Production of aromatic acids and phenolics
US-12528758-B2 · Jan 20, 2026 · US
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by replacing a carboxyl or aldehyde group by a hydroxy group
by replacing a carboxyl or aldehyde group by a hydroxy group · 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 | C07C37/56 |
| Official title | by replacing a carboxyl or aldehyde group by a hydroxy group |
| Display label | by replacing a carboxyl or aldehyde group by a hydroxy group |
| Total patents | 18 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2016 | 1 |
| 2018 | 2 |
| 2019 | 2 |
| 2020 | 1 |
| 2021 | 2 |
| 2022 | 3 |
| 2023 | 2 |
| 2024 | 3 |
| 2025 | 1 |
| 2026 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Precursors of phenolic fragrant compounds
US-2025243427-A1 · Jul 31, 2025 · US
Method for decomposing phenol-based by-product
US-12084408-B2 · Sep 10, 2024 · US
Rescorcinols, methods for their manufacture, and uses thereof
US-2024254066-A1 · Aug 1, 2024 · US
Production of aromatic acids and phenolics
US-2024067593-A1 · Feb 29, 2024 · US
Phenol recovery of bisphenol-a mother liquor purge using purification train in the phenol production unit
US-2023406797-A1 · Dec 21, 2023 · US
High purity 4-hydroxystyrene solution, method of producing the same, and method of producing 4-hydroxystyrene polymer
US-2023242467-A1 · Aug 3, 2023 · US
Method for decomposing phenol-based by-product
US-2022281791-A1 · Sep 8, 2022 · US
3,3,3',3'-tetramethyl-1,1'-spirobiindane-based monophosphine ligand, intermediates thereof, preparation method and use of the same
US-11377457-B2 · Jul 5, 2022 · US
Method for producing a hydroxy compound by decarboxylation in the presence of a bronsted base
US-2022017442-A1 · Jan 20, 2022 · US
3,3,3',3'-tetramethyl-1,1'-spirobiindane-based monophosphine ligand, intermedates tehreof, preparation method and use of the same
US-2021070789-A1 · Mar 11, 2021 · US
Method for producing alcohol compound
US-10919829-B2 · Feb 16, 2021 · US
Aromatic compounds from furanics
US-10562875-B2 · Feb 18, 2020 · US
Method for producing alcohol compound
US-2019300465-A1 · Oct 3, 2019 · US
Aromatic compounds from furanics
US-2019023678-A1 · Jan 24, 2019 · US
Concerted processes for forming 1,2,4-trihydroxybenzene from hydroquinone
US-10065977-B2 · Sep 4, 2018 · US
Concerted processes for forming 1,2,4-trihydroxybenzene from hydroquinone
US-2018105544-A1 · Apr 19, 2018 · US
Fuel reforming system
US-2016333283-A1 · Nov 17, 2016 · US