Processes for purification, recovery, and conversion of chlorophenol salts and preparation and recovery of products prepared therefrom
US-12240807-B2 · Mar 4, 2025 · US
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by azeotropic distillation
by azeotropic distillation · 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 | C07C37/78 |
| Official title | by azeotropic distillation |
| Display label | by azeotropic distillation |
| Total patents | 12 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2019 | 2 |
| 2020 | 3 |
| 2021 | 4 |
| 2023 | 2 |
| 2025 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Processes for purification, recovery, and conversion of chlorophenol salts and preparation and recovery of products prepared therefrom
US-2023202961-A1 · Jun 29, 2023 · US
Processes for purification, recovery, and conversion of chlorophenol salts and preparation and recovery of products prepared therefrom
US-11629114-B2 · Apr 18, 2023 · US
Method for purifying phenol
US-11084771-B2 · Aug 10, 2021 · US
Method for purifying phenol
US-2021198170-A1 · Jul 1, 2021 · US
Processes for purification, recovery, and conversion of chlorophenol salts and preparation and recovery of products prepared therefrom
US-2021163395-A1 · Jun 3, 2021 · US
Processes for purification, recovery, and conversion of chlorophenol salts and preparation and recovery of products prepared therefrom
US-10913701-B2 · Feb 9, 2021 · US
Method for purifying phenol
US-10766843-B2 · Sep 8, 2020 · US
Method for purifying phenol
US-2020079716-A1 · Mar 12, 2020 · US
Method for purifying phenol
US-10532968-B2 · Jan 14, 2020 · US
Processes for purification, recovery, and conversion of chlorophenol salts and preparation and recovery of products prepared therefrom
US-2019322612-A1 · Oct 24, 2019 · US
Method for purifying phenol
US-2019023634-A1 · Jan 24, 2019 · US