Composite catalyst and method for manufacturing carbon nanostructured materials
US-9845243-B2 · Dec 19, 2017 · US
Iron group metals
Iron group metals · 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 | B01J23/74 |
| Official title | Iron group metals |
| Display label | Iron group metals |
| Total patents | 302 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 32 |
| 2016 | 27 |
| 2017 | 28 |
| 2018 | 42 |
| 2019 | 39 |
| 2020 | 34 |
| 2021 | 22 |
| 2022 | 24 |
| 2023 | 17 |
| 2024 | 19 |
| 2025 | 14 |
| 2026 | 4 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Sodium transition metal silicate and method of forming same
US-2016365578-A1 · Dec 15, 2016 · US
High-purity gas production apparatus and production method therefor
US-9505616-B2 · Nov 29, 2016 · US
Removing unstable sulfur compounds from crude oil
US-9499749-B2 · Nov 22, 2016 · US
Carbon nanostructure, and method and apparatus for manufacturing carbon nanostructure
US-9493354-B2 · Nov 15, 2016 · US
Methods and systems for producing alcohols and amides from carbon dioxide
US-9481622-B2 · Nov 1, 2016 · US
Carbide-derived carbons having incorporated metal chloride or metallic nanoparticles
US-2016310929-A1 · Oct 27, 2016 · US
Titanium-oxide catalyst and method of producing the same
US-2016271588-A1 · Sep 22, 2016 · US
Enclosed-channel reactor method to manufacture catalysts or support materials
US-2016256863-A1 · Sep 8, 2016 · US
Method For Preparing A Halosilane
US-2016244468-A1 · Aug 25, 2016 · US
High-purity gas production apparatus and production method therefor
US-9416007-B2 · Aug 16, 2016 · US
Mild acidic catalyst for hydroprocessing of heavy crude oil and residue and its synthesis procedure
US-9387466-B2 · Jul 12, 2016 · US
Enclosed-channel reactor system and method to manufacture catalysts or support
US-9381509-B2 · Jul 5, 2016 · US
Catalyst and method of manufacture
US-9375710-B2 · Jun 28, 2016 · US
Method of preparing an alumina catalyst support and catalyst for dehydrogenation reactions, and its use
US-9364815-B2 · Jun 14, 2016 · US
Mixed metal iron oxides and uses thereof
US-2016158734-A1 · Jun 9, 2016 · US
Producing two-dimensional sandwich nanomaterials based on graphene
US-9359675-B2 · Jun 7, 2016 · US
Ammonia-engine system
US-9341111-B2 · May 17, 2016 · US
Process for selective hydrogenation in the presence of a catalyst based on a metal from group VIII prepared using at least one cyclic oligosaccharide
US-9328039-B2 · May 3, 2016 · US
Monolith structure loaded with metal promoted nanozeolites for enhanced propylene selectivity in methanol conversion
US-2016114314-A1 · Apr 28, 2016 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC B01J23/74?
- CPC B01J23/74 is the Cooperative Patent Classification code for “Iron group metals.”
- How many patents are filed under CPC B01J23/74 (Iron group metals)?
- Our database includes 302 publications tagged with this CPC code.
- Is patent activity under CPC B01J23/74 growing?
- Publication counts under this code: 19 in 2024 vs 14 in 2025 (latest complete years).