Zeolite SCR Emission Control Patent Landscape 2026
Johnson Matthey PLC commands a commanding lead in zeolite SCR emission control patents, holding the top position by a wide margin over challengers concentrated in catalyst chemistry and exhaust-treatment engineering. The field is still expanding on a multi-year basis, though annual volume has eased from its 2017 peak and the most recent years are further understated by publication lag.
Johnson Matthey leads a highly concentrated field with a wide tier gap
Johnson Matthey PLC sits at the top of the applicant ranking with 230 patent records, more than eight times the count of the second-ranked Hyundai Motor Co., Ltd. at 27. The top five filers account for 53% of the hundred largest filers’ combined total, signalling a strongly concentrated competitive structure.
A steep drop-off between the leader and the second tier is the defining structural feature: the gap between first and second place spans more than 200 patent records, while ranks two through five — Hyundai Motor, Engelhard Corp, Umicore AG & Co. KG, and Accentus PLC — are clustered between 17 and 27 records each.
| # | Applicant | Patent records | Share |
|---|---|---|---|
| 1 | Johnson Matthey PLC | 230 | |
| 2 | Hyundai Motor Co., Ltd. | 27 | |
| 3 | Engelhard Corp | 22 | |
| 4 | UMICORE AG & CO KG | 18 | |
| 5 | Accentus PLC | 17 | |
| 6 | Johnson Matthey Catalysts (Germany) GmbH | 16 | |
| 7 | Corning Inc. | 16 | |
| 8 | EXXONMOBIL TECHNOLOGY & ENGINEERING CO | 11 | |
| 9 | Delft University of Technology | 11 | |
| 10 | BASF Catalysts LLC | 10 |
| # | Applicant | Patent records | Share |
|---|---|---|---|
| 11 | Mobil Oil Corporation | 9 | |
| 12 | Hino Motors, Ltd. | 9 | |
| 13 | Isuzu Motors, Ltd. | 9 | |
| 14 | GM Global Technology Operations LLC | 8 | |
| 15 | IFP Energies Nouvelles | 7 | |
| 16 | Tosoh Corporation | 7 | |
| 17 | Haldor Topsoe A/S | 7 | |
| 18 | Chen Hai Ying | 6 | |
| 19 | Mitsubishi Chemical Corporation | 6 | |
| 20 | Ford Global Technologies LLC | 6 |
Johnson Matthey’s position, reinforced by its German subsidiary Johnson Matthey Catalysts (Germany) GmbH at rank six, implies that any new entrant or challenger must either target a technology sub-route where the leader is less active, or build collaborative ties with one of the mid-tier players to achieve a credible filing posture.
The most recent 18–24 months of filing data are subject to publication lag and should be treated as a lower bound on actual activity; the structural rankings reported here reflect the longer historical window. Longer-window growth, applicant concentration, and technology-route coverage are therefore more reliable signals than the latest-year bar alone.
Multi-year growth persists, with catalyst chemistry dominating the technology mix
The annual filing trend and the IPC class breakdown together reveal a field that peaked sharply in 2017 and has since settled at a lower but sustained rate, while the technology mix is dominated by separation/filtration and catalysis processes.
Annual filing trend
Filings spiked at 36 records in 2017 before falling sharply through 2020; activity partially recovered in 2022 (14 records) and has since moderated. The three-year recent window sits 35% above the prior three-year window on a multi-year basis, confirming the Growth lifecycle stage. Data for 2024–2026 understate true activity due to publication lag and should not be read as a decline.
↗ Hover for values · click a bar to ask EurekaTechnology composition
B01D (Separation processes, including filtration) and B01J (Chemical/physical processes and catalysis) together account for the large majority of IPC classifications, reflecting the core catalyst-chemistry focus of the corpus. F01N (Exhaust silencers and treatment) is the third branch, confirming an aftertreatment engineering dimension. Lower-share branches such as C01B, F02B, and C04B represent under-served adjacent areas worth monitoring.
↗ 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.
Selective catalytic reduction filter for reducing …
A selective catalytic reduction filter (SCRF) including a wall-flow substrate having inlet channels and outlet channels is provided. A first selective catalytic reduction (SCR) catalyst zone is present in the inlet channels, and a second SCR catalyst zone is present in the outlet channels. The first SCR catalyst zone includes an iron-exchanged zeolite… (excerpt from the patent abstract)
| # | Patent | Citations |
|---|---|---|
| 1 | Method for reduction of nitrogen oxides with ammon… | 768 |
| 2 | Transition metal/zeolite SCR catalysts | 628 |
| 3 | Staged metal-promoted zeolite catalysts and method… | 473 |
| 4 | NOx decreasing apparatus for an internal combustio… | 259 |
| 5 | Cold start catalyst and its use in exhaust systems | 206 |
| 6 | Selective catalytic reduction of nitrogen oxides u… | 168 |
| 7 | Staged metal-promoted zeolite catalysts and method… | 154 |
| 8 | Nitrogen oxides decreasing apparatus for an intern… | 122 |
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 competitive structure means for R&D investment decisions
The combination of high concentration, a clearly dominant incumbent, and a Growth lifecycle stage shapes the strategic calculus for both established players and new entrants. The four cards below unpack the most actionable dimensions.
Growth stage — expanding on a multi-year basis, eased from 2017 peak
The lifecycle evidence classifies this field as Growth: the recent three-year filing window is 35% above the prior three-year window. Annual volume, however, has eased from the 2017 peak of 36 records and has not returned to that level, indicating the field is maturing into a more stable growth trajectory rather than accelerating. R&D teams should expect continued but less explosive IP activity from established players.
Lifecycle: GrowthExtreme leader concentration with a shallow second tier
The top five filers hold 53% of the hundred largest filers’ combined total, and Johnson Matthey alone accounts for 230 patent records against a second-place count of 27. This degree of concentration means that freedom-to-operate analysis is critical before investing in mainstream catalyst formulation routes. Challengers are more credibly positioned in exhaust-system integration (F01N) or engine-side control (F02B/F02D) where the leader’s share is proportionally lower.
High concentrationHyundai–Kia–POSTECH triangle is the most active co-filing cluster
The strongest co-filing relationship in the corpus is between Hyundai Motor Co., Ltd. and Kia Corporation, with 20 joint records. Both automakers also each co-file with POSTECH Academy-Industry Foundation (6 records each), forming a triangulated OEM–university cluster. Separately, Chen Hai Ying co-files with Johnson Matthey PLC on 6 records, suggesting an individual-inventor channel into the market leader. BASF SE entities show limited internal co-filing activity.
OEM–university clusterUS and EPO lead; Asia-Pacific is a significant secondary arena
The United States (115 patent records) and EPO (109 records) are the primary filing jurisdictions, consistent with the Western-OEM and regulatory-driven character of the corpus. Japan (61 records), China (52 records), and South Korea (19 records) together constitute a substantial Asia-Pacific footprint. PCT filings (42 records) indicate applicants are actively seeking broad international coverage, which raises barrier-to-entry costs for regional players.
US/EPO-led; Asia growingGo 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 |
|---|---|---|
| Hyundai Motor Co., Ltd. | Kia Corporation | 20 |
| Hyundai Motor Co., Ltd. | 浦项工科大学校产学协力团 | 6 |
| Kia Corporation | 浦项工科大学校产学协力团 | 6 |
| Chen Hai Ying | Johnson Matthey PLC | 6 |
| Hyundai Motor Co., Ltd. | Heesung Catalysts Corp. | 5 |
| Kia Corporation | Heesung Catalysts Corp. | 5 |
| BASF SE | BASF Corporation | 1 |
| BASF SE | BASF (China) Co., Ltd. | 1 |
Co-filing pairs, ranked by the number of jointly-filed patent families.
Johnson Matthey anchors the field; Umicore and BASF show new-entrant momentum
Two tiers define the competitive landscape: Johnson Matthey PLC as the clear incumbent with deep coverage across separation and catalysis routes, and a cluster of automotive OEMs and specialty chemical firms competing at much lower volume. Recent momentum data flag three players with new-entrant trajectories in the current window.
Johnson Matthey PLC
Johnson Matthey PLC holds 230 patent records, the largest position by a wide margin. Its technology emphasis is concentrated in B01D 53 (separation/gas-treatment processes, 206 records) and B01J 29 (zeolite-based catalysis, 138 records), with a secondary position in B01J 35. Momentum data classify the company as a new entrant in the most recent filing window with 6 recent records, suggesting a continued but measured pace of new filings from an already very large base.
patent records: 230Umicore AG & Co. KG
Umicore AG & Co. KG ranks fourth overall with 18 patent records. Its technology focus spans B01J 29 (zeolite catalysis, 12 records) and B01D 53 (separation, 11 records), with a notable additional position in C01B 39 (zeolite synthesis/inorganic compounds, 6 records) — a branch where the leader is proportionally less active. Momentum data classify Umicore as a new entrant in the recent window with 2 recent records, indicating a selective but active filing posture that could build toward a stronger position in zeolite synthesis IP.
patent records: 18| Applicant | Recent (3 yrs) | Trend |
|---|---|---|
| Johnson Matthey PLC | 6 | ▲ new entrant |
| BASF SE | 3 | ▲ new entrant |
| Umicore AG & Co. KG | 2 | ▲ new entrant |
Under-served branches adjacent to the core SCR catalyst space
The IPC composition reveals several branches that are sparsely covered relative to the dominant B01D/B01J core. These are observations of relative filing density; entry viability depends on technical fit and freedom-to-operate.
C04B · Ceramics, cement and refractories
C04B carries only 10 patent records in this corpus, representing approximately 1% of all IPC classifications recorded — sparse relative to the dominant catalyst and separation branches. Zeolite SCR catalysts are coated onto ceramic substrates (cordierite or silicon carbide monoliths), so advances in substrate porosity, thermal shock resistance, or washcoat adhesion fall here. An entrant with ceramics expertise and a freedom-to-operate position in substrate engineering could address a genuine technical gap without competing head-on with Johnson Matthey’s catalyst chemistry stronghold.
Search this in Eureka →F02B / F02D · Internal-combustion engines and engine control
F02B (internal-combustion engines) and F02D (engine control) together account for 24 patent records in this corpus — a small share that reflects the dominant aftertreatment framing of most SCR filings. As SCR systems integrate more tightly with engine-management software for predictive dosing and cold-start optimization, the boundary between aftertreatment and engine control grows technically important. This branch is under-served in the current corpus and may offer entry points for OEMs or Tier-1 suppliers whose core competency lies in powertrain controls rather than catalyst chemistry.
Search this in Eureka →How the leading filers differ in their technology route emphasis
Route coverage across the main technology branches in the current evidence set.
| Player | B01D 53 · Separation processes (filtration etc.) | B01J 29 · Chemical/physical processes & catalysis | F01N 3 · Exhaust silencers & treatment | B01J 35 · Chemical/physical processes & catalysis | B01J 23 · Chemical/physical processes & catalysis |
|---|---|---|---|---|---|
| Johnson Matthey PLC | Strong · 206 | Strong · 138 | Moderate · 47 | Moderate · 77 | Moderate · 76 |
| Accentus PLC | Strong · 17 | Strong · 15 | Strong · 15 | Absent | Strong · 15 |
| Hyundai Motor Co., Ltd. | Strong · 21 | Strong · 24 | Strong · 14 | Absent | Absent |
| Corning Inc. | Strong · 14 | Strong · 12 | Strong · 10 | Strong · 10 | Strong · 9 |
| BASF SE | Strong · 19 | Strong · 21 | Strong · 12 | Absent | Absent |
| Engelhard Corp | Strong · 23 | Strong · 23 | Absent | Absent | Absent |
| Kia Corporation | Strong · 16 | Strong · 17 | Strong · 11 | Absent | Absent |
Frequently asked questions
Johnson Matthey PLC holds the largest position with 230 patent records, followed by Hyundai Motor Co., Ltd. at 27 and Engelhard Corp at 22. Johnson Matthey’s German subsidiary adds a further 16 records, reinforcing the group’s dominant standing.
The field is classified as Growth. The most recent three-year filing window sits 35% above the prior three-year window on a multi-year basis. Annual volume peaked at 36 records in 2017 and has since eased; the most recent years are further understated by publication lag and should not be read as a real decline.
The United States and EPO (Europe) are the primary filing venues, with 115 and 109 patent records respectively. Japan (61), China (52), WIPO PCT (42), and South Korea (19) are significant secondary jurisdictions. The breadth of PCT filings signals that leading applicants are pursuing wide international coverage.
B01D (separation/filtration processes) and B01J (chemical/physical processes and catalysis) together account for the overwhelming majority of IPC classifications, with 493 and 420 records respectively. F01N (exhaust treatment) is third at 181. Sparse branches include C04B (ceramics and refractories, 10 records), F02B (internal-combustion engines, 22 records), and F02D (engine control, 2 records), representing under-served adjacent areas.
The most-cited document is titled ‘Method for reduction of nitrogen oxides with ammonia’ with 768 citations, followed by ‘Transition metal/zeolite SCR catalysts’ at 628 citations and ‘Staged metal-promoted zeolite catalysts and methods’ at 473 citations. These foundational documents anchor the transition-metal-exchanged zeolite catalyst design space.
Momentum data flag Johnson Matthey PLC (6 recent records), BASF SE (3 recent records), and Umicore AG & Co. KG (2 recent records) as new entrants in the most recent filing window — meaning each had little or no activity in the prior comparable window. Given the publication lag on recent filings, these figures should be treated as lower bounds on current activity.
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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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