Silicone Elastomer Testing Patents: Top Companies & Trends 2026
- Filings have cooled since a 2020 peak. 697 records in 2020 fell to 428 by the 2022 midpoint, with the trend still declining into the most recent partial year.
- Formulation IPCs dominate over instrumentation. C08L polymer compositions alone account for 3,465 records, far outweighing any classification tied to the testing methods themselves.
- Momentum has almost stopped at the top of the ranking. Several previously active assignees show zero or single-digit filings in the latest year, including drops of -67% and -100% year-on-year.
Filing growth compares 2021 (509 records) with 2024 (233) — 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 14,342 records in scope (CR5), not by the ranked leaders only.
What this landscape covers
This dataset tracks patent families where silicone elastomer, silicone rubber or polysiloxane claims intersect with tensile testing, hardness measurement or cure characterization language in the title, abstract or claims. It spans publications from 2015 through the 2026-07-31 cut-off, with 14,342 total published records and an equal number of families in the assignee ranking, meaning duplicate-family inflation is not a factor here.
The corpus sits mostly inside materials-composition classes rather than instrumentation classes, which tells its own story: most applicants are protecting the silicone formulation and its cure or mechanical profile, and folding a test method into the same specification, rather than filing a standalone testing-apparatus patent.
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Filing trend and technology composition
Two views of the same dataset: how filing volume has moved year over year, and which IPC subclasses carry the bulk of the claim language.
A peak in 2020, then a steady decline
Filings rose to 578 in 2017 and peaked at 697 in 2020. By the 2022 midpoint they had fallen back to 428, and the latest partial year shows just 20 records — consistent with the roughly 18-month publication lag rather than a sudden stop, but the multi-year direction is clearly downward.
Formulation classes outweigh test-method classes
C08L (polymer compositions, 3,465 records) and C08G (condensation polymers, 2,239) lead the composition, with A61K medicinal preparations, C08K additives, C09J adhesives, B32B laminates, C08F addition polymers and C08J processing rounding out the picture. No dedicated instrumentation subclass appears among the leaders, which is itself informative about where applicants choose to stake claims.
Shares are the percentage of the 14,342 records in scope. A patent can carry several IPC classes, so the shares add up to more than 100%.
Go deeper on Silicone Elastomer Testing and Inspection with Eureka
This page is one run against one query. Ask Eureka your own question about silicone elastomer testing and inspection and every answer comes back with the patent numbers behind it.
Try EurekaA representative recent filing
WO2025111126A1 — Silicone rubber compositions
Filed by Dow Silicones Corporation and published 2025-05-30, this application covers high-temperature-vulcanizable (HTV) silicone rubber compositions built from physically recycled or reclaimed condensation-cured elastomeric silicone particulates, along with the cured elastomeric materials and the preparation method.The claims tie a recycled-content feedstock to a specific HTV cure window (roughly 100-200°C), which is a narrower target than a generic HTV composition claim.
| # | Publication no. | Patent title | Citations |
|---|---|---|---|
| 1 | US5071437A | Artificial disc | 1,360 |
| 2 | US4693935A | Polysiloxane-grafted copolymer pressure sensitive adhesive composition and sheet materials coated therewith | 1,039 |
| 3 | US20140168787A1 | Apparatus and method comprising deformable lens element | 798 |
| 4 | US5154762A | Universal water-based medical and dental cement | 758 |
| 5 | US4803075A | Injectable implant composition having improved intrudability | 732 |
| 6 | US4816339A | Multi-layered poly(tetrafluoroethylene)/elastomer materials useful for in vivo implantation | 700 |
| 7 | US5214119A | Block copolymer, method of making the same, dimaine precursors of the same, method of making such diamines an… | 668 |
| 8 | US5341818A | Guidewire with superelastic distal portion | 649 |
| 9 | US5461134A | Block copolymer, method of making the same, diamine precursors of the same, method of making such diamines an… | 561 |
| 10 | US4826945A | Biodegradable polymeric materials based on polyether glycols, processes for the preparation thereof and surgi… | 488 |
Citation counts reward older, well-indexed records; treat this table as a map of historical influence rather than current commercial weight.
Each row carries its publication number; clicking a row searches Eureka by that number.
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The volume and citation patterns point to a mature, formulation-heavy field where the open ground is procedural and characterization-specific rather than compositional.
A dense, formulation-first field
With 3,465 records in C08L alone, tensile and hardness claims are almost always riders on a composition patent rather than the primary invention. A standalone test-method claim has to clear a very crowded compositional backdrop.
Filing activity is cooling, not accelerating
The 2020 peak has not been repeated, and the decline into the 2022 midpoint predates the reporting lag. New entrants filing today are stepping into a shrinking, not growing, pool of annual filings.
Influence sits with decades-old medical-device art
The most-cited records date to earlier medical and adhesive applications of silicone. Their citation weight reflects age and indexing depth in a searched corpus, not that those claim scopes are still the ones worth avoiding today.
Joint filings cluster around a few corporate families
The strongest co-assignee link, between two Dow entities, plus a cross-industry pairing with a cosmetics group, suggests collaboration is mostly intra-group rather than open cross-licensing between unrelated players.
Eureka can read the same corpus for gaps instead of for coverage: under-claimed branches adjacent to silicone elastomer testing and inspection, with the prior art for and against each one.
Assignee activity and where it is slowing
Recent-year momentum figures show a field where even previously active filers have gone quiet, which changes how a freedom-to-operate review should weight older grants.
Consumer-products filers are pulling back
Kimberly-Clark Worldwide shows just 2 filings in the latest year, down 67% year-on-year, and several other historically active names, including Procter & Gamble and Johnson & Johnson Vision Care, show zero filings in the latest year after a -100% drop.
A thin trickle from the largest chemical filers
3M Innovative Properties and Shin-Etsu Chemical each show only a single filing in the latest year. That is not evidence of exit, given the publication lag, but it does mean the visible pipeline from these filers is currently minimal.
Dow's two entities anchor the strongest link
The strongest co-assignee pair in the dataset links Dow Silicones Corporation with Dow Global Technologies, at 46 joint filings, well ahead of the next pairing involving a cosmetics group and a personal-care applicant.
| Assignee | Recent year | YoY |
|---|---|---|
| Kimberly-Clark Worldwide, Inc. | 2 | -67% |
| 3M Innovative Properties Company | 1 | — |
| Shin-Etsu Chemical Co., Ltd. | 1 | — |
| L'Oréal | 0 | — |
| The Procter & Gamble Company | 0 | -100% |
| Johnson & Johnson Vision Care, Inc. | 0 | -100% |
| PPG Industries Ohio, Inc. | 0 | -100% |
| 3M Company | 0 | — |
Where to take this analysis
The trend and composition data point to specific next steps depending on whether the goal is freedom-to-operate, white-space filing, or monitoring active competitors.
Check the crowded compositional core
Before drafting a new formulation-plus-test claim, screen it against the C08L and C08G density directly, since that is where prior art is thickest.
Explore the IPC breakdownWatch the quiet filers
Assignees with sharp YoY drops may still hold broad unexpired grants; a slowdown in new filings is not the same as an expired portfolio.
Review assignee momentumTest claims against the recycled-content angle
WO2025111126A1 shows a live interest in recycled-feedstock HTV compositions; adjacent characterization claims around that feedstock remain comparatively open.
Read the representative filingCommon questions about this landscape
This dataset contains 14,342 published patent families matching silicone elastomer, silicone rubber or polysiloxane claims combined with tensile testing, hardness measurement or cure characterization language, covering 2015 through mid-2026. Because the family count matches the record count, there is little duplicate-filing inflation to adjust for. Most of these records are formulation patents that include a test method as a supporting claim rather than standalone testing-apparatus patents.
Filing activity peaked at 697 records in 2020 and has declined since, falling to 428 by the 2022 midpoint and to just 20 in the most recent partial year. Some of that final-year drop is the normal publication lag, since patents typically publish around 18 months after filing, but the multi-year direction from 2020 onward is a genuine decline. A new entrant today is filing into a shrinking annual pool, not a growing one.
C08L (polymer compositions) leads with 3,465 records, followed by C08G condensation polymers at 2,239. A61K medicinal preparations, C08K additives, C09J adhesives, B32B laminates, C08F addition polymers and C08J processing all follow closely. No instrumentation-specific IPC subclass ranks among the leaders, indicating that most applicants protect the material composition and fold the test method into the same specification rather than filing a dedicated testing-method patent.
The dataset's recent-year momentum figures show several previously active consumer and chemical companies slowing sharply: Kimberly-Clark Worldwide is down 67% year-on-year, while Procter & Gamble and Johnson & Johnson Vision Care show 0 filings in the latest year after a full -100% drop. 3M Innovative Properties and Shin-Etsu Chemical each show only a single filing in the latest year. The strongest collaborative link in the dataset is between Dow Silicones Corporation and Dow Global Technologies, at 46 joint filings.
The compositional core around C08L and C08G is dense, but adjacent characterization areas are comparatively open, including in-line cure-rate monitoring, durometer calibration methods, post-cure hardness drift testing, non-destructive tensile proxy sensing, and characterization methods specific to recycled-content HTV feedstocks. The last of these is directly relevant given the recent WO2025111126A1 filing on recycled elastomeric silicone particulates. A first claim in these areas would need to tie the test method to a specific measurable parameter and process window rather than claiming the composition alone.
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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.