Process for preparation of intermediates
US-12559466-B2 · Feb 24, 2026 · US
Chemistry & Metallurgy
Chemistry & Metallurgy · 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 | C07D301/28 |
| Official title | — |
| Display label | Chemistry & Metallurgy (mapped technology topic) |
| Total patents | 52 |
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 | 5 |
| 2016 | 7 |
| 2017 | 6 |
| 2018 | 8 |
| 2019 | 2 |
| 2020 | 1 |
| 2021 | 7 |
| 2022 | 8 |
| 2023 | 4 |
| 2024 | 1 |
| 2025 | 1 |
| 2026 | 2 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Epoxy reactive diluent and manufacturing method therefor
US-12516031-B2 · Jan 6, 2026 · US
Electrosynthesis of oxiranes
US-12291794-B2 · May 6, 2025 · US
Fused ring aromatic hydrocarbon derivative, preparation method therefor, and use thereof in lithography
US-2024174656-A1 · May 30, 2024 · US
Aromatic diol compounds, diepoxide compounds, polymers prepared from such compounds, and methods for making the same
US-2023416449-A1 · Dec 28, 2023 · US
Methods for preparing liquid-solid phase change proppant with a controllable particle size based on emulsified resin
US-11708527-B1 · Jul 25, 2023 · US
Electrosynthesis of oxiranes
US-2023146508-A1 · May 11, 2023 · US
Process for preparation of fungicidally active triazole compounds
US-11634394-B2 · Apr 25, 2023 · US
Bisphenol a derivative, preparation method therefor and use thereof in photolithography
US-2022373885-A1 · Nov 24, 2022 · US
Polyepoxidized biphenyl compounds, preparation and uses
US-11499002-B2 · Nov 15, 2022 · US
Epoxy reactive diluent and manufacturing method therefor
US-11434215-B2 · Sep 6, 2022 · US
Epoxy reactive diluent and manufacturing method therefor
US-2022235020-A1 · Jul 28, 2022 · US
Side chain liquid crystal epoxy monomer (S-LCEM) and preparation method thereof, and side chain liquid crystal epoxy resin (S-LCER) with high intrinsic thermal conductivity
US-11384287-B2 · Jul 12, 2022 · US
Method for producing polyfunctional sulfur-containing epoxy compound
US-11377433-B2 · Jul 5, 2022 · US
Oxirane-functional vinyl monomers and methods for making the same
US-2022145114-A1 · May 12, 2022 · US
Process for preparation of fungicidally active triazole compounds
US-2022089552-A1 · Mar 24, 2022 · US
Polyepoxidized biphenyl compounds, preparation and uses
US-2021403636-A1 · Dec 30, 2021 · US
Side chain liquid crystal epoxy monomer (s-lcem) and preparation method thereof, and side chain liquid crystal epoxy resin (s-lcer) with high intrinsic thermal conductivity
US-2021246372-A1 · Aug 12, 2021 · US
Compound, composition, and method for producing same, underlayer film forming material for lithography, composition for underlayer film formation for lithography, and purification method
US-11067889-B2 · Jul 20, 2021 · US
Epoxy reactive diluent and manufacturing method therefor
US-2021163435-A1 · Jun 3, 2021 · US
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Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C07D301/28?
- CPC C07D301/28 is the Cooperative Patent Classification code for “Chemistry & Metallurgy.”
- How many patents are filed under CPC C07D301/28 (Chemistry & Metallurgy)?
- Our database includes 52 publications tagged with this CPC code.
- Is patent activity under CPC C07D301/28 growing?
- Publication counts under this code: 1 in 2024 vs 1 in 2025 (latest complete years).