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Run your analysis now →https://www.patsnap.com/resources/blog/rd-blog/centrifugal-pump-environmental-durability-patent-landscape/ · Patsnap · data cut-off 2026-07-31 · downloaded from the live page
Mechanical Engineering & Machinery · Patent LandscapeCentrifugal Pump Environmental Durability Patents: Who Files, and Where the Claim Space Is Still Open
- Filings peaked in 2017 at 160 and have declined since, with 2026 (partial) at 17 — a mature filing curve rather than a growth wave.
- F04D (non-positive-displacement pumps) carries 745 records, more than double the next largest subclass, showing where claim density is heaviest.
- The United States leads receiving offices with 995 filings, ahead of Europe at 396 and Japan at 277, setting where prior art is thickest for clearance searches.
3,170
Published Records
14%
Top-5 Share of All Records
-43%
Filing Growth 2021→2024
US
Leading Jurisdiction
Filing growth compares 2021 (130 records) with 2024 (74) — 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 3,170 records in scope (CR5), not by the ranked leaders only.
Published byPatsnap Research··7 min readSourced from Patsnap Eureka
Overview
What this landscape covers
Centrifugal pump environmental durability spans the intersection of pump hydraulics and materials engineering: impeller and casing designs built to survive corrosion, erosion and cavitation in demanding service. The dataset pulls 3,170 patent families published between 2015 and mid-2026 that combine centrifugal pump or impeller language with corrosion, erosion or cavitation-resistance claims. It is a mechanical-materials hybrid field, and the IPC composition reflects that split between pump architecture and the coatings, alloys and casting processes that make a wetted part last.
Because publication trails filing by roughly eighteen months, the 2025 and 2026 figures in any trend line understate true filing activity for those years; the decline visible from 2017 onward is real, but the most recent one or two years should be read as a floor, not a final count.
Filing volume by year, 2017–2026
Source: Patsnap Eureka. Assignee ranking and totals. Derived from a Patsnap search on Centrifugal Pump Environmental Durability 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
The data
Filing trend and technology composition
Two views of the same dataset: filing activity over time, and how records split across the technical subclasses that define this field.
A curve that peaked in 2017 and has not recovered
Filings ran at 160 in 2017, roughly double the 78 recorded at the 2022 midpoint, and have kept falling toward 17 in the partial 2026 count. That pattern points to a technology area where core claim territory was staked out early and subsequent filers are refining rather than opening new ground.
Pump architecture dominates, materials science fills the rest
F04D (non-positive-displacement pumps) accounts for 745 records, well ahead of B01D separation processes at 272 and C22C alloys at 258. E21B well-drilling, H02K electric motors, C23C coatings, C02F water treatment and B22D metal casting each contribute smaller but distinct slices, showing that durability claims are being built as much around materials and adjacent equipment as around the pump itself.
Shares are the percentage of the 3,170 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 Centrifugal Pump Environmental Durability covering 2015–2026, data cut-off 2026-07-31. Counts reflect published records only and shift as new filings publish.
Go deeper on Centrifugal Pump Environmental Durability with Eureka
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A representative early claim in shroud-based sealing
Representative record
US4648808A — Sealing shroud centrifugal pump (CP Pumpen AG, 1987)
CP PUMPEN AG
Inside the sealing shroud of the centrifugal pump there is located an inner rotor driven by a drive motor, while an outer rotor which is connected to the pump impeller is located outside of the sealing shroud wall. At least the sealing shroud wall is formed of a material which is electrically non-conductive. The efficiency is improved. Materials not normally used in sealing shrouds, such as ceramics, can be used for the same and this increases the usefulness or fields of application of the pump.Filed decades before the bulk of this dataset, this record establishes the non-conductive shroud wall as prior art that any magnetically coupled, seal-less pump design must now clear.
Most-cited records in this corpus
| # | Publication no. | Patent title | Citations |
|---|---|---|---|
| 1 | US20100210745A1 | Molecular Healing of Polymeric Materials, Coatings, Plastics, Elastomers, Composites, Laminates, Adhesives, a… | 717 |
| 2 | US7011154B2 | In situ recovery from a kerogen and liquid hydrocarbon containing formation | 383 |
| 3 | US6782947B2 | In situ thermal processing of a relatively impermeable formation to increase permeability of the formation | 364 |
| 4 | US7077199B2 | In situ thermal processing of an oil reservoir formation | 356 |
| 5 | US6880633B2 | In situ thermal processing of an oil shale formation to produce a desired product | 348 |
| 6 | US6969123B2 | Upgrading and mining of coal | 340 |
| 7 | US7066254B2 | In situ thermal processing of a tar sands formation | 337 |
| 8 | US7096942B1 | In situ thermal processing of a relatively permeable formation while controlling pressure | 322 |
| 9 | US7040400B2 | In situ thermal processing of a relatively impermeable formation using an open wellbore | 318 |
| 10 | US20100233146A1 | Coatings and Surface Treatments Having Active Enzymes and Peptides | 317 |
Citation counts favour older records simply by virtue of being searchable longer; treat them as a signal of influence within this corpus, not as a ranking 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 Centrifugal Pump Environmental Durability 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 numbers mean for filing strategy
Three readings of the dataset that matter more than the raw counts on their own.
Filing trajectory
160 → 17
peak (2017) to latest partial year
The growth phase is over
Filings have declined steadily from a 2017 peak of 160 through a 2022 midpoint of 78 to 17 in the partial 2026 count. Even accounting for publication lag, this is a mature filing curve: the field is being consolidated and refined rather than expanded.
Read the recent-year numbers as a floor, not a forecast.
Claim density
745 records
in F04D, the largest subclass
Pump architecture is the most crowded ground
F04D non-positive-displacement pump claims outnumber the next largest subclass, B01D separation processes, by nearly three to one. New impeller or casing geometry claims will run into the densest prior art in this dataset.
Materials subclasses (C22C, C23C, B22D) offer comparatively more room.
Jurisdiction
995 filings
at the USPTO, the largest receiving office
The US is the primary clearance jurisdiction
The United States receives nearly 2.5 times the filings of the next-largest office, Europe at 396. Freedom-to-operate work for this field has to start with a US-first search strategy, with China (269) and WIPO/PCT (235) as secondary checks.
Canada, at 169, is a smaller but non-trivial filter for pump-specific claims.
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Eureka can read the same corpus for gaps instead of for coverage: under-claimed branches adjacent to centrifugal pump environmental durability, with the prior art for and against each one.
Source: Patsnap Eureka. Co-assignee relationships and derived observations. Derived from a Patsnap search on Centrifugal Pump Environmental Durability 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
A fragmented field with a thin layer of repeat filers
Only ten co-assignee pairs appear in this dataset, and recent-year momentum figures show most named assignees filing nothing in the latest year — a sign of a field with a long tail of single or occasional filers rather than a small set of dominant players.
Collaboration pattern
10 pairs
co-assignee pairs in the dataset
Collaboration is rare and concentrated
The strongest pairing in the dataset links a mechanical seal specialist with a seal-material partner, and repeats with a related affiliate — suggesting durability innovation here often runs through supplier partnerships around sealing rather than through broad multi-party consortia.
Most assignees in the dataset show no recorded co-filing partner at all.
Recent momentum
0 in latest year
for most named assignees
Momentum has stalled across the board
Every assignee tracked for recent-year momentum shows flat or negative year-over-year activity, several dropping from prior filings to zero. That is consistent with the overall filing decline rather than any single company retreating from the space.
No assignee in the tracked set shows positive growth into the latest year.
Field structure
3,170 families
across the full ranking
A long tail, not a concentrated core
With thousands of families spread thin and no assignee showing sustained recent growth, this looks less like a field with an entrenched leader to design around and more like one where claim space is held in fragments — useful context before assuming any single competitor sets the boundaries.
Check the assignee table for the specific names active in your sub-area.
Recent-year filing momentum by assignee
| Assignee | Recent year | YoY |
|---|---|---|
| Bright Lightsource Energy Company | 2 | 0% |
| Shell Oil Company | 0 | — |
| Direct Drive Systems, Inc. | 0 | — |
| DEKA Products Limited Partnership | 0 | -100% |
| FRS GROUP LLC | 0 | -100% |
| Ebara Corporation | 0 | -100% |
| Magnetic Ground Company | 0 | — |
| Eagle Industry Co., Ltd. | 0 | — |
Source: Patsnap Eureka. Assignee-level momentum. Derived from a Patsnap search on Centrifugal Pump Environmental Durability 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 analysis
The dataset points to specific next steps depending on whether the goal is clearance, sourcing or claim drafting.
Run a US-first freedom-to-operate check
With 995 of the dataset's filings at the USPTO, any new impeller, casing or shroud design should clear US prior art first, then check Europe and Japan for regional variants of the same claim.
Explore in Patsnap EurekaTarget the materials subclasses for filing
C22C alloys, C23C coatings and B22D casting each carry markedly fewer records than F04D pump architecture, suggesting more room to stake out defensible claims on the materials side of durability.
Explore in Patsnap EurekaWatch for renewed filing activity
The decline from 2017 to the present partial year is steep, but publication lag means the true 2025-2026 picture will not be clear for another year or so — worth re-checking before concluding the field has gone quiet for good.
Explore in Patsnap EurekaSource: Patsnap Eureka. Forward-looking reading of the same dataset. Derived from a Patsnap search on Centrifugal Pump Environmental Durability 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 this landscape
No. Filings peaked in 2017 at 160 and have declined fairly steadily since, sitting at 78 by the 2022 midpoint and 17 in the partial 2026 count. Even allowing for the roughly eighteen-month lag between filing and publication that understates the most recent one or two years, the multi-year trend from 2017 onward is a genuine decline. Anyone entering this space now is filing into a mature, consolidating field rather than a growth wave.
F04D, the IPC subclass covering non-positive-displacement pumps, dominates with 745 records out of 3,170 total families, more than double the next largest subclass. That means impeller geometry, casing design and general pump-architecture claims are the most heavily contested ground in this dataset. Materials-focused subclasses such as C22C alloys, C23C coatings and B22D casting carry noticeably fewer filings and represent comparatively more open claim territory.
The United States leads with 995 filings, followed by Europe (EPO) at 396, Japan at 277, China at 269, WIPO/PCT filings at 235, and Canada at 169. A US-first prior-art search is the logical starting point for freedom-to-operate work, with Europe and Japan as the next tier to check for regional variants of the same technology.
US4648808A, assigned to CP Pumpen AG and dated 1987, claims a sealing shroud centrifugal pump design with an inner rotor inside the shroud and an outer rotor connected to the impeller outside it, where the shroud wall is made of an electrically non-conductive material such as ceramic. As a decades-old record, it functions as foundational prior art for magnetically coupled, seal-less pump designs using non-metallic shroud materials. Anyone designing a similar seal-less architecture with ceramic or other non-conductive shroud walls should check this record specifically, even though it predates the bulk of the dataset.
Not clearly. The recent-year momentum figures in this dataset show every tracked assignee filing zero or flat activity in the latest year, several dropping to zero from prior activity, and there are only ten recorded co-assignee pairs across the whole dataset. That pattern is more consistent with a fragmented field of occasional filers than with a small set of companies actively expanding their position, so competitive monitoring should focus on the assignee table directly rather than assuming a single leader sets the pace.
Answers are grounded in the same dataset. Derived from a Patsnap search on Centrifugal Pump Environmental Durability 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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Go past this page: query the whole centrifugal pump environmental durability corpus yourself, in your own scope.
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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.