Fastest
Eureka on the web
When you want the answer in the next five minutes.
The agent works the prompt against patents and technical literature, citing every source.
Run your analysis now →https://www.patsnap.com/resources/blog/rd-blog/pumps-for-corrosive-and-abrasive-service-patent-landscape/ · Patsnap · data cut-off 2026-07-31 · downloaded from the live page
Patent Landscape BriefPumps for Corrosive and Abrasive Service: Patent Filing Trends and Who Holds the Ground
- Filing activity peaked in 2023 at 101 families and has since flattened, with the partial 2026 count of 6 still understated by publication lag.
- China dominates the filing map with 672 of 947 families routed through its receiving office, versus 58 in the United States and 52 at the EPO.
- No single assignee is pulling away recent-year momentum shows the most active organisations filing at most 1 new family in the latest year, pointing to a fragmented, long-tail field.
947
Published Records
13%
Top-5 Share of All Records
+6%
3-Yr Growth (lag-adjusted)
CN
Leading Jurisdiction
Published byPatsnap Research··7 min readSourced from Patsnap Eureka
Field Overview
What this landscape covers
This dataset tracks patent families combining chemical process pump, magnetic drive pump and slurry pump terminology with claims touching seal-less design, wear part material, NPSH requirement, dry run protection and efficiency, classified under the non-positive-displacement pump subclasses F04D7, F04D29 and F04D13.
The corpus spans 2015 to a mid-2026 cut-off and covers 947 published families. Filing is heavily concentrated in China's receiving office, with a much smaller but still meaningful spread across the United States, Europe, Australia, Canada and the PCT route.
Filing volume by year, 2017-2026
Source: Patsnap Eureka. Assignee ranking and totals. Derived from a Patsnap search on Pumps for Corrosive and Abrasive Service 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 Numbers
Filing trend and technology composition
Filings rose steadily through the late 2010s, peaked in 2023, and have since pulled back — a pattern consistent with a maturing claim space rather than an emerging one.
A peak-then-plateau trend
Annual filings climbed from 26 in 2017 to a peak of 101 in 2023. The 2022 midpoint of 92 sits close to that peak, and the count has since flattened or declined; the low 2026 figure of 6 reflects a partial year and publication lag, not a real collapse in activity.
F04D dominates, with motor and wear-material spillover
Every record in this set carries an F04D classification by construction. Beyond that core, the next-largest adjacent codes are H02K (electric motors, 30 records), B01D (separation processes, 24), and B02C (crushing and grinding, 21) — signalling that drive integration, filtration and material-handling wear are the most common secondary claim territories, while sealing (F16J, 10) and positive-displacement alternatives (F04B, 8) are comparatively thin.
Shares are the percentage of the 947 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 Pumps for Corrosive and Abrasive Service covering 2015–2026, data cut-off 2026-07-31. Counts reflect published records only and shift as new filings publish.
Go deeper on Pumps for Corrosive and Abrasive Service with Eureka
This page is one run against one query. Ask Eureka your own question about pumps for corrosive and abrasive service and every answer comes back with the patent numbers behind it.
Try EurekaPrior Art
Key patents shaping the field
Representative Filing
High-temperature magnetic drive pump design method (EP4411142A1)
HANGZHOU DALU INDUSTRY CO., LTD.
The filing describes a design and development method for a high-temperature magnetic drive pump, centred on a bearing seat with uniformly arranged spiral gaps around the inner-hole surface. The method calculates differential thermal expansion at the mating surface between the bearing seat and sleeve bearing across the range from room temperature to the pump's design temperature, then sizes the inner hole accordingly.Filed by Hangzhou Dalu Industry Co., Ltd., published 2024-08-07.
Most-cited records
| # | Publication no. | Patent title | Citations |
|---|---|---|---|
| 1 | US3973866A | Centrifugal chopping slurry pump | 90 |
| 2 | US4913619A | Centrifugal pump having resistant components | 83 |
| 3 | US4842479A | High head centrifugal slicing slurry pump | 79 |
| 4 | US4521151A | Centrifugal slurry pump | 72 |
| 5 | US4575306A | Slurry pump mechanical seal mounting assembly | 71 |
| 6 | US5797724A | Pump impeller and centrifugal slurry pump incorporating same | 65 |
| 7 | US4872809A | Slurry pump having increased efficiency and wear characteristics | 56 |
| 8 | US4802818A | Slurry pump suction side liner with replaceable components | 51 |
| 9 | US7249939B2 | Rear casing arrangement for magnetic drive pump | 50 |
| 10 | US6033187A | Method for controlling slurry pump performance to increase system operational stability | 49 |
Citation counts reflect influence within the searched corpus and skew toward older filings; treat them as a signal of historical importance rather than current filing strength.
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 Pumps for Corrosive and Abrasive Service 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
Run it yourself
Put your own technology through the same analysis
Where to run it
For builders
MCP server & REST API
When it has to run inside your own pipeline.
Patent search, landscape analysis and assignee resolution as MCP tools. Drop them into any agent framework, or call REST directly.
Browse MCP servers →Analysis
What the filing pattern signals
Three things stand out once the raw counts are put in context: where the claim density sits, where it thins out, and what the citation record tells a freedom-to-operate review.
Filing Trend
101 in 2023
peak year
Growth has plateaued, not accelerated
The run-up from 26 filings in 2017 to 101 in 2023 looks like a field working through a known set of design problems rather than opening a new one. The pullback since the midpoint year of 92 in 2022 suggests the core mechanical claims — seal-less drive, wear-resistant housings, NPSH handling — are largely staked out.
Interpret the 2026 partial figure with the 18-month publication lag in mind.
Geographic Concentration
672 of 947
filed via China
Filing is overwhelmingly China-routed
China accounts for 672 of the 947 families, dwarfing the United States (58), EPO (52), Australia (41), Canada (33) and WIPO (21). That concentration points to a domestic manufacturing base filing defensively around incremental mechanical variants, with far less pressure to secure broad international coverage.
A design cleared in one jurisdiction may still face a dense China filing thicket.
Citation Pattern
90 citations
top-cited record
The most-cited art is decades old
The most-cited records — centrifugal chopping and slicing slurry pumps, resistant-component centrifugal pumps, mechanical seal mounting assemblies — are legacy filings still shaping how new claims are drafted around wear parts and sealing. Their persistence as reference points suggests the foundational mechanical architecture hasn't been displaced, only refined.
High citation counts favour older records in any searched corpus; treat them as influence, not current relevance.
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 pumps for corrosive and abrasive service, with the prior art for and against each one.
Source: Patsnap Eureka. Co-assignee relationships and derived observations. Derived from a Patsnap search on Pumps for Corrosive and Abrasive Service 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
Competitive Landscape
Who holds the ground, and where the gaps sit
No assignee shows strong recent-year momentum: the most active organisations in this set filed at most a single family in the latest year, and several show zero. Collaboration is limited to a handful of co-assignee pairs, the strongest linking a Chinese blower manufacturer with a mining university.
Co-Filing Pattern
16 shared families
strongest pair
Industry-academia pairing leads collaboration
The strongest co-assignee link in the dataset pairs a Shandong blower manufacturer with China University of Mining and Technology across 16 shared families, suggesting applied research on abrasive-duty pump components conducted jointly with an academic partner.
Only 10 co-assignee pairs appear in total across 947 families.
Recent Momentum
1 filing
latest-year leader
No assignee is pulling ahead
Recent-year filing counts across the most visible assignees top out at a single family, with several established names showing zero. That flatness across the leaderboard, combined with the 2023 peak already behind it, points to a field where existing players are holding position rather than expanding it.
A fragmented long tail of single-filing entrants fills out the remainder of the corpus.
Regional Base
672 CN filings
receiving office
Manufacturing base concentrated in China
The bulk of assignees filing in this space are Chinese pump and mining-equipment manufacturers, with a smaller number of international players — including Australian and European mineral-processing equipment groups — appearing through their own co-assignee pairings.
International filers tend to pair a domestic and a regional entity rather than filing solo abroad.
Recent-year filing momentum by assignee
| Assignee | Recent year | YoY |
|---|---|---|
| China University of Mining and Technology | 1 | — |
| Weir Minerals Australia Ltd | 0 | — |
| Sanlian Pump Industry Co., Ltd. | 0 | — |
| Shandong Zhangqiu Blower Co., Ltd. | 0 | — |
| Magnatex Pumps, Inc. | 0 | — |
| Metso Sweden AB | 0 | — |
| VAUGHAN CO INC | 0 | — |
| GIW IND INC | 0 | — |
Source: Patsnap Eureka. Assignee-level momentum. Derived from a Patsnap search on Pumps for Corrosive and Abrasive Service 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
Next Steps
Where to take this next
The dataset points to specific follow-up questions depending on whether the goal is freedom-to-operate, whitespace filing, or competitive tracking.
Check the China filing thicket directly
With 672 of 947 families routed through China, any design intended for that market needs a dedicated search against the domestic assignee base rather than relying on international counterparts.
Run a targeted China searchMap the wear-material and sealing claims
F16J sealing (10 records) and wear-part material claims sit thinner than the core mechanical architecture — worth a closer read before assuming the space is closed.
Explore adjacent IPC codesTrack the flat leaderboard for shifts
With no assignee showing strong recent momentum, a new entrant with a clear technical angle could move quickly in this field.
Set up assignee monitoringSource: Patsnap Eureka. Forward-looking reading of the same dataset. Derived from a Patsnap search on Pumps for Corrosive and Abrasive Service 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 on this landscape
No single assignee has a dominant or fast-growing position in this dataset. The strongest collaborative link pairs a Shandong blower manufacturer with China University of Mining and Technology across 16 shared families, and several other Chinese pump manufacturers and international mineral-processing equipment groups appear repeatedly, but recent-year filing counts for even the most visible names top out at a single family. This points to a fragmented field with a long tail of single- or low-filing entrants rather than one or two companies controlling the core claims.
Filing activity rose from 26 families in 2017 to a peak of 101 in 2023, then flattened or declined through the following years. The 2022 figure of 92 sits close to that peak, suggesting the growth phase has already passed. The low count shown for 2026 is a partial year and understated by the typical 18-month gap between filing and publication, so it should not be read as a sudden drop-off.
China accounts for 672 of the 947 families in this dataset, far ahead of the United States at 58, the European Patent Office at 52, Australia at 41, Canada at 33, and the WIPO PCT route at 21. This concentration reflects a large domestic manufacturing base for slurry and chemical process pumps filing primarily for domestic protection, with comparatively limited pursuit of broad international coverage.
Relative to the dense core of centrifugal and slurry pump mechanical claims under F04D, several adjacent areas show thinner filing: dry-run protection sensing integration, thermal expansion compensation in magnetic coupling designs, detailed wear-part material composition claims, and in-line NPSH monitoring. Positive-displacement hybrid designs overlapping F04B are also comparatively sparse at only 8 records. These are worth checking specifically before assuming a design direction is already occupied, since overall filing density is driven by classic centrifugal and slicing-slurry-pump architecture.
EP4411142A1, filed by Hangzhou Dalu Industry Co., Ltd. and published 2024-08-07, describes a design and development method for a high-temperature magnetic drive pump. Its core technical contribution is a bearing-seat structure with spiral gaps arranged around the inner-hole surface, sized using a calculation of differential thermal expansion between the bearing seat and sleeve bearing across the pump's operating temperature range. It is a design methodology claim rather than a broad pump architecture claim, so it primarily constrains high-temperature magnetic-drive bearing-seat sizing approaches rather than seal-less pumps generally.
Answers are grounded in the same dataset. Derived from a Patsnap search on Pumps for Corrosive and Abrasive Service 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
Research Pumps for Corrosive and Abrasive Service in depth with Eureka
Go past this page: query the whole pumps for corrosive and abrasive service corpus yourself, in your own scope.
Every answer comes back with patent numbers you can open.
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.