production method, a polytetrafluoroethylene composition having specific physical properties, as well as a molded article, electrically conductive tube, thermally conductive film, and substrate for CCL each obtained from the polytetrafluoroethylene composition.Filed by Daikin Fluorochemicals (China), this filing illustrates how downstream filler-mixing process claims extend core PTFE resin patents into conductive and thermally conductive end products.
Most-cited records in this landscape
| # | Publication no. | Patent title | Citations |
|---|---|---|---|
| 1 | US9139669B2 | Expandable functional TFE copolymer fine powder, the expandable functional products obtained therefrom and re… | 417 |
| 2 | US4482516A | Process for producing a high strength porous polytetrafluoroethylene product having a coarse microstructure | 401 |
| 3 | US4946377A | Tissue repair device | 386 |
| 4 | US6039755A | Radially expandable tubular polytetrafluoroethylene grafts and method of making same | 357 |
| 5 | US4463329A | Dielectric waveguide | 307 |
| 6 | US6090081A | Sealing stopper for a syringe and a prefilled syringe | 285 |
| 7 | US4576869A | Tetrafluoroethylene fine powder and preparation thereof | 252 |
| 8 | US4110392A | Production of porous sintered PTFE products | 233 |
| 9 | US5258040A | Prosthesis for tensile load-carrying tissue and method of manufacture | 228 |
| 10 | US3142665A | Novel tetrafluoroethylene resins and their preparation | 207 |
Citation counts are measured inside this searched corpus and favour older filings that have had more time to accumulate citations; treat them as a signal of influence rather than 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 Polytetrafluoroethylene Processing Technologies 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 concentration and citation data signal
Three patterns stand out once the ranking, the trend and the citation table are read together: a small leadership group, a decelerating but not collapsing filing rate, and an older core of highly-cited foundational patents.
Concentration
47.2%
of 1,283 records held by top 5
Filing is concentrated at the top
Five assignees account for 605 of the 1,283 records in scope, and the top ten extend that to 60.4% (775 records). Below that the ranking runs into a long tail of single- and few-filing entrants, meaning most freedom-to-design assessments will hinge on a small number of counterparties.
Based on the full 100-company ranking returned for this dataset.
Momentum
-47%
filings, 2021 to 2024
Complete-year filings are down, not flat
The only clean multi-year comparison available, 2021 (36) to 2024 (19), shows a real decline rather than a plateau. Recent-year totals from several of the largest filers show single-digit or zero activity in the latest tracked year, though publication lag means 2025-26 figures are still incomplete.
2024 is the most recent year treated as complete.
Citation core
417 citations
on the most-cited record
Foundational patents are still doing the citing work
The most-cited records in this corpus date back to expandable PTFE fine powder and porous PTFE microstructure work, with citation counts in the 300-400+ range. That reflects age and time-to-accumulate more than current commercial weight, since older filings have simply had longer to be cited.
Citation counts measured within the searched corpus only.
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 polytetrafluoroethylene processing technologies, with the prior art for and against each one.
Source: Patsnap Eureka. Co-assignee relationships and derived observations. Derived from a Patsnap search on Polytetrafluoroethylene Processing Technologies 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 & Gaps
Who files, and where the claim space thins out
The leadership group is dense and well-documented; the gaps sit in adjacent application classes that show up in far fewer of the 1,283 records than the core polymer and shaping classes do.
Leader
201 records
held by the top-ranked assignee
A single filer leads by a wide margin
The top-ranked assignee holds 201 of the 1,283 records, well ahead of the fifth-place holder at 71 and the tenth-place holder at 24. That gap suggests the leader's portfolio sets the practical boundary for paste-extrusion and resin-composition claims that most new filings will need to design around.
Ranking counted by patent family.
Co-filing
10 pairs
of recurring co-assignees
Co-assignee activity is thin and clustered
Only ten recurring co-assignee pairs appear across the dataset, with the strongest pairing tied to eight shared records. Collaborative filing is not the norm in this field; most assignees prosecute independently rather than through joint ventures or shared inventor teams.
Counted across all 1,283 records in scope.
Recent activity
-83% YoY
at the leading filer's latest tracked year
Even leaders show a slower latest year
The top-ranked assignee's own latest-year count dropped sharply year-on-year, and several other major filers show zero filings in the latest tracked year. Given the roughly 18-month publication lag, this understates true recent activity but still points to a cooling filing pace among the historically dominant players.
Momentum figures reflect the latest tracked year, which is not yet complete.
Recent-year filing momentum by assignee
| Assignee | Recent year | YoY |
|---|---|---|
| Daikin Industries, Ltd. | 1 | -83% |
| Junkosha Inc. | 1 | — |
| E.I. du Pont de Nemours and Company | 0 | — |
| W.L. Gore & Associates, Inc. | 0 | — |
| Toray Industries, Inc. | 0 | — |
| NTN Corporation | 0 | — |
| AGC Inc. | 0 | -100% |
| Merit Medical Systems, Inc. | 0 | -100% |
Source: Patsnap Eureka. Assignee-level momentum. Derived from a Patsnap search on Polytetrafluoroethylene Processing Technologies 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 dataset points to a mature, concentrated core and a thinner set of adjacent application classes. The next steps depend on whether the goal is freedom-to-operate, licensing, or identifying open filing space.
Map claims against the leadership group
With 47.2% of records held by five assignees, a freedom-to-operate review should start with the top-ranked holder's claim scope on resin composition and paste extrusion before looking further down the ranking.
Explore assignee claims in Eureka →Check the under-claimed branches
Sterilising, laminate and additive classes sit well below the core polymer classes in record share. Before filing there, confirm whether that's genuine white space or simply an area this search string under-captures.
Run a deeper query in Eureka →Source: Patsnap Eureka. Forward-looking reading of the same dataset. Derived from a Patsnap search on Polytetrafluoroethylene Processing Technologies 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 PTFE processing patents
One assignee leads the ranked field with 201 of the 1,283 records in scope, well ahead of the fifth-place holder at 71 and tenth place at 24. The top five assignees combined hold 47.2% of all records, and the top ten hold 60.4%. This concentration means a small number of companies control most of the documented claim space around resin composition, paste extrusion and sintering process control.
Filing activity peaked in 2019 at 60 records and has declined since; the clearest complete-year comparison, 2021 to 2024, shows a 47% drop from 36 to 19 filings. Figures for 2025 and 2026 are still incomplete because publication typically lags actual filing by around 18 months, so the most recent years should not be read as the final word on current activity. Taken together, the trend points to a cooling rather than an accelerating field over the last several complete years.
The dataset's IPC breakdown shows polymer compositions (C08L, 28.9% of the 1,283 records), addition polymers (C08F, 27.4%), polymer processing and solutions (C08J, 25.8%) and shaping of plastics (B29C, 24.3%) as the dominant classes. Additive use (C08K), sterilising and disinfecting (A61L), moulding materials (B29K) and layered products (B32B) each cover a smaller share, from about 8% to 12% of records. Because records can carry multiple IPC codes, these shares add up to more than 100% and should not be summed.
Classes tied to sterilisation-compatible laminates, creep-resistant skived tape, low-void paste extrusion control and PTFE-composite substrates for CCL sit at noticeably lower record shares than the core polymer-composition and shaping classes. That gap does not guarantee the technology is unclaimed elsewhere, but it does mean fewer documented filings compete directly in those specific process-control niches within this dataset. Anyone filing there should still run a targeted search beyond this landscape's search string to confirm the space is genuinely open.
It is concentrated at the top and long-tailed below it: the top five assignees hold 47.2% of the 1,283 records in scope, and the top ten hold 60.4%. Beyond the ranked leaders, the remaining assignees in the 100-company ranking each hold comparatively few records, forming a long tail of single- or few-filing entrants. That structure matters for licensing strategy, since most of the enforceable claim density sits with a handful of companies rather than being spread evenly across the field.
Answers are grounded in the same dataset. Derived from a Patsnap search on Polytetrafluoroethylene Processing Technologies 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.