Removal of heteroatom-containing compounds from fluids
US-2018353893-A1 · Dec 13, 2018 · US
Chromium
Chromium · 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 | B01D2255/20784 |
| Official title | Chromium |
| Display label | Chromium |
| Total patents | 120 |
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 | 14 |
| 2017 | 26 |
| 2018 | 7 |
| 2019 | 10 |
| 2020 | 14 |
| 2021 | 10 |
| 2022 | 7 |
| 2023 | 9 |
| 2024 | 4 |
| 2025 | 5 |
| 2026 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Exhaust purifier
US-10132223-B2 · Nov 20, 2018 · US
Diesel oxidation catalyst combining platinum group metal with base metal oxide
US-2018318805-A1 · Nov 8, 2018 · US
Use of catalysts, method and apparatus for selective oxidation of ammonia in a gas containing hydrogen
US-10005067-B2 · Jun 26, 2018 · US
Dual-layer catalyst
US-10005031-B2 · Jun 26, 2018 · US
Control apparatus for internal combustion engine
US-2018171910-A1 · Jun 21, 2018 · US
Oxidation catalyst for a stoichiometric natural gas engine
US-2018015446-A1 · Jan 18, 2018 · US
Catalyst for purification of CO2 from chlorinated hydrocarbons
US-9850136-B2 · Dec 26, 2017 · US
Gas purification apparatus and gas purification method
US-9845438-B2 · Dec 19, 2017 · US
Application of synergized-pgm with ultra-low pgm loadings as close-coupled three-way catalysts for internal combustion engines
US-2017328250-A1 · Nov 16, 2017 · US
Catalyst for synergistic control of oxynitride and mercury and method for preparing the same
US-9802180-B2 · Oct 31, 2017 · US
Binary catalyst based selective catalytic reduction filter
US-9764287-B2 · Sep 19, 2017 · US
Ammonia slip catalyst having platinum impregnated on high porosity substrates
US-9757718-B2 · Sep 12, 2017 · US
Process for removing nitrous oxide from a gas stream
US-2017246590-A1 · Aug 31, 2017 · US
Process for removing nitrous oxide from a gas stream
US-2017246589-A1 · Aug 31, 2017 · US
A process for the oxidation of hydrogen sulfide to sulfur trioxide with subsequent sulfur removal and a plant for carrying out the process
US-2017239618-A1 · Aug 24, 2017 · US
Surface-modified catalyst precursors for diesel engine aftertreatment applications
US-9737877-B2 · Aug 22, 2017 · US
Processes using molecular sieve ssz-102
US-2017233260-A1 · Aug 17, 2017 · US
Method of capturing or trapping zinc using zinc getter materials
US-9700829-B1 · Jul 11, 2017 · US
Catalytic removal of gas phase contaminants
US-9700747-B2 · Jul 11, 2017 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC B01D2255/20784?
- CPC B01D2255/20784 is the Cooperative Patent Classification code for “Chromium.”
- How many patents are filed under CPC B01D2255/20784 (Chromium)?
- Our database includes 120 publications tagged with this CPC code.
- Is patent activity under CPC B01D2255/20784 growing?
- Publication counts under this code: 4 in 2024 vs 5 in 2025 (latest complete years).