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Run your analysis now →https://www.patsnap.com/resources/blog/rd-blog/heavy-oil-surface-processing-and-diluent-patent-landscape/ · Patsnap · data cut-off 2026-07-31 · downloaded from the live page
Patent Landscape · Heavy Oil Surface ProcessingHeavy Oil Surface Processing and Diluent Patents: Who Leads, Where the Gaps Are
- Filing has fallen sharply since its 2020 peak of 47. 2021 to 2024 filings dropped 96%, from 24 to 1, tracking a mature, heavily claimed field rather than an expanding one.
- One assignee sits well ahead of the rest. The leader holds 95 records against a fifth-place figure of 24 and a tenth-place figure of 6 — a steep drop-off after the top few names.
- Canada dominates the receiving offices. 180 of the tracked records were filed via Canada against 100 in the United States and 18 through WIPO, reflecting the oil sands origin of this technology.
298
Published Records
-96%
Filing Growth 2021→2024
CA
Leading Jurisdiction
43
Active Filers Ranked
Filing growth compares 2021 (24 records) with 2024 (1) — 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.
Published byPatsnap Research··7 min readSourced from Patsnap Eureka
Field Overview
What this landscape covers
Heavy oil surface processing and diluent technology covers the equipment and chemistry used once bitumen or heavy crude reaches the surface: diluent blending to make the material pumpable, bitumen froth treatment to separate hydrocarbon from water and solids, and the downstream handling of froth treatment tailings. The dataset behind this page draws on 298 published records filed between 2015 and 2026, searched against terms covering emulsion breaking chemicals, free water knockout, naphthenic froth treatment, froth treatment tailings, diluent recovery units and inclined plate settlers.
Because publication typically lags filing by around 18 months, the most recent one to two years in any trend understate real filing activity — 2026 in particular should be read as incomplete rather than as a drop-off.
Filing activity and technology composition, 2015-2026
Source: Patsnap Eureka. Assignee ranking and totals. Derived from a Patsnap search on Heavy Oil Surface Processing and Diluent 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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The Numbers
Filing trends and technology composition
The filing curve and the IPC composition together show a field that built up quickly around oil sands operators, peaked, and has since been dominated by consolidation of existing claim positions rather than new entrants.
A sharp pull-back from a 2020 peak
Filings rose from 14 in 2017 to a peak of 47 in 2020, then declined; the 2021-to-2024 span alone shows a 96% drop, from 24 filings to 1. Readers should treat 2025 and 2026 figures as still filling in rather than as confirmation of continued decline.
Refining and tar/pitch classes dominate
C10G (hydrocarbon oils and refining) appears on 69.8% of the 298 records in scope, far ahead of C10C (tar and pitch, 18.5%), B01D (separation processes, 17.4%), B03B (wet separation of solids, 17.1%) and B03D (flotation, 16.8%). Because records can carry multiple IPC classes, these shares add to well over 100% and should not be summed as a single total.
Shares are the percentage of the 298 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 Heavy Oil Surface Processing and Diluent covering 2015–2026, data cut-off 2026-07-31. Counts reflect published records only and shift as new filings publish.
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The most-cited records in this landscape
Representative Filing
Process for recovering bitumen from froth treatment tailings
TITANIUM CORPORATION INC.
The representative record describes a multi-stage route for recovering bitumen from froth treatment tailings: a first solvent extraction step separates a bitumen-bearing extract from a raffinate, which is then split by particle size into fine and coarse mineral fractions, with the coarse fraction subjected to a froth flotation step to recover further bitumen values.Filed by Titanium Corporation Inc., published 2018-07-10.
Highest-citation patents in scope
| # | Publication no. | Patent title | Citations |
|---|---|---|---|
| 1 | US20060196812A1 | Zone settling aid and method for producing dry diluted bitumen with reduced losses of asphaltenes | 131 |
| 2 | US20100126906A1 | Process For Recovering Solvent From Ashphaltene Containing Tailings Resulting From A Separation Process | 83 |
| 3 | US7438807B2 | Bituminous froth inclined plate separator and hydrocarbon cyclone treatment process | 73 |
| 4 | US6358404B1 | Method for recovery of hydrocarbon diluent from tailing | 71 |
| 5 | US6358403B1 | Process for recovery of hydrocarbon from tailings | 68 |
| 6 | US20060138036A1 | Bituminous froth inclined plate separator and hydrocarbon cyclone treatment process | 48 |
| 7 | US20090200209A1 | Upgrading Bitumen In A Paraffinic Froth Treatment Process | 41 |
| 8 | US20200332198A1 | Monitoring of residual metals in paraffinic froth treatment operations and process control | 33 |
| 9 | CA2272045A1 | Method for recovery of hydrocarbon diluent from tailings | 28 |
| 10 | CA2614669A1 | An improved process for recovering solvent from asphaltene containing tailings resulting from a separation pr… | 25 |
Citation counts reflect influence within the searched corpus and skew toward older filings; a low-citation recent filing is not necessarily a weak one.
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 Heavy Oil Surface Processing and Diluent 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 data means for a filing decision
Three patterns stand out once the ranking, the trend and the IPC composition are read together: a mature core claim space, a citation base weighted toward older art, and a filing curve that has been shrinking for several complete years running.
Filing Activity
-96% (2021→2024)
three-year filing change
The core claim space is largely settled
Filings fell from 24 in 2021 to 1 in 2024, following a 2020 peak of 47. That pattern is consistent with a field where the dominant process routes — froth treatment, diluent recovery, tailings solvent extraction — were claimed early and heavily, leaving incremental filers with less open ground.
Based on complete-year filing counts through 2024.
Citation Concentration
131 citations (top record)
highest citation count in set
Influence sits with early froth-treatment and tailings patents
The most-cited records address zone settling, solvent recovery from asphaltene-containing tailings, and inclined plate separation — foundational mechanical and chemical steps that later filings tend to reference rather than replace.
Citation counts favour older records within the searched corpus.
Assignee Structure
95 vs 24 vs 6
leader / fifth / tenth place record counts
A steep drop after the leading few filers
The leading assignee holds 95 records, fifth place holds 24 and tenth place holds just 6, across 43 ranked companies. That shape points to one or two operators with entrenched process patent estates and a long tail of single- or few-filing entrants.
Counted in records across the 43-company ranking.
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Co-filing patterns
| Assignee | Co-assignee | Shared families |
|---|---|---|
| TRUENORTH ENERGY CORP | VAN DER MERWE SHAWN | 7 |
| VAN DER MERWE SHAWN | HANN TOM | 7 |
| SURY KEN N | SUTTON CLAY R | 6 |
| SURY KEN N | KIEL DARWIN EDWARD | 6 |
| VAN DER MERWE SHAWN | HANN THOMAS | 5 |
| SURY KEN N | DIEP JOHN KHAI QUANG | 4 |
| TRUENORTH ENERGY CORP | HANN TOM | 3 |
| VAN DER MERWE SHAWN | GRAPPOLINI BENJAMIN JOHN | 3 |
The strongest co-assignee pairings recur around a small number of individual inventors tied to a single corporate assignee, suggesting internal inventor teams rather than cross-company joint filings.
Source: Patsnap Eureka. Co-assignee relationships and derived observations. Derived from a Patsnap search on Heavy Oil Surface Processing and Diluent 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
Who's Filing
The assignee landscape
Filing in this field is dominated by oil sands operators and the engineering arms of major integrated producers, with a long tail of smaller technology specialists and individual inventors.
Leader
95 records
records held by the top assignee
A single dominant filer
The leading assignee's record count is roughly four times that of the fifth-placed filer, indicating a company that has built and defended a broad process patent estate around froth treatment and tailings handling over multiple years.
Ranked by records in the 43-company assignee list.
Mid-Tier
24 records (5th place)
fifth-place record count
A cluster of established operators
Below the leader sits a group of integrated oil sands and upstream research entities filing at a steady but lower rate, consistent with defending specific unit-operation improvements rather than covering the full process chain.
Includes major upstream research and oil sands investment entities.
Long Tail
6 records (10th place)
tenth-place record count
Many single- and few-filing entrants
Beyond the top ten, record counts fall quickly, and the ranking includes individual named inventors alongside corporate assignees — a sign that some of the most cited early innovation came from small teams rather than large R&D organisations.
43 companies make up the full ranked list; this is not a top-50 or top-100 cut.
Recent-year filing momentum
| Assignee | Recent year | YoY |
|---|---|---|
| TRUENORTH ENERGY CORP | 0 | — |
| Syncrude Canada Ltd | 0 | — |
| Suncor Energy Inc | 0 | — |
| IMPERIAL OIL RESOURCES LTD | 0 | — |
| ExxonMobil Technology & Engineering Co | 0 | — |
| VAN DER MERWE SHAWN | 0 | — |
| ExxonMobil Upstream Research Company | 0 | — |
| TITANIUM CORP | 0 | — |
Source: Patsnap Eureka. Assignee-level momentum. Derived from a Patsnap search on Heavy Oil Surface Processing and Diluent 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 analysis
The dataset points to a field with settled core claims and a shrinking filing rate, but under-claimed process variants remain open for a first mover with the right technical angle.
Map claim boundaries on the most-cited patents
Before drafting around froth treatment or tailings solvent recovery, review the claim scope of the highest-cited records directly rather than relying on their abstracts.
Explore citation network in EurekaTrack the leading assignee's recent filings
Confirm whether the leading filer's estate has genuinely gone quiet or whether unpublished applications are still in the pipeline, given the 18-month publication lag.
Set up assignee monitoring in EurekaTest white space claims against prior art
Run the under-claimed sub-areas identified here — diluent recovery efficiency, froth treatment chemistry, dewatering analytics — against full-text prior art before committing to a drafting direction.
Run a white space search in EurekaSource: Patsnap Eureka. Forward-looking reading of the same dataset. Derived from a Patsnap search on Heavy Oil Surface Processing and Diluent 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
One assignee leads the ranked list with 95 records, well ahead of the fifth-place company at 24 and the tenth-place company at 6, out of 43 ranked companies total. That gap indicates a single operator with a broad, long-standing process patent estate covering froth treatment and tailings handling. Smaller filers, including individual named inventors, make up most of the remaining ranked list, each holding comparatively few records.
Filings peaked at 47 in 2020 and fell to 1 by 2024, a 96% drop from the 2021 figure of 24. This pattern typically reflects a field where core process routes — diluent blending, froth treatment, tailings solvent recovery — were claimed early, leaving less open ground for new filings. It does not necessarily mean the underlying technology has stopped developing; recent years, including 2025 and 2026, are also understated because patent publication lags filing by roughly 18 months.
Bitumen froth treatment separates hydrocarbon bitumen from water and fine solids after primary extraction from oil sand ore, typically using a diluent along with inclined plate separation, flotation or gravity settling. It is the operational bottleneck between extraction and pipeline-ready product, which is why C10G (hydrocarbon oils and refining) appears on 69.8% of the 298 records in this dataset and why the most-cited patents in the field address froth separation and tailings solvent recovery specifically.
Sub-areas such as naphthenic froth treatment chemistry, inclined plate settler geometry, diluent recovery unit energy efficiency, and fine tailings dewatering analytics show comparatively lower claim density than the core froth-treatment and tailings-recovery routes. These are narrower technical branches rather than open general claims, so a workable filing strategy typically targets a specific process parameter or chemistry variant within one of them rather than the underlying separation method itself.
Canada is the leading receiving office with 180 of the tracked records, reflecting the concentration of oil sands operations and their associated engineering activity, followed by the United States with 100 and WIPO/PCT filings with 18. Any freedom-to-operate review in this space should prioritise Canadian and US filings first, then check PCT applications for jurisdictions not yet nationalised.
Answers are grounded in the same dataset. Derived from a Patsnap search on Heavy Oil Surface Processing and Diluent 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.