Method for influencing a fluid flow
US-10161280-B2 · Dec 25, 2018 · US
Metallic honeycomb monoliths made of stacked or rolled sheets, foils or plates
Metallic honeycomb monoliths made of stacked or rolled sheets, foils or plates · Cooperative Patent Classification (CPC)
Engines, pumps, lighting, heating, and mechanical systems.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | F01N3/281 |
| Official title | {Metallic honeycomb monoliths made of stacked or rolled sheets, foils or plates} |
| Display label | Metallic honeycomb monoliths made of stacked or rolled sheets, foils or plates |
| Total patents | 242 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is rapidly declining.
| Year | Patents |
|---|---|
| 2015 | 14 |
| 2016 | 9 |
| 2017 | 11 |
| 2018 | 27 |
| 2019 | 39 |
| 2020 | 22 |
| 2021 | 34 |
| 2022 | 38 |
| 2023 | 22 |
| 2024 | 13 |
| 2025 | 12 |
| 2026 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Capacitor-powered catalyst heater
US-10161277-B2 · Dec 25, 2018 · US
Diesel oxidation catalyst and exhaust system
US-2018353902-A1 · Dec 13, 2018 · US
Diesel oxidation catalyst and exhaust system
US-2018353903-A1 · Dec 13, 2018 · US
Method of Preparation of a Monolithic Catalyst for Selective Catalytic Reduction of Nitrogen Oxides
US-2018318796-A1 · Nov 8, 2018 · US
Capacitor-powered catalyst heater
US-2018306080-A1 · Oct 25, 2018 · US
Electrically heated catalyst
US-10100691-B2 · Oct 16, 2018 · US
Catalyst apparatus for internal combustion engine
US-2018291788-A1 · Oct 11, 2018 · US
Catalyst apparatus for internal combustion engine
US-2018291785-A1 · Oct 11, 2018 · US
Exhaust gas purification catalyst
US-10076725-B2 · Sep 18, 2018 · US
Metal substrate for catalytic converters
US-10072549-B2 · Sep 11, 2018 · US
Method for the Removal of Nitrogen Oxides from Exhaust Gas by Selective Catalytic Reduction in Presence of an SCR Catalyst Comprising a Fe-AEI Zeolithic Material Essentially Free of Alkali Metal
US-2018250632-A1 · Sep 6, 2018 · US
Honeycomb core for carrying catalyst and catalytic converter
US-2018243734-A1 · Aug 30, 2018 · US
Exhaust purifying apparatus
US-2018163599-A1 · Jun 14, 2018 · US
Catalyst block and method for manufacturing same
US-2018161766-A1 · Jun 14, 2018 · US
Zeolite, method for producing zeolite, honeycomb catalyst using zeolite, and exhaust gas purifying apparatus
US-2018133650-A1 · May 17, 2018 · US
Layer packet contacting for electrically heatable honeycomb body
US-2018128144-A1 · May 10, 2018 · US
Zeolite, method for producing zeolite, honeycomb catalyst using zeolite, and exhaust gas purifying apparatus
US-2018111115-A1 · Apr 26, 2018 · US
Ferritic stainless steel foil
US-9920409-B2 · Mar 20, 2018 · US
Exhaust gas purification catalyst
US-2018071680-A1 · Mar 15, 2018 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F01N3/281?
- CPC F01N3/281 is the Cooperative Patent Classification code for “Metallic honeycomb monoliths made of stacked or rolled sheets, foils or plates.”
- How many patents are filed under CPC F01N3/281 (Metallic honeycomb monoliths made of stacked or rolled sheets, foils or plates)?
- Our database includes 242 publications tagged with this CPC code.
- Is patent activity under CPC F01N3/281 growing?
- Publication counts under this code: 13 in 2024 vs 12 in 2025 (latest complete years).