Pipeline Coatings Patents: Who Leads, Where the Gaps Are 2026
- Ownership is concentrated fast: the top 5 assignees alone account for 51.1% of all 661 records in scope, and the top 10 reach 64.0%.
- Filing is recovering, not fading: activity fell from a 2017 peak of 48 filings but climbed 2021 to 2024 from 5 to 11 filings, a +120% swing that publication lag understates for the last two years.
- Coating chemistry outpaces bare corrosion science: B29C shaping-of-plastics claims sit in 31.2% of records, well ahead of C23F corrosion-and-metal-removal claims at 13.3%.
Filing growth compares 2021 (5 records) with 2024 (11) — 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 661 records in scope (CR5), not by the ranked leaders only.
What this landscape covers
Pipeline external coating and cathodic protection technology sits at the intersection of materials science and corrosion engineering: fusion bonded epoxy and field joint coating claims describe how a pipe surface is protected during and after installation, while cathodic protection system claims describe how stray current, anode bed design and disbondment are managed once the pipe is in the ground or under the sea. This dataset pulls 661 published records filed between 2015 and mid-2026 that combine both threads — a coating claim paired with a corrosion-mitigation or survey claim — rather than treating coating chemistry and cathodic protection as separate fields.
Because a single filing can carry claims across several IPC subclasses, the technology composition below adds up to more than 100% of the record total. That overlap is itself informative: it shows how often coating claims are drafted alongside welding, testing or corrosion-specific claims rather than filed alone.
Filing trends and technology composition
Two views of the same 661-record dataset: how filing volume has moved year over year, and which IPC subclasses carry the claims once a record is filed.
Filing trend, 2017-2026
Filings peaked at 48 in 2017 and declined through the early 2020s before recovering: 2021 to 2024 moved from 5 to 11 filings, a +120% increase across that span. 2025 and 2026 figures are still incomplete because publication typically lags filing by around 18 months, so the most recent two years understate real activity rather than signalling a slowdown.
Technology composition by IPC subclass
F16L (pipes and pipe fittings) appears in 52.5% of the 661 records, confirming that most filings are drafted as pipe-system claims rather than pure coating-material claims. B29C (shaping of plastics) at 31.2% and C09D (coatings, paints and inks) at 8.8% show where the coating chemistry itself is claimed, while C23F (corrosion and metal removal) at 13.3% and G01N (material analysis and testing) at 8.9% mark the cathodic-protection and inspection side of the claim set.
Shares are the percentage of the 661 records in scope. A patent can carry several IPC classes, so the shares add up to more than 100%.
Go deeper on Pipeline Coatings and Cathodic Protection with Eureka
This page is one run against one query. Ask Eureka your own question about pipeline coatings and cathodic protection and every answer comes back with the patent numbers behind it.
Try EurekaMost-cited records and a representative recent filing
Methods and systems for guiding corrosion surveys of underground pipeline (US20250180428A1)
Filed by American Innovations, Ltd. and published 2025-06-05, this record covers close interval survey methods that receive and filter waveform data captured while an operator inspects a cathodically protected underground pipeline. The waveform data is binned and scored against predefined compliance criteria; if the likelihood of a 'good' reading falls below a specified threshold, the system triggers corrective action guidance for the surveyor in the field.This is a software-and-sensor-workflow claim layered on top of a physical cathodic protection system, rather than a claim on the coating or anode hardware itself.
| # | Publication no. | Patent title | Citations |
|---|---|---|---|
| 1 | US20180117718A1 | Self-powered welding systems and methods | 126 |
| 2 | US20170182605A1 | Systems and methods for use in welding pipe segments of a pipeline | 74 |
| 3 | US20040232924A1 | Methods and systems for automated pipeline testing | 72 |
| 4 | WO2009027686A1 | Improvements in coating pipes | 65 |
| 5 | US20180031152A1 | Internally welded pipes | 64 |
| 6 | US6049657A | Marine pipeline heated with alternating current | 60 |
| 7 | US20030189435A1 | Automated cathodic protection monitor and control system | 56 |
| 8 | US20110297316A1 | Low temperature method and system for forming field joints on undersea pipelines | 52 |
| 9 | WO2008071773A2 | Pipe-joining method and apparatus for producing underwater pipelines, and underwater-pipeline-laying vessel c… | 52 |
| 10 | US20180029154A1 | Rotating welding system and methods | 48 |
Citation counts favour older records simply because they have had more time to be cited within the searched corpus; treat them as a signal of influence on subsequent filings, not as a ranking of current commercial importance.
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Three patterns stand out once the ranking, the trend and the IPC composition are read together.
Ownership sits with a small group, but not a monopoly
The leader holds 155 records and fifth place holds 22 — a steep drop-off that still leaves room below the top ranks. Below tenth place (14 records), filings spread across a long tail of single- and low-digit filers, which is where freedom-to-operate searches need the most care because prior art is scattered rather than concentrated in one portfolio.
Recovery is real but recent years understate it further
Filing volume climbed from 5 records in 2021 to 11 in 2024, reversing the decline from the 2017 peak of 48. Because publication lags filing by roughly 18 months, 2025 and 2026 counts will keep rising as more records surface — reading those two years as a plateau or a drop would be a misread of the lag, not the trend.
Coating claims outnumber pure corrosion-science claims
B29C (shaping of plastics) appears in nearly a third of records while C23F (corrosion and metal removal) appears in about one in eight, suggesting the field's claim activity is weighted toward how the coating is applied and shaped rather than the underlying corrosion chemistry. G01N testing claims at 8.9% show a smaller but consistent thread of inspection and survey methods layered on top.
Eureka can read the same corpus for gaps instead of for coverage: under-claimed branches adjacent to pipeline coatings and cathodic protection, with the prior art for and against each one.
| Assignee | Co-assignee | Shared families |
|---|---|---|
| Borealis AG | J. Van Bergen Management LLC | 12 |
| Offshore Joint Services Inc | DUNCAN JOSEPH C | 8 |
| Saipem SpA | BREGONZIO VALERIO | 6 |
| Shawcor Ltd | 2543500 Alberta Ltd | 6 |
| Saipem SpA | CITTADINI BELLINI SERAFINO | 3 |
| Saipem SpA | PASSERINI ANTONIO | 2 |
| Saipem SpA | DIONIGI MARIANO | 2 |
| Saipem SpA | CITTADINI BELLINI SEFARINO | 2 |
Co-assignee activity is limited to 10 identified pairings in this dataset, concentrated among a handful of firms that file jointly with named individual inventors or specialty contractors — a pattern more consistent with joint-venture project filings than broad cross-licensing.
Who holds the claim space, and where it thins out
The ranked leaders hold a majority of records between them, but the technology composition points to sub-areas that remain lightly claimed relative to the core coating and pipe-fitting classes.
A single filer holds well over double the fifth-place count
The top assignee's 155 records compare to 22 at fifth place, a gap wide enough that its portfolio effectively sets the prior-art baseline for coating and joint-protection claims filed after it.
The next tier is tightly bunched
Between fifth place (22 records) and tenth place (14 records), filing counts compress quickly, indicating several firms hold comparable but modest claim positions rather than one clear second-place challenger.
Most of the ranking files in low single digits
Outside the top 10, the remaining assignees in the 98-company ranking each hold a small slice of the field, which is typical where cathodic protection hardware and coating formulations are supplied by regional contractors rather than a handful of global players.
| Assignee | Recent year | YoY |
|---|---|---|
| Saipem SpA | 0 | -100% |
| PIPELINE INDUCTION HEAT | 0 | — |
| Shawcor Ltd | 0 | — |
| Heerema Marine Contractors Nederland SE | 0 | — |
| Dow Global Technologies LLC | 0 | — |
| CRC-Evans Pipeline International Inc | 0 | — |
| Materia Inc | 0 | -100% |
| Offshore Joint Services Inc | 0 | — |
Where to take this analysis
The landscape data points to specific next steps depending on whether the goal is freedom-to-operate, licensing or R&D scoping.
Run a freedom-to-operate check against the top holder
With 155 records concentrated in one portfolio, any new coating or joint-protection filing should be checked against that assignee's claim scope before drafting, not just against the field average.
Explore assignee portfolios in Eureka →Scope claims around the under-claimed branches
Alternating-current corrosion mitigation and offshore anode bed design carry fewer records relative to the core F16L and B29C clusters, which is where a narrowly drafted first claim has more room to stand.
Map white space in Eureka →Track the 2021-2024 momentum into current filings
The +120% growth from 2021 to 2024 is the clearest recent signal in the trend; watching which assignees drive 2025-2026 publications as they surface will show whether the recovery is broad-based or led by a few filers.
Set up filing alerts in Eureka →Common questions about this landscape
One assignee leads the ranked list with 155 records, more than double the fifth-place holder's 22. The top 5 assignees combined account for 51.1% of all 661 records in scope, and the top 10 reach 64.0%. Below that group, the remaining assignees in the 98-company ranking each hold comparatively small counts, so most freedom-to-operate risk outside the leader concentrates in a mid-tier of firms rather than a single competitor.
Filings peaked at 48 in 2017 and declined for several years before recovering: 2021 to 2024 moved from 5 to 11 records, a +120% increase. Because patent publication typically lags filing by around 18 months, the 2025 and 2026 counts in any dataset pulled today are still incomplete and should not be read as a renewed slowdown. The safest complete-year comparison currently available is the 2021-2024 span.
F16L (pipes and pipe fittings) appears in 52.5% of the 661 records, making it the most common claim class by a wide margin. B29C (shaping of plastics) follows at 31.2%, reflecting how coatings are applied and formed, while C23F (corrosion and metal removal) sits at 13.3% and C09D (coatings, paints and inks) at 8.8%. Because records can carry multiple IPC classes, these figures overlap rather than summing to 100%, showing that coating and pipe-fitting claims are frequently drafted together.
US20250180428A1, filed by American Innovations, Ltd. and published 2025-06-05, covers a method for filtering and scoring close-interval survey waveform data to flag when a reading falls below a compliance threshold and trigger corrective guidance. It is a data-processing and workflow claim layered on top of a cathodic protection system, not a claim on coating chemistry, anode hardware or the physical pipeline itself. A product built around anode bed design or coating formulation would not necessarily infringe this claim, but a survey tool that scores waveform compliance in a similar way would need a design-around on the scoring and binning logic specifically.
The IPC composition shows corrosion-specific classes (C23F at 13.3%, G01N testing at 8.9%) are claimed far less often than the dominant pipe-fitting and plastics-shaping classes (F16L at 52.5%, B29C at 31.2%). Sub-areas such as alternating-current corrosion mitigation, offshore anode bed design and stray current interference monitoring sit adjacent to these dense clusters but carry noticeably fewer records. A first claim in one of these branches has more room to stand without colliding with the top assignee's existing 155-record portfolio.
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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.