Hydrocarbon Dew Point Control Patents: Leaders & White Space 2026
- Concentrated at the top. The five most active filers hold 93 of 154 records in scope (60.4%), and the top ten hold 81.2% — a narrow group of assignees controls most of the documented claim space.
- Valve and separation hardware dominate over chemistry. F25J gas liquefaction/separation (26.0%) and B01D separation processes (24.7%) outrank C09K materials formulations (13.6%), showing most protected ground is mechanical, not additive-based.
- Filing activity peaked in 2019 at 15 records and has not been matched since, though the most recent year is always undercounted because publication lags filing by roughly 18 months.
Top-5 share is the combined record count of the five largest assignees divided by all 154 records in scope (CR5), not by the ranked leaders only.
What hydrocarbon dew point control patents actually cover
Hydrocarbon dew point control spans the equipment and chemistry used to strip natural gas liquids from produced gas before it enters a pipeline or LNG train: low-temperature separators, Joule-Thomson valves, mechanical refrigeration chillers, and the hydrate inhibitors and adsorbents that keep those systems running without freezing up. The 154 records in scope sit at the intersection of process hardware and specialty chemistry, which is why the IPC composition spreads across gas separation, valves, hydrocarbon refining and materials classes rather than clustering in one bucket.
Filing has been active but not accelerating: the trend peaked in 2019 and growth since is not reliably computable from the years available, since the most recent filing years are still being published. Receiving-office data shows the United States, PCT/WIPO and Europe carrying the bulk of filings, with Australia, Canada and the United Kingdom forming a secondary tier — consistent with a technology tied to gas processing infrastructure in a handful of producing and importing jurisdictions.
Filing trends and technology composition
Two views of the same 154 records: the filing trend by publication year, and the IPC subclasses that describe what is actually being claimed.
Filing trend
Filings peaked at 15 records in 2019 and have not returned to that level since; the final one or two years in the chart are understated because publication trails filing by roughly 18 months, so a flat or falling recent line should not be read as declining interest.
IPC subclass composition
F25J (gas liquefaction and separation) and B01D (separation processes) each cover roughly a quarter of the 154 records, with C10L, F16K, C07C and C10G close behind — because a single record can carry several IPC classes, these shares add up to well over 100% and should be read against the 154-record total, not against each other.
Shares are the percentage of the 154 records in scope. A patent can carry several IPC classes, so the shares add up to more than 100%.
Go deeper on Hydrocarbon Dew Point Control with Eureka
This page is one run against one query. Ask Eureka your own question about hydrocarbon dew point control and every answer comes back with the patent numbers behind it.
Try EurekaMost-cited records and a representative filing
Fuel Gas Conditioning System and Process to Improve Output Gas Quality
The filing describes a refrigeration system that runs a two-mode cycle: mode 1 builds up a reservoir of cooled refrigerant before any unconditioned gas is processed, and mode 2 uses that stored refrigerant inventory to continuously chill feed gas and strip out natural gas liquids (predominantly ethane, propane, butane and condensate) without a ramp-up delay.The pre-chilled refrigerant reservoir is the operative idea: it removes the startup lag that conventional mechanical refrigeration chillers face when brought online against a variable feed gas stream.
| # | Publication no. | Patent title | Citations |
|---|---|---|---|
| 1 | US4748011A | Method and apparatus for sweetening natural gas | 185 |
| 2 | US7442233B2 | Integrated heavy hydrocarbon removal, amine treating and dehydration | 68 |
| 3 | US20070006732A1 | Integrated heavy hydrocarbon removal, amine treating and dehydration | 50 |
| 4 | WO2006070020A1 | Throttling valve and method for enlarging liquid droplet sizes in the throttled fluid stream | 43 |
| 5 | US20080173363A1 | Throttling Valve and Method for Enlarging Liquid Droplet Sizes in the Throttled Fluid Stream | 37 |
| 6 | US20070006729A1 | Integrated heavy hydrocarbon removal, amine treating and dehydration | 33 |
| 7 | WO2007005979A2 | Integrated heavy hydrocarbon removal, amine treating and dehydration | 30 |
| 8 | WO2011135335A2 | Process and apparatus for the liquefaction of natural gas | 24 |
| 9 | US7396388B2 | Integrated heavy hydrocarbon removal, amine treating and dehydration | 23 |
| 10 | US20120285546A1 | Tapered throttling valve | 21 |
Citation counts favour older documents simply because they have had longer to accumulate citations inside this corpus; treat them as a signal of influence on later filings, not as a ranking of current commercial importance.
Each row carries its publication number; clicking a row searches Eureka by that number.
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Browse MCP servers →What the numbers mean for filing strategy
Three read-outs from the dataset that matter for anyone deciding where to file, litigate or license next.
A small group controls most of the claim space
The five most active assignees account for 93 of the 154 records in scope, and the ranked ten reach 81.2%. New entrants filing broad mechanical-separation claims are filing into ground that a handful of established players already occupy.
Hardware claims outnumber materials claims
F25J gas separation and B01D separation processes each cover roughly a quarter of records, while C09K materials formulations sit at 13.6%. The imbalance suggests chemistry-side claims — inhibitor and adsorbent formulations specifically — are comparatively less crowded than the mechanical separation hardware around them.
Activity has not resumed its 2019 pace
The filing trend peaked at 15 records in 2019 and has since run below that level, though the last one to two years understate true activity because publication trails filing by around 18 months. A growth rate is not reliable to state from the years available.
Older sweetening and dehydration patents anchor the field
The most-cited record in the dataset addresses natural gas sweetening broadly rather than dew point control specifically, and the next tier covers integrated heavy hydrocarbon removal and throttling valve design — evidence that today's dew-point-specific filings build on older, broader gas-treatment art.
Eureka can read the same corpus for gaps instead of for coverage: under-claimed branches adjacent to hydrocarbon dew point control, with the prior art for and against each one.
Who is filing, and where the gaps sit
The ranking covers all 37 companies the data endpoint returns for this search — not a top-50 or top-100 cut — with a steep drop from the leader to the rest of the field.
One assignee well ahead of the field
The leading assignee holds 43 of the 154 records in scope, more than four times the fifth-place count of 9. That gap is unusually wide for this kind of process-hardware field and points to a company that has built a filing programme around dew point control specifically rather than treating it as a side claim within broader gas-processing patents.
A compact second tier
Between fifth and tenth place, record counts fall from 9 to 4 — a tighter spread than the drop from first to fifth. This tier includes energy majors, engineering contractors and specialty chemical suppliers, suggesting dew point control claims are filed both by operators protecting process configurations and by suppliers protecting inhibitor and catalyst formulations.
Most assignees appear once or twice
Once the ranked ten are removed, the remaining 29 records-worth of activity across the rest of the 37-company ranking spread thinly. That long tail is typical of a field where operators, EPC contractors and chemical suppliers each file occasionally rather than running sustained portfolios.
| Assignee | Recent year | YoY |
|---|---|---|
| Twister BV | 0 | — |
| NGLTECH | 0 | — |
| Huntsman Petrochemical LLC | 0 | — |
| Equinor Energy AS | 0 | — |
| COSTAIN OIL GAS & PROCESS | 0 | — |
| The Lubrizol Corp | 0 | — |
| BASF Catalysts LLC | 0 | — |
| BETTING MARCO | 0 | — |
Where to take this analysis
The dataset points to concentration at the top and specific under-claimed branches; the next steps depend on whether the goal is freedom-to-operate or new filing strategy.
Map freedom-to-operate against the leader's portfolio
With one assignee holding 43 of 154 records, any new mechanical-separation or valve-based filing should be checked against that portfolio specifically before drafting claims.
Explore assignee portfolios in EurekaPressure-test claim language in the under-claimed branches
Adsorbent regeneration cycles and dosing control logic show comparatively thin coverage relative to the mechanical separation classes — worth a claims-drafting session before committing to a filing strategy.
Run a white space search in EurekaFrequently asked questions
One assignee leads the field with 43 of the 154 records in scope, well ahead of the fifth-place company at 9 records. The ranking covers 37 companies in total, and the top five combined hold 60.4% of all records, so filing activity is concentrated rather than evenly spread. Anyone assessing freedom-to-operate should look closely at the leader's claim scope before drafting in the mechanical separation or valve space.
The dataset spans low-temperature separators, Joule-Thomson valves, mechanical refrigeration chillers, hydrate inhibitors, condensate stabilisation and adsorbent-based dehydration. By IPC subclass, gas liquefaction and separation (F25J) and general separation processes (B01D) each cover roughly a quarter of the 154 records, with valves (F16K), hydrocarbon refining (C10G) and fuel compositions (C10L) also well represented. Materials-specific claims under C09K are comparatively less common, at 13.6% of records.
The filing trend peaked in 2019 at 15 records and has not returned to that level in the years since. A reliable growth rate cannot be stated from the years available, because fewer than four complete years remain once the roughly 18-month publication lag is accounted for. The most recent one to two years in any chart should be read as undercounted rather than as evidence of a slowdown.
The IPC composition shows mechanical separation and valve hardware claimed far more densely than materials-side claims: C09K materials formulations sit at 13.6% of records versus 26.0% for F25J gas separation. Sub-areas such as supersonic separator nozzle geometry, silica gel adsorbent regeneration cycling, and hydrate inhibitor dosing control logic show up less often in the co-assignee and class data, making them worth checking before assuming the ground is occupied. Under-claimed does not mean unclaimed, so a search against the specific leader portfolios is still necessary.
This filing, assigned to Pioneer Energy, describes a two-mode refrigeration cycle that pre-builds a cooled refrigerant reservoir before processing feed gas, then draws on that inventory to chill gas continuously without a startup ramp-up delay. The specific mechanism worth checking against is the pre-conditioning step itself, not refrigeration-based NGL extraction generally, since mechanical refrigeration chillers are a settled part of the prior art baseline in this field. Companies designing chiller-based dew point systems should compare their startup sequencing against this claim rather than assuming refrigeration-based extraction alone is blocked.
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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.