Phytoremediation Patents: Who Leads, Where the Gaps Are 2026
- Concentration is modest at the top: the leading assignee holds 47 families, and the top 5 combined account for just 22.6% of all 552 records in scope — this is not a field owned by one or two players.
- Filings grew 67% from 2021 to 2024, climbing from 15 to 25 records a year before publication lag makes 2025-2026 look artificially quiet.
- Microorganism and genetic-engineering claims dominate, with C12N covering 44.6% of records, well ahead of soil reclamation (B09C, 28.8%) and water treatment (C02F, 23.9%).
Filing growth compares 2021 (15 records) with 2024 (25) — 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 552 records in scope (CR5), not by the ranked leaders only.
What the patent record shows
Phytoremediation and hyperaccumulator plant patents sit at the intersection of plant biology, soil science and metal recovery. The dataset in scope covers 552 patent families published between 2015 and mid-2026, spanning claims on engineered microorganisms that assist metal uptake, contaminated-soil reclamation methods, and downstream processes for recovering metals from harvested biomass. The field reads as fragmented rather than consolidated: no single assignee holds a commanding share, and the technology composition shows claims split across genetic engineering, soil treatment, water treatment and agrochemical categories rather than clustering around one dominant approach.
Filing activity peaked in 2022 at 27 records and has grown over the 2021-2024 window even as the most recent two years understate true filing volume because of publication lag. Receiving-office data shows the United States as the largest single jurisdiction, with WIPO PCT filings and India close behind, indicating that applicants are pursuing both direct national protection and multi-jurisdiction coverage in parallel.
Filing trends and technology classes
Two views of the same 552-record dataset: how filing volume has moved year over year, and how those records distribute across the IPC subclasses they touch.
Filing trend, 2017-2026
Annual filings rose from 16 in 2017 to a peak of 27 in 2022, then continued upward from 15 in 2021 to 25 in 2024 — a 67% increase over that span. 2025 and 2026 figures are understated because publication typically lags filing by roughly 18 months.
Technology composition by IPC subclass
C12N (microorganisms and genetic engineering) touches 44.6% of the 552 records, the largest single class. B09C (soil reclamation), C02F (water treatment) and C07K (peptides and proteins) each cover roughly a quarter of records. Because a single record can carry multiple IPC classes, these shares sum to well over 100% and should not be added together.
Shares are the percentage of the 552 records in scope. A patent can carry several IPC classes, so the shares add up to more than 100%.
Go deeper on Phytoremediation and Hyperaccumulator Plants with Eureka
This page is one run against one query. Ask Eureka your own question about phytoremediation and hyperaccumulator plants and every answer comes back with the patent numbers behind it.
Try EurekaMost-cited and most recent filings
WO2025229028A1 — Process for recovering nickel from nickel-hyperaccumulator plant biochar
The invention relates to a process for recovering nickel from nickel-hyperaccumulator plant biochar, wherein said plant has an induced polyploid or mixoploid genome, preferably a tetraploid or mixoploid plant. The process leaches the biochar with an aqueous mineral acid, precipitates and removes iron from the resulting leachate to yield a nickel-enriched solution, then extracts and optionally crystallises nickel from that solution.Filed by GENOMINES, published November 2025 — a downstream metal-recovery process built on engineered hyperaccumulator biomass rather than on the uptake step itself.
| # | Publication no. | Patent title | Citations |
|---|---|---|---|
| 1 | US20060150283A1 | Sequence-determined DNA fragments and corresponding polypeptides encoded thereby | 508 |
| 2 | US20190259108A1 | Controlled Agricultural Systems and Methods of Managing Agricultural Systems | 332 |
| 3 | US20070214517A1 | Sequence-determined DNA fragments and corresponding polypeptides encoded thereby | 314 |
| 4 | US20200184153A1 | Controlled Agricultural Systems and Methods of Managing Agricultural Systems | 172 |
| 5 | US5863433A | Reciprocating subsurface-flow constructed wetlands for improving wastewater treatment | 168 |
| 6 | US10197338B2 | Building system for cascading flows of matter and energy | 120 |
| 7 | WO2002065836A2 | Delivery systems for mycotechnologies, mycofiltration and mycoremediation | 99 |
| 8 | US20120084885A1 | Promoter, promoter control elements, and combinations, and uses thereof | 96 |
| 9 | US20040211721A1 | Delivery systems for mycotechnologies, mycofiltration and mycoremediation | 89 |
| 10 | US20160108096A1 | Fusion proteins, recombinant bacteria, and methods for using recombinant bacteria | 85 |
Citation counts favour older records simply because they have had more time to accumulate citations within the searched corpus; treat them as a signal of influence on the field, not as a measure of current commercial importance.
Each row carries its publication number; clicking a row searches Eureka by that number.
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Three findings that shape where a new filer should and shouldn't spend claim-drafting effort.
No single owner blocks the field
The leading assignee holds 47 families out of 552, and the top 5 combined reach only 22.6% of all records in scope. That is a long tail of single- and few-filing entrants rather than a market gated by two or three incumbents, which lowers freedom-to-operate risk for a well-drafted new application.
Momentum is real, not an artifact
Annual filings rose from 15 in 2021 to 25 in 2024, a 67% increase over three years, with 2022 the peak year so far at 27. The apparent dip in 2025-2026 is a publication-lag effect, not a genuine slowdown, and should not be read as the field cooling.
Biology, not civil engineering, dominates claims
Genetic-engineering and microorganism claims (C12N) appear in 44.6% of the 552 records, ahead of soil reclamation (28.8%), water treatment (23.9%) and peptide/protein claims (23.0%). Filers positioning around mechanical or civil remediation infrastructure alone are working in a thinner-claimed corner of the field.
Eureka can read the same corpus for gaps instead of for coverage: under-claimed branches adjacent to phytoremediation and hyperaccumulator plants, with the prior art for and against each one.
Who is filing, and where the gaps sit
The assignee ranking covers 100 companies counted in records, from a leader with 47 families down through a long tail of occasional filers. Recent-year momentum data shows several of the more active historical names — including EDENSPACE SYSTEMS CORP and other ranked assignees — recording zero filings in the latest year, consistent with the broader publication-lag pattern rather than necessarily a strategic exit.
A wide but not dominant lead
The top-ranked assignee holds 47 of the 552 families in scope, well ahead of fifth place at 14 and tenth place at 11. That gap shows real specialisation at the top without approaching market control.
A tight cluster just below the leader
Ranks five through ten sit close together, between 11 and 14 families each, suggesting several organisations are filing at comparable, moderate volumes rather than one clear second-place challenger emerging.
Collaboration is limited and concentrated
Only 10 co-assignee pairs appear across the dataset, and the strongest pairing recurs six times. Joint filing is the exception here, not the norm, which means most claim positions are being built by single organisations working alone.
| Assignee | Recent year | YoY |
|---|---|---|
| Spogen Biotech Inc. | 0 | -100% |
| Marrone Bio Innovations Inc. | 0 | — |
| EDENSPACE SYSTEMS CORP | 0 | — |
| Agri Victoria Services Pty Ltd | 0 | — |
| Lovely Professional University | 0 | -100% |
| Osram GmbH | 0 | — |
| Plant Technology Ltd. | 0 | — |
| MELSHEIMER KEVIN HANS | 0 | — |
Where to take this analysis
The dataset points to specific next steps depending on whether the goal is freedom-to-operate, portfolio building, or scouting for licensing partners.
Map claims against the under-claimed branches
Biomass disposal, chelate-assisted uptake and field-scale demonstration protocols carry lower filing density than core microbial and soil-treatment claims, making them worth a closer freedom-to-operate check before drafting.
Explore white space in EurekaTrack the mid-field cluster, not just the leader
With ranks five through ten bunched between 11 and 14 families, competitive shifts are more likely to come from this cluster than from the top-ranked assignee alone.
Monitor assignee activity in EurekaWatch downstream metal-recovery claims
Recent filings such as WO2025229028A1 show claim activity moving from uptake biology toward post-harvest metal recovery from biochar, a direction worth tracking separately from the core hyperaccumulator plant claims.
Search recent filings in EurekaCommon questions on this landscape
The leading assignee in this dataset holds 47 of the 552 patent families in scope, with the top five combined accounting for 22.6% of all records. That is a meaningful lead over fifth place, which sits at 14 families, but it is far from market control — the field has a long tail of single- and few-filing organisations rather than two or three dominant owners. Anyone assessing freedom-to-operate should look at the mid-field cluster around ranks five to ten as closely as the top name, since several organisations file at comparable, moderate volumes there.
Filings grew from 15 records in 2021 to 25 in 2024, a 67% increase over that three-year span, with 2022 standing as the peak year so far at 27 records. The apparent decline visible in 2025 and 2026 data is a publication-lag artifact rather than a real slowdown — patent publication typically trails filing by around 18 months, so the most recent one to two years in any patent dataset always look thinner than they will once fully published. Based on the 2021-2024 trend, the underlying filing rate has been rising, not falling.
Microorganism and genetic-engineering claims (IPC class C12N) appear in 44.6% of the 552 records in scope, making it the single largest technology category. Soil and contaminated-land reclamation (B09C) follows at 28.8%, with water and wastewater treatment (C02F) at 23.9% and peptide and protein claims (C07K) at 23.0%. Because individual records often carry more than one IPC class, these percentages overlap and should be read as separate slices of the same 552-record base, not as parts of a single pie that sums to 100%.
WO2025229028A1, filed by GENOMINES and published in November 2025, covers a process for recovering nickel from biochar made from nickel-hyperaccumulator plants with an induced polyploid or mixoploid genome. The claimed steps run from acid leaching of the biochar through iron precipitation and removal, to extraction and optional crystallisation of nickel from the resulting nickel-enriched solution. It is a downstream metal-recovery process built on top of hyperaccumulator biomass rather than a claim on the plant's uptake mechanism itself, which matters for anyone trying to determine whether their own process falls inside or outside its scope.
The technology composition data shows lower filing density in areas like chelate-assisted uptake optimisation, field-scale demonstration protocols and post-harvest biomass disposal compared with the heavily claimed core areas of microbial engineering and soil reclamation. These are not gaps in scientific interest so much as gaps in claim coverage, which typically means the underlying methods are documented in literature but have not been heavily reduced to patent claims. A first filer in one of these branches would want to draft narrowly around a specific process step — such as a defined chelate dosing protocol or a specific field-trial monitoring method — rather than a broad method-of-use claim, given the thinner but not empty prior art around it.
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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.