Soil Bioremediation Patents: Who Leads, Where the Gaps Are 2026
- Top 5 assignees hold 50.0% of the field. 57 of 114 records in scope sit with five companies, with a longer tail of single- and double-filing entrants behind them.
- Filing has plateaued, not grown. 2021 to 2024 — the last complete years — filing held flat at 3 records each, a 0% change once the reporting lag is accounted for.
- Water treatment and soil reclamation dominate the claim space. C02F and B09C together touch two-thirds of records, while enzymatic and microbial-index classes remain comparatively open.
Filing growth compares 2021 (3 records) with 2024 (3) — 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 114 records in scope (CR5), not by the ranked leaders only.
What this landscape covers
This landscape tracks patent activity at the intersection of soil bioremediation and biostimulation amendments — filings that combine electron acceptor chemistry, nutrient amendment, microbial community management, degradation kinetics, contaminant bioavailability or monitoring-well methods with core soil or groundwater treatment claims. The scope spans 2015 through the mid-2026 data cut-off, with 114 records in total and 114 patent families in the assignee ranking, so family counts and record counts read the same across this page.
Because publication trails filing by roughly 18 months, the most recent one to two years in any trend chart will look thinner than they eventually turn out to be. Read the last complete year, not the partial ones, when judging momentum.
Filing trends and technology composition
The underlying dataset spans 114 published records across receiving offices led by the United States, EPO and WIPO's PCT route, with a technology mix concentrated in water treatment and soil reclamation classifications.
A decade of flat-to-modest activity
Filings rose to a peak of 12 in 2020, then settled into a lower, flat band: 2021 and 2024 both recorded 3 filings, a 0% change across that span. Earlier years such as 2017, at 6 filings, sit below the 2020 peak but above the recent plateau, so the field has not simply grown or shrunk in a straight line — it spiked, then flattened.
Water treatment and soil reclamation lead the classification mix
C02F (water and wastewater treatment) appears on 35.1% of the 114 records in scope and B09C (soil and contaminated land reclamation) on 30.7%, making these the two largest technology buckets. C12N (microorganisms and genetic engineering) and B01F (mixing and stirring) follow at 19.3% and 15.8% respectively, while fermentation-based C12P and the microbial-index class C12R each sit near 10%, marking them as comparatively lighter-claimed corners of the same field.
Shares are the percentage of the 114 records in scope. A patent can carry several IPC classes, so the shares add up to more than 100%.
Go deeper on Soil Bioremediation and Biostimulation with Eureka
This page is one run against one query. Ask Eureka your own question about soil bioremediation and biostimulation and every answer comes back with the patent numbers behind it.
Try EurekaMost-cited records and a representative filing
US7384556B2 — Methods of enhancing biodegradation of groundwater contaminants
Systems and methods for co-enhancing contaminant degradation such as LNAPL and DNAPL degradation, by assuring adequate concentrations of substances including nitrogen, electron acceptor, bacteria and microbial substrate. Methods involve amending groundwater with uric acid, electron acceptors or microbial substrate to enhance degradation of both light and dense non-aqueous phase liquids.Filed by Advanced Environmental Technologies LLC, granted 2008-06-10.
| # | Publication no. | Patent title | Citations |
|---|---|---|---|
| 1 | US20020098982A1 | Production and use of biosolid granules | 104 |
| 2 | US6841515B2 | Production and use of biosolid granules | 70 |
| 3 | EP0962492A1 | Use of chitin and/or derivatives thereof as biocatalysts in the remediation of contaminated soils and fluids | 37 |
| 4 | US20030059926A1 | Contaminant eco-remedy and use method | 36 |
| 5 | US5362397A | Method for the biodegradation of organic contaminants in a mass of particulate solids | 34 |
| 6 | US8919743B2 | System and method for dissolving gases in fluids and for delivery of dissolved gases | 28 |
| 7 | US5478464A | Apparatus for the biodegradation of organic contaminants in a mass of particulate solids | 25 |
| 8 | US20090166300A1 | System and method for dissolving gases in fluids and for delivery of dissolved gases | 23 |
| 9 | US8276888B2 | System and method for dissolving gases in fluids and for delivery of dissolved gases | 23 |
| 10 | US20090321350A1 | Method of growing bacteria for use in wastewater treatment | 22 |
Citation counts inside this corpus skew toward older filings, which have had more time to accumulate citations — treat them as a signal of influence on later filings, not of current commercial relevance.
Each row carries its publication number; clicking a row searches Eureka by that number.
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Three patterns matter more than any single ranking: where claim density already sits, how the field's growth has actually behaved, and which citation leaders still shape freedom-to-operate today.
The top of the field is genuinely concentrated
Half of all records in scope sit with five assignees, with the leader alone holding 18. That is a meaningfully tighter cluster than the tenth-place holder's 4, and it means new entrants are filing into a field where the densest claim territory is already staked by a small group.
Growth has stalled, not accelerated
After peaking at 12 filings in 2020, activity settled to 3 filings in both 2021 and 2024 — flat across the last complete reporting window. That plateau, rather than a decline curve, is the honest read once the 2025-2026 filing lag is set aside.
Water treatment and soil reclamation carry the claim load
Water and wastewater treatment (C02F) and soil and contaminated land reclamation (B09C) are the two most-claimed subclasses, together touching roughly two-thirds of records. Microbial-genetics and mixing-equipment classes trail well behind, suggesting the mechanical and biological delivery side of the field is less crowded than the treatment-chemistry side.
Older biosolid-granule patents still anchor the citation graph
The two highest-cited records both concern biosolid granule production, cited 104 and 70 times respectively. Because citation counts accumulate over time, this signals foundational influence on later filings rather than current market weight — newer entrants should check these families for freedom-to-operate before assuming they are settled art.
Eureka can read the same corpus for gaps instead of for coverage: under-claimed branches adjacent to soil bioremediation and biostimulation, with the prior art for and against each one.
| Assignee | Co-assignee | Shared families |
|---|---|---|
| MOL HUNGARIAN OIL & GAS CO | GASOLINESZERVIZ | 5 |
| MOL HUNGARIAN OIL & GAS CO | BAY ZOLTAN FOUND FOR APPLIED RES INST FOR BIOTECH | 5 |
| GASOLINESZERVIZ | BAY ZOLTAN FOUND FOR APPLIED RES INST FOR BIOTECH | 5 |
| The Board of Trustees of the University of Arkansas | TELTSCHIK SHANDI S | 2 |
| The Board of Trustees of the University of Arkansas | OSBORN GREGORY SCOTT | 2 |
| The Board of Trustees of the University of Arkansas | MATLOCK MARTY D | 2 |
| Unified Environmental Services Group LLC | BURNHAM JEFFREY C | 2 |
| Acuabiotec LLC | VILLAMAR DANIEL F | 2 |
Ten co-assignee pairs appear in the dataset, with the strongest links forming a three-way cluster between a national oil and gas company, a specialist service partner and a biotechnology research institute — evidence of regional joint development rather than broad industry-wide co-filing.
Who is filing, and where the gaps sit
The ranked list covers 53 companies across the 114 records in scope — not a top-50 or top-100 cut, but the whole ranking the dataset returns. Filing activity clusters around a handful of leaders with a long tail of single- and double-filing organisations behind them.
A single leader well ahead of fifth place
The top-ranked assignee holds 18 records against 8 for the fifth-place holder — more than double the gap that separates fifth from tenth (4 records). That spread marks a genuine leader rather than a tightly bunched top five.
Most organisations file once or twice
Beyond the leading cluster, the ranking thins quickly into organisations with a small handful of records each. That pattern is typical of a technically fragmented field where regional remediation contractors, agrochemical firms and research institutes each protect narrow, local applications rather than broad platform claims.
Co-filing is regional, not industry-wide
The strongest co-assignee links form a tight triangle between a national oil and gas company, a related service company and a biotechnology institute, each pair appearing together 5 times. That points to a specific national remediation programme rather than a cross-industry standard-setting effort.
| Assignee | Recent year | YoY |
|---|---|---|
| The Board of Trustees of the University of Arkansas | 0 | — |
| TIBIO SAGL | 0 | — |
| Syngenta Crop Protection AG | 0 | -100% |
| Remediation Products Inc. | 0 | — |
| Unified Environmental Services Group LLC | 0 | — |
| Acuabiotec LLC | 0 | — |
| MOL HUNGARIAN OIL & GAS CO | 0 | — |
| DETORRES FERNANDO A | 0 | — |
Where to take this analysis
The dataset points to a field with a settled leadership tier and several narrower branches that have not attracted heavy claim density yet.
Check freedom-to-operate against the citation leaders
The biosolid-granule and chitin-remediation families carry the heaviest citation counts in scope. Any commercial process touching granulated amendments or biocatalytic soil treatment should be checked against these specific families before development proceeds.
Run a freedom-to-operate check in EurekaMap the under-claimed branches against your own process
Enzymatic synthesis, microbial-index classification and bioavailability monitoring all carry comparatively light claim density relative to water treatment and soil reclamation. A first filing there is more likely to find open ground.
Explore white space in EurekaTrack the leading assignee's recent activity
With 18 records, the top-ranked assignee sets the density of the field's core claim territory. Watching its continuation and international filings will show whether that lead is being defended or is starting to open up.
Monitor assignee activity in EurekaCommon questions on this landscape
The dataset behind this landscape contains 114 published records filed or granted between 2015 and the mid-2026 data cut-off, matched against terms covering biostimulation amendments, electron acceptors, nutrient amendment, microbial community management and related monitoring methods. These 114 records also equal 114 patent families in the assignee ranking, so counting by family or by document gives the same total here. The true figure for the very latest years will rise once outstanding applications publish, since publication typically lags filing by around 18 months.
The ranked list covers 53 companies, with the leading assignee holding 18 of the 114 records in scope, well ahead of the fifth-placed holder at 8 and the tenth at 4. The top 5 assignees together account for 50.0% of all records, and the top 10 for 73.7%, which marks this as a field with a clear leadership tier rather than an even spread. Beyond that tier, most other organisations in the ranking hold only one or two records each.
Filing peaked at 12 records in 2020 and has since settled into a lower, flat pattern: 2021 and 2024, the most recent years that can be treated as complete, both recorded 3 filings — a 0% change across that span. That reads as a plateau rather than either sustained growth or a clear decline. Any apparent drop-off in 2025 and 2026 is an artefact of publication lag, not a real slowdown, since recent filings have not all published yet.
Water and wastewater treatment (IPC class C02F) and soil and contaminated land reclamation (B09C) are the two most heavily claimed areas, appearing on 35.1% and 30.7% of the 114 records in scope respectively. Microorganism and genetic-engineering claims (C12N) and mixing equipment (B01F) follow at meaningfully lower shares. Because a single record can carry multiple IPC classes, these percentages add up to more than 100%, and they should be read as claim density per class rather than as a breakdown of a whole.
The classes with the lightest claim density in this dataset are fermentation and enzymatic synthesis (C12P) and the microbial-index class C12R, each appearing on roughly 10% of the 114 records, compared with over 30% for the two leading classes. Contaminant bioavailability monitoring and electron acceptor dosing control also appear as narrower sub-areas without the same density of prior claims. That combination of low record share and technical specificity makes these areas worth checking closely before assuming the space is occupied.
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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.