Heterogeneous Catalysts for Emission Control Patent Landscape
The heterogeneous catalysts for emission control patent space is dominated by a small set of industrial and automotive incumbents, with 3M Innovative Properties, Toyota, and Cataler holding the leading positions. The field has passed its 2017 filing peak and is in a declining phase, with annual volumes well below their earlier high.
A concentrated incumbent field led by 3M, Toyota, and Cataler
3M Innovative Properties Co leads the applicant ranking, followed closely by Toyota Jidosha KK and Cataler Corp, with Hoechst AG and Johnson Matthey PLC rounding out the top five. The top five filers account for 29% of the combined output of the hundred largest filers, signaling meaningful but not overwhelming concentration at the very top.
The tier gap between the top five and the next tier is modest, suggesting that challengers such as Tianjin University and Degussa AG are within reach of the leaders on a volume basis. The field is not a duopoly; multiple industrial and academic actors sustain a diversified competitive landscape.
| # | Applicant | Patent records | Share |
|---|---|---|---|
| 1 | 3M Innovative Properties Co | 35 | |
| 2 | Toyota Motor Corporation | 27 | |
| 3 | Cataler Corporation | 26 | |
| 4 | Hoechst AG | 24 | |
| 5 | Johnson Matthey PLC | 18 | |
| 6 | Tianjin University | 16 | |
| 7 | Degussa AG | 12 | |
| 8 | Denso Corporation | 11 | |
| 9 | Mannesmann AG | 10 | |
| 10 | Solvay SA | 9 |
| # | Applicant | Patent records | Share |
|---|---|---|---|
| 11 | Rhone-Poulenc Chimie SA | 9 | |
| 12 | Litex Inc | 9 | |
| 13 | Genesis Research Institute | 8 | |
| 14 | Panasonic Holdings Corporation | 8 | |
| 15 | BASF Mobile Emissions Catalysts LLC | 8 | |
| 16 | UMICORE AG & CO KG | 7 | |
| 17 | Ibiden Co Ltd | 6 | |
| 18 | Centre National de la Recherche Scientifique (CNRS) | 6 | |
| 19 | Fraunhofer-Gesellschaft | 6 | |
| 20 | Murata Manufacturing Co Ltd | 6 |
The leadership positions of 3M and Toyota, both with broad coverage across separation and catalysis classes, indicate that generalist platform strategies have prevailed over narrow specialist approaches. Cataler’s exhaust-treatment focus (F01N) differentiates it as the most application-specific leader.
Filing counts for the most recent 18–24 months are subject to publication lag and should be treated as understated; the apparent low volumes in 2024–2025 do not necessarily reflect actual inventive activity in that window.
Activity peaked in 2017; B01D and B01J dominate the technology mix
Two lenses reveal the field’s current state: a filing trend that shows a sharp peak in 2017 followed by persistent lower volumes, and a technology composition dominated by separation and catalysis process classes with a long tail of adjacent branches.
Annual filing trend
Filings reached a clear peak of 36 records in 2017 before falling steeply. The window from 2018 onward shows volumes in the single-to-low-double digits annually; the most recent years (2024–2025) reflect publication lag and should not be read as the true current rate of activity.
↗ Hover for values · click a bar to ask EurekaTechnology composition
B01D (separation/filtration) and B01J (chemical and catalytic processes) jointly account for the vast majority of IPC records, establishing them as the core technical substrate. F01N (exhaust treatment) is the primary application-layer class. Lower-density branches—C01B, H01M, F02B, C10L, and C01G—appear at the periphery and represent areas where catalysis-specific filing is comparatively sparse.
↗ Hover for values · click a bar to ask EurekaHighly cited patent families surfaced by the query
Citation-heavy patent families returned by the query. Use this section as citation context, not as a curated list of the most topic-specific patents.
Supported catalyst, monolithic selective catalytic…
The present invention relates to a catalyst for NOx removal. More specifically, the present invention relates to a supported catalyst, a monolithic selective catalytic reduction (SCR) catalyst, preparation method therefor, and method for NOx removal. (excerpt from the patent abstract)
| # | Patent | Citations |
|---|---|---|
| 1 | Supported catalyst and process for catalytic oxida… | 160 |
| 2 | Catalysts, activating agents, support media, and r… | 157 |
| 3 | Catalysts, activating agents, support media, and r… | 151 |
| 4 | Preparation of alumina-supported catalyst composit… | 99 |
| 5 | Noble metal-containing supported catalyst and a pr… | 96 |
| 6 | Method and apparatus for enhancing the rate and ef… | 95 |
| 7 | Support coatings for catalysts | 95 |
| 8 | Method for preparing catalysts for heterogeneous c… | 90 |
Ranked by total forward citations. Citation counts favour older and broadly cited patent families, and broad or adjacent patents may appear when they match the search scope. Treat this section as citation context, not as a curated list of the most topic-specific patents. Some patent titles may be shown in their original, non-English language where an accurate translation could not be guaranteed.
What the patent structure means for R&D investment decisions
United States–led jurisdiction profile shapes both the risks and entry options for new participants.
Field is in decline from its 2017 peak
The lifecycle stage is classified as Decline, with annual filings easing back from the 2017 peak. This indicates that the dominant technical approaches are largely codified and that incremental improvements face a crowded prior-art landscape. New entrants should prioritize differentiated catalyst compositions or application niches not yet claimed by the incumbents.
Lifecycle: DeclineTop five hold 29% of the hundred largest filers’ combined output
The top five filers—3M Innovative Properties, Toyota Jidosha, Cataler, Hoechst, and Johnson Matthey—account for 29% of the top-hundred filers’ combined patent records. The gap to the next tier (Tianjin University at rank six, Degussa AG at rank seven) is not insurmountable, leaving room for academically backed or specialty-chemical challengers to advance. Entrants should benchmark against the mid-tier before targeting the leaders.
Moderate concentrationToyota–Cataler cluster dominates co-filing activity
The most active co-applicant pair is Cataler Corp with Toyota Central Research Institute (3 joint filings), followed by Cataler with Cataler Industries and Cataler with Toyota Jidosha (2 each). Toyota Jidosha also co-files with the National Institute for Materials Science and with Denso Corp. This cluster reflects a vertically integrated Japanese automotive R&D ecosystem that may be difficult to penetrate without established supply-chain relationships.
Japan automotive clusterUnited States leads; China and EPO are strong secondary markets
The United States is the leading filing jurisdiction, followed by China, Europe (EPO), and Japan. WIPO PCT filings and United Kingdom coverage round out the primary protection geographies. South Korea, Australia, and Germany represent secondary markets. Sparse coverage in India and Brazil may indicate either limited commercial priority or an opportunity to establish early positions in growing regulatory markets.
US-led, global reachGo beyond the landscape: Eureka’s TRIZ Solution agent breaks down an R&D problem and returns patented concept solutions, each with a technical approach and cited patent & literature evidence.
| Applicant | Collaborator | Co-filings |
|---|---|---|
| Cataler Corporation | Toyota Central R&D Labs Inc | 3 |
| Cataler Corporation | Cataler Industries Co Ltd | 2 |
| Cataler Corporation | Toyota Motor Corporation | 2 |
| Toyota Motor Corporation | National Institute for Materials Science (NIMS) | 2 |
| Toyota Motor Corporation | Toyota Motor Corporation | 2 |
| Toyota Motor Corporation | Denso Corporation | 1 |
Co-filing pairs, ranked by the number of jointly-filed patent families.
3M and Toyota lead on breadth; Cataler differentiates on exhaust-system focus
The top two applicants pursue broad, platform-level coverage across separation and catalysis classes, while Cataler’s portfolio skews toward exhaust treatment (F01N), reflecting its position as a dedicated automotive catalyst supplier. Applicant-level momentum data are not available in the current evidence set.
3M Innovative Properties Co
3M leads the ranking with 35 patent records, covering B01D 53 (separation), B01J 23 (transition-metal catalysis), and C01B 32 (non-metallic inorganic compounds) as its top three sub-classes. This breadth indicates a materials-platform strategy spanning catalyst support media, active components, and filtration structures. Applicant momentum data are not available for trajectory assessment.
35 patent recordsCataler Corp
Cataler Corp holds 26 patent records and is distinguished by its leading emphasis on F01N 3 (exhaust silencers and treatment), alongside B01D 53 and B01J 23. As the most application-specific of the top three, Cataler’s portfolio is closely tied to automotive after-treatment systems. Its co-filing relationships with Toyota Jidosha and Toyota Central Research Institute reinforce its position within the Japanese automotive supply chain.
26 patent recordsUnder-served branches at the intersection of catalysis and energy or fuel chemistry
Several IPC branches adjacent to the dominant B01D/B01J core show relatively sparse filing counts, suggesting areas where heterogeneous catalyst expertise has been less systematically applied within this corpus.
H01M · Batteries, cells & fuel cells
H01M carries only 22 patent records in this corpus—a 2% share of IPC records—despite clear technical overlap between emission-control catalysis and fuel-cell electrode catalyst design. Heterogeneous catalyst know-how in precious-metal dispersion and support stability is directly transferable to proton-exchange-membrane and solid-oxide fuel cells. The entry path is plausible for incumbents already holding B01J 23 positions, particularly those with platinum-group-metal expertise.
Search this in Eureka →C10L · Fuels & firelighters
C10L accounts for only 13 patent records (1% of IPC records), suggesting that catalytic fuel reformulation and additive chemistry—areas where heterogeneous catalysts can reduce combustion emissions upstream of the after-treatment system—remains relatively unexplored in this corpus. This branch has plausible value for applicants targeting low-carbon fuel pathways or synthetic fuel production, and could complement existing F01N after-treatment portfolios.
Search this in Eureka →How leading applicants differ by technology sub-class emphasis
Route coverage across the main technology branches in the current evidence set.
| Player | B01D 53 · Separation processes (filtration etc.) | B01J 23 · Chemical/physical processes & catalysis | B01J 37 · Chemical/physical processes & catalysis | B01J 35 · Chemical/physical processes & catalysis | F01N 3 · Exhaust silencers & treatment |
|---|---|---|---|---|---|
| 3M Innovative Properties Co | Strong · 34 | Strong · 33 | Strong · 27 | Strong · 30 | Absent |
| Toyota Motor Corporation | Strong · 26 | Strong · 24 | Strong · 22 | Strong · 18 | Moderate · 13 |
| Cataler Corporation | Strong · 24 | Strong · 24 | Absent | Absent | Strong · 25 |
| Hoechst AG | Strong · 21 | Strong · 21 | Strong · 12 | Absent | Absent |
| Johnson Matthey PLC | Strong · 18 | Absent | Moderate · 7 | Moderate · 5 | Strong · 10 |
| Denso Corporation | Strong · 10 | Strong · 9 | Absent | Strong · 9 | Strong · 9 |
| Mannesmann AG | Strong · 10 | Absent | Strong · 8 | Strong · 10 | Strong · 7 |
Frequently asked questions
3M Innovative Properties Co leads the ranking with 35 patent records, ahead of Toyota Jidosha KK (27) and Cataler Corp (26) within the top-100 applicant list for this corpus.
The corpus covers 130 patent families in scope, representing a focused but well-established body of intellectual property in heterogeneous emission-control catalysis.
B01D (separation processes including filtration) and B01J (chemical and physical processes and catalysis) are the two dominant IPC classes by record count, followed by F01N (exhaust silencers and treatment) as the primary application-layer class.
The United States leads with 107 patent records, followed by China (87), Europe via the EPO (75), and Japan (72). WIPO PCT and the United Kingdom are also significant secondary filing routes.
The field is classified as Decline, with annual filing volumes easing back from a peak in 2017. The most recent years (2024–2025) are subject to publication lag and likely understate current inventive activity.
Cataler Corp is the most active co-filer, with joint filings alongside Toyota Central Research Institute (3 filings), Cataler Industries (2), and Toyota Jidosha (2). Toyota Jidosha also co-files with the National Institute for Materials Science and Denso Corp, reflecting a tightly integrated Japanese automotive R&D cluster.
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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.
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