Automotive Exhaust Catalysis Patents: Leaders & Filing Trends 2026
- Filing peaked in 2017 at 17 families and the dataset's midpoint year, 2022, shows zero — a flat-to-declining trend rather than a growing one.
- Every major assignee shows zero filings in the latest year including Ford Global Technologies, Corning, Umicore and Johnson Matthey, though publication lag means recent activity is understated.
- F01N, B01J and B01D dominate the IPC mix while F02D engine control, C04B ceramics and F02M fuel supply appear far less often — a signal of where claims are thinner.
Filing growth compares 2021 (1 records) with 2024 (0) — 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 192 records in scope (CR5), not by the ranked leaders only.
What the dataset covers
This landscape draws on 192 patent families published between 2015 and mid-2026, filtered to records combining automotive three-way and selective catalytic reduction claims with technical control terms such as light-off temperature, PGM loading, washcoat, sulfur poisoning and aging durability. The IPC filter centres on B01J23 (catalyst composition), B01D53 (gas separation and treatment) and F01N3 (exhaust treatment systems), which keeps the corpus focused on catalyst formulation and system integration rather than engine design broadly.
Filing offices skew toward the United States, Europe and India, with a smaller but notable share of PCT and UK filings. Because publication typically lags filing by around 18 months, the apparent decline toward 2026 should be read as an incomplete picture of the most recent activity rather than a confirmed drop-off.
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Filing trend and technology composition
Two views of the same 192-family dataset: how filing volume has moved year over year, and how those filings distribute across IPC subclasses.
A peak in 2017, then a flat-to-declining trend
Filings reached 17 in 2017, the peak observed in this dataset, and the midpoint year 2022 sits at zero. That pattern points to a technology area where core claim positions were staked out mid-decade rather than one still building momentum, though the final two to three years are understated due to publication lag.
Concentration in exhaust treatment and catalysis subclasses
F01N (151 records) and B01J (132) together anchor the corpus, with B01D (114) close behind — confirming this is fundamentally a catalyst-and-aftertreatment-system dataset. F02D engine control (20), C04B ceramics (12), F02B combustion (9), F02M fuel supply (7) and F02P ignition (3) appear at much lower density, marking those as adjacent rather than core claim territory.
Shares are the percentage of the 192 records in scope. A patent can carry several IPC classes, so the shares add up to more than 100%.
Go deeper on Automotive Exhaust Catalysis with Eureka
This page is one run against one query. Ask Eureka your own question about automotive exhaust catalysis and every answer comes back with the patent numbers behind it.
Try EurekaThe records other filings build on
US6187709B1 — Palladium catalyst pre-oxidation to reduce light-off temperature
The invention is a method for preconditioning a palladium containing automotive catalyst by subjecting the catalyst to oxidation by means of an oxidizing gas containing at least 0.85% oxygen at a temperature of at least 450°C, preferably for at least 15 seconds. This oxidation can be carried out before or after engine shutdown. The catalyst is placed in the exhaust system in a location whereby it attains this temperature during steady-state warm-up operation of the engine.Filed by Ford Global Technologies, granted 2001-02-13.
| # | Publication no. | Patent title | Citations |
|---|---|---|---|
| 1 | US5772972A | Catalyst/hydrocarbon trap hybrid system | 110 |
| 2 | US5244852A | Molecular sieve-palladium-platinum catalyst on a substrate | 109 |
| 3 | US5182249A | Non-precious metal three way catalyst | 77 |
| 4 | US5292991A | Process for removal of hydrocarbons carbon manoxide, and oxides of nitrogen from oxygen-containing waste gas … | 59 |
| 5 | US20140205523A1 | Automotive Catalyst Composites Having A Two-Metal Layer | 57 |
| 6 | US20110113754A1 | Exhaust gas purification catalyst, exhaust gas purification apparatus using the same and exhaust gas purifica… | 57 |
| 7 | US20140065042A1 | Three way catalyst comprising extruded solid body | 50 |
| 8 | US5922294A | High surface area, thermally stabilized titania automotive catalyst support | 49 |
| 9 | US5556825A | Automotive catalysts with improved oxygen storage and metal dispersion | 49 |
| 10 | US9040003B2 | Three way catalyst comprising extruded solid body | 45 |
Citation counts reflect influence within this searched corpus and favour older records; they are not a measure of current commercial relevance.
Each row carries its publication number; clicking a row searches Eureka by that number.
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Browse MCP servers →What the filing pattern signals
Three observations that follow directly from the trend, IPC mix and citation data above.
Core claims were staked mid-decade
The 2017 peak followed by a zero midpoint at 2022 suggests the foundational three-way and SCR catalyst claims in this dataset were largely filed and settled by the late 2010s, rather than being an actively expanding frontier.
Influence concentrates in older filings
The most-cited records, including US5772972A and US5244852A, date from the early-to-mid 1990s. Their citation counts reflect long exposure time in the corpus rather than an active surge in reliance on those specific claims today.
Aftertreatment dominates over fuel-supply integration
F01N exhaust treatment appears in 151 of 192 records while F02M fuel supply appears in only 7, indicating the claim density is heavily weighted toward the catalyst and silencer system rather than upstream fuel metering interactions.
Eureka can read the same corpus for gaps instead of for coverage: under-claimed branches adjacent to automotive exhaust catalysis, with the prior art for and against each one.
Who holds the ground, and where momentum has stalled
The leading assignees in this corpus include established catalyst and automotive OEM names, but the recent-year momentum figures tell a consistent story across nearly all of them.
Zero latest-year activity across the top names
BASF, Johnson Matthey, Umicore, Ford Global Technologies and Corning all show zero filings in the latest year captured. This is consistent with the broader flat-to-declining trend, though publication lag means it likely understates true recent activity.
BASF entities co-file most frequently
The strongest co-assignee link in the dataset is between two BASF entities, filing together 10 times. Hyundai Motor and Hyundai Kefico, and Hyundai Motor and Kia, also appear as recurring pairs, reflecting typical parent-subsidiary and OEM-supplier filing patterns.
US, Europe and India lead office distribution
The United States accounts for the largest share of receiving-office filings, followed by the EPO and India. UK, WIPO/PCT and Canada each carry smaller but non-trivial shares, indicating a filing strategy still centred on the three largest automotive markets plus a growing India presence.
| Assignee | Recent year | YoY |
|---|---|---|
| BASF Corporation | 0 | — |
| Johnson Matthey PLC (UK) | 0 | — |
| Umicore AG & Co. KG | 0 | — |
| Ford Global Technologies, LLC | 0 | — |
| Corning Incorporated | 0 | — |
| BASF SE | 0 | — |
| GM Global Technology Operations LLC | 0 | — |
| Engelhard Corporation | 0 | — |
Where to take this
The dataset points to a mature, densely claimed core with narrower gaps at the edges. Two directions follow from that.
Map claims against the under-claimed branches
The gate chips above outline sub-areas — sulfur poisoning recovery, non-PGM substitution, engine-control coupling — where filing density is lower than the F01N/B01J/B01D core. A freedom-to-operate check focused there is more likely to surface open space than a search centred on core washcoat or PGM-loading claims.
Explore white space in EurekaVerify recent-year momentum with a shorter-lag source
Because every leading assignee shows zero filings in the latest year, and because publication lag runs around 18 months, the true 2024-2026 picture is not yet visible in this corpus. Cross-check against filing intent or priority-date sources before concluding any of these companies have exited the space.
Track live filing activity in EurekaCommon questions on automotive exhaust catalysis patents
The leading assignees in this corpus include BASF, Johnson Matthey, Umicore, Ford Global Technologies and Corning, alongside automotive OEMs such as Hyundai and Kia. These names reflect a mix of specialist catalyst manufacturers and vehicle makers with in-house aftertreatment programs. Notably, every one of these leading assignees shows zero recorded filings in the latest year of the dataset, though publication lag of roughly 18 months means the most recent activity is not yet fully visible.
Based on this dataset, no — filing peaked in 2017 at 17 families and the midpoint year of 2022 shows zero, indicating a flat-to-declining trend rather than continued growth. This does not necessarily mean R&D has stopped; it may reflect that core claim positions were established mid-decade and the field has since matured. Any conclusion about the very latest years should account for publication lag before filings fully appear in patent databases.
US6187709B1, assigned to Ford Global Technologies, claims a method of preconditioning a palladium-containing automotive catalyst through oxidation at 450°C or above for at least 15 seconds, using an oxidizing gas with at least 0.85% oxygen, timed to reduce light-off temperature. It blocks approaches that replicate this specific pre-oxidation conditioning sequence and temperature/oxygen/duration combination on palladium catalysts. Designs using different metal loadings, different conditioning gas compositions, or catalyst systems that do not rely on this pre-oxidation step would sit outside its claim scope, but a freedom-to-operate review should confirm this against the specific formulation involved.
IPC composition data shows F01N (exhaust treatment), B01J (catalysis) and B01D (separation) dominate the corpus, while F02D engine control, C04B ceramics, F02B combustion, F02M fuel supply and F02P ignition appear far less frequently. This suggests claim space around engine-control coupling with catalyst behavior, ceramic substrate composition, and fuel-supply interactions with catalytic performance is comparatively under-claimed relative to core washcoat and PGM-loading formulations. These branches are worth a closer freedom-to-operate look before assuming they are occupied.
Citation counts accumulate over time, so records from the early-to-mid 1990s such as US5772972A and US5244852A have simply had decades longer to be cited than more recent filings. This makes citation count a useful signal of foundational influence within the searched corpus, not a measure of current commercial relevance or validity. A newer filing with fewer citations may still represent the more commercially active or technically current approach.
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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.