Ammoxidation catalyst for propylene, manufacturing method of the same catalyst, ammoxidation method using the same catalyst
US-12569835-B2 · Mar 10, 2026 · US
combined with bismuth
combined with bismuth · 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 | B01J23/31 |
| Official title | combined with bismuth |
| Display label | combined with bismuth |
| Total patents | 60 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is growing.
| Year | Patents |
|---|---|
| 2015 | 6 |
| 2016 | 5 |
| 2017 | 5 |
| 2018 | 8 |
| 2019 | 4 |
| 2020 | 6 |
| 2021 | 3 |
| 2022 | 6 |
| 2023 | 7 |
| 2024 | 5 |
| 2025 | 4 |
| 2026 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Dielectric material comprising bismuth compound and method of making the same
US-12502662-B2 · Dec 23, 2025 · US
Catalyst for the manufacture of acrylonitrile
US-2025319457-A1 · Oct 16, 2025 · US
Bismuth tungstate/bismuth sulfide/molybdenum disulfide heterojunction ternary composite material and preparation method and application thereof
US-12234193-B2 · Feb 25, 2025 · US
Perylene imide and composite photocatalytic material thereof, preparation method therefor and application thereof in removing organic pollutants from water
US-12226759-B2 · Feb 18, 2025 · US
Catalyst and process for the dehydrogenation of alkanes to olefins
US-2024351004-A1 · Oct 24, 2024 · US
Method for producing a catalyst for oxidative dehydrogenation of butene
US-12076709-B2 · Sep 3, 2024 · US
Production of acrolein or acrylic acid from iso-propanol with high yeild and low cost
US-2024228417-A9 · Jul 11, 2024 · US
Production of acrolein or acrylic acid from iso-propanol with high yeild and low cost
US-2024132433-A1 · Apr 25, 2024 · US
Catalyst for gas-phase catalytic ammoxidation reaction and method for producing catalyst for gas-phase catalytic ammoxidation reaction
US-2024075464-A1 · Mar 7, 2024 · US
Ammoxidation catalyst, preparation method therefor, and method for preparing acrylonitirle using the ammoxidation catalyst
US-2023373908-A1 · Nov 23, 2023 · US
Arsine adsorbents
US-11745161-B2 · Sep 5, 2023 · US
Method for producing a catalyst for oxidative dehydrogenation of butene
US-2023271169-A1 · Aug 31, 2023 · US
Method for producing a multimetal oxide catalyst
US-2023256426-A1 · Aug 17, 2023 · US
Dielectric material comprising bismuth compound and method of making the same
US-2023166248-A1 · Jun 1, 2023 · US
Catalyst for oxidative dehydrogenation of butene and method for producing the same
US-11648536-B2 · May 16, 2023 · US
Ammoxidation catalyst for propylene, manufacturing method of the same catalyst, ammoxidation method using the same catalyst
US-2023057640-A1 · Feb 23, 2023 · US
Perylene imide and composite photocatalytic material thereof, preparation method therefor and application thereof in removing organic pollutants from water
US-2022355284-A1 · Nov 10, 2022 · US
Bismuth tungstate/bismuth sulfide/molybdenum disulfide heterojunction ternary composite material and preparation method and application thereof
US-2022315492-A1 · Oct 6, 2022 · US
Method for producing butadiene
US-11447435-B2 · Sep 20, 2022 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC B01J23/31?
- CPC B01J23/31 is the Cooperative Patent Classification code for “combined with bismuth.”
- How many patents are filed under CPC B01J23/31 (combined with bismuth)?
- Our database includes 60 publications tagged with this CPC code.
- Is patent activity under CPC B01J23/31 growing?
- Publication counts under this code: 5 in 2024 vs 4 in 2025 (latest complete years).