Method for producing isobutylene, method for producing methacrylic acid, and method for producing methyl methacrylate
US-12570598-B2 · Mar 10, 2026 · US
with molecular oxygen
with molecular oxygen · Cooperative Patent Classification (CPC)
Chemical and metallurgical processes, compounds, and materials.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | C07C51/21 |
| Official title | with molecular oxygen |
| Display label | with molecular oxygen |
| Total patents | 38 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is stable.
| Year | Patents |
|---|---|
| 2015 | 6 |
| 2016 | 3 |
| 2017 | 7 |
| 2018 | 4 |
| 2019 | 3 |
| 2020 | 3 |
| 2021 | 1 |
| 2022 | 2 |
| 2023 | 5 |
| 2024 | 2 |
| 2025 | 1 |
| 2026 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Integrated processes utilizing water electrolysis and oxidative dehydrogenation of ethane
US-2025066274-A1 · Feb 27, 2025 · US
Lignin-degrading catalyst, method for manufacturing same, method for degrading lignin, and method for regenerating lignin-degrading catalyst
US-2024299913-A1 · Sep 12, 2024 · US
Integrated system comprising electrocatalysis device of glycerol and chemical catalysis device of biomass
US-12043910-B2 · Jul 23, 2024 · US
Oxidative dehydrogenation coproduction
US-11760704-B2 · Sep 19, 2023 · US
Molybdenum-vanadium-niobium-ceria-based catalyst for oxidative dehydrogenation of alkanes and/or alkene oxidation
US-11707731-B2 · Jul 25, 2023 · US
Method for producing oxide catalyst, and method for producing unsaturated nitrile and unsaturated acid
US-11612880-B2 · Mar 28, 2023 · US
Formic acid production method and formic acid production system
US-2023046627-A1 · Feb 16, 2023 · US
Method for producing isobutylene, method for producing methacrylic acid, and method for producing methyl methacrylate
US-2023027797-A1 · Jan 26, 2023 · US
Catalyst
US-2022387976-A1 · Dec 8, 2022 · US
Oxidative dehydrogenation coproduction
US-2022251004-A1 · Aug 11, 2022 · US
Molybdenum-vanadium-niobium-ceria-based catalyst for oxidative dehydrogenation of alkanes and/or alkene oxidation
US-2021346869-A1 · Nov 11, 2021 · US
Integrated system comprising electrocatalysis device of glycerol and chemical catalysis device of biomass
US-2020399767-A1 · Dec 24, 2020 · US
Process for purifying (meth)acrylic acid including a dividing-wall distillation column
US-10815182-B2 · Oct 27, 2020 · US
Process for purifying (meth)acrylic acid including a dividing-wall distillation column
US-2020115311-A1 · Apr 16, 2020 · US
Method for producing oxide catalyst, and method for producing unsaturated nitrile and unsaturated acid
US-2019262800-A1 · Aug 29, 2019 · US
Method for producing acrylic acid
US-10266475-B2 · Apr 23, 2019 · US
Process for producing (meth)acrylic acid
US-10239816-B2 · Mar 26, 2019 · US
Method of catalytic oxidation of lignite using oxygen as oxidant at atmospheric pressure
US-10160712-B2 · Dec 25, 2018 · US
Method of catalytic oxidation of lignite using oxygen as oxidant at atmospheric pressure
US-2018237371-A1 · Aug 23, 2018 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C07C51/21?
- CPC C07C51/21 is the Cooperative Patent Classification code for “with molecular oxygen.”
- How many patents are filed under CPC C07C51/21 (with molecular oxygen)?
- Our database includes 38 publications tagged with this CPC code.
- Is patent activity under CPC C07C51/21 growing?
- Publication counts under this code: 2 in 2024 vs 1 in 2025 (latest complete years).