Exhaust Gas After-Treatment Unit for an Internal Combustion Engine and Procedure for Using a Drive Mechanism with Such an Exhaust Gas After-Treatment Unit
US-2018347423-A1 · Dec 6, 2018 · US
NH3-storage component incorporated in the catalyst
NH3-storage component incorporated in the catalyst · Cooperative Patent Classification (CPC)
Separating, mixing, shaping, printing, and transporting materials.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | B01D2255/911 |
| Official title | NH3-storage component incorporated in the catalyst |
| Display label | NH3-storage component incorporated in the catalyst |
| Total patents | 156 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 13 |
| 2016 | 19 |
| 2017 | 21 |
| 2018 | 18 |
| 2019 | 22 |
| 2020 | 14 |
| 2021 | 11 |
| 2022 | 9 |
| 2023 | 10 |
| 2024 | 12 |
| 2025 | 5 |
| 2026 | 2 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Exhaust gas purification material
US-2018296979-A1 · Oct 18, 2018 · US
Methods for producing 8-membered oxygen ring zeolite and aei-type zeolite
US-2018250663-A1 · Sep 6, 2018 · US
Exhaust gas purification material
US-10029209-B2 · Jul 24, 2018 · US
Catalyst system for gasoline combustion engines, having three-way catalysts and SCR catalyst
US-10022672-B2 · Jul 17, 2018 · US
Exhaust gas purification apparatus for internal combustion engine
US-9884293-B2 · Feb 6, 2018 · US
Exhaust gas purification apparatus
US-2018001308-A1 · Jan 4, 2018 · US
Molecular sieve catalyst compositions, catalyst composites, systems, and methods
US-2017368541-A1 · Dec 28, 2017 · US
Control device and control method for reducing agent injection device, and reducing agent injection device
US-2017321582-A1 · Nov 9, 2017 · US
Single or dual layer ammonia slip catalyst
US-9789441-B2 · Oct 17, 2017 · US
Binary catalyst based selective catalytic reduction filter
US-9764287-B2 · Sep 19, 2017 · US
Molecular sieve catalyst compositions, catalyst composites, systems, and methods
US-9764313-B2 · Sep 19, 2017 · US
Aei type zeolite, method for producing same, and uses thereof
US-2017259250-A1 · Sep 14, 2017 · US
PGM catalyst for treating exhaust gas
US-9751080-B2 · Sep 5, 2017 · US
Radio Frequency System and Method for Monitoring Engine-Out Exhaust Constituents
US-2017211453-A1 · Jul 27, 2017 · US
Exhaust aftertreatment system for a compression-ignition engine
US-9708949-B2 · Jul 18, 2017 · US
Ammonia slip catalyst
US-2017189854-A1 · Jul 6, 2017 · US
SCR catalytic converter having improved NOx conversion
US-9694320-B2 · Jul 4, 2017 · US
Fault diagnosis apparatus for exhaust gas purification system
US-2017152784-A1 · Jun 1, 2017 · US
Exhaust gas purification apparatus for internal combustion engine
US-9662612-B2 · May 30, 2017 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC B01D2255/911?
- CPC B01D2255/911 is the Cooperative Patent Classification code for “NH3-storage component incorporated in the catalyst.”
- How many patents are filed under CPC B01D2255/911 (NH3-storage component incorporated in the catalyst)?
- Our database includes 156 publications tagged with this CPC code.
- Is patent activity under CPC B01D2255/911 growing?
- Publication counts under this code: 12 in 2024 vs 5 in 2025 (latest complete years).