Method of purifying carboxylic acid fluoride
US-12486213-B2 · Dec 2, 2025 · US
Separation; Purification; Stabilisation; Use of additives
Separation; Purification; Stabilisation; Use of additives · 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 | C07C51/64 |
| Official title | Separation; Purification; Stabilisation; Use of additives |
| Display label | Separation; Purification; Stabilisation; Use of additives |
| Total patents | 48 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 2 |
| 2017 | 3 |
| 2018 | 3 |
| 2019 | 3 |
| 2020 | 6 |
| 2021 | 8 |
| 2022 | 4 |
| 2023 | 3 |
| 2024 | 12 |
| 2025 | 4 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Preparation and purification of cis-2-alkenoic acids
US-2025346551-A1 · Nov 13, 2025 · US
Salt crystals
US-2025129087-A1 · Apr 24, 2025 · US
Processes for producing trifluoroiodomethane and trifluoroacetyl iodide
US-12281053-B2 · Apr 22, 2025 · US
An integrated process for producing trifluoroiodomethane
US-2024425435-A1 · Dec 26, 2024 · US
Processes for preparing aldaric, aldonic, and uronic acids
US-12122745-B2 · Oct 22, 2024 · US
Methods for removal of sulfur dioxide (so2) from trifluoroacetyl chloride (tfac)
US-2024300884-A1 · Sep 12, 2024 · US
Methods for solvation and removal of iodine (i2)-containing species
US-2024279151-A1 · Aug 22, 2024 · US
Methods for removal of sulfur dioxide (SO2) from trifluoroacetyl chloride (TFAC)
US-11987553-B2 · May 21, 2024 · US
Processes for producing trifluoroiodomethane and trifluoroacetyl iodide
US-2024150267-A1 · May 9, 2024 · US
Processes for producing trifluoroiodomethane and trifluoroacetyl iodide
US-11884607-B2 · Jan 30, 2024 · US
Ferulic acid granules and method for the preparation thereof
US-2024025836-A1 · Jan 25, 2024 · US
Method for reducing impurities in trifluoroiodomethane process
US-2024018072-A1 · Jan 18, 2024 · US
Integrated carboxylic acid production from synthesis gas
US-2024010596-A1 · Jan 11, 2024 · US
Synergistic antifoulant compositions and methods of using the same
US-2024010916-A1 · Jan 11, 2024 · US
Synergistic antifoulant compositions and methods of using the same
US-2024010758-A1 · Jan 11, 2024 · US
Synergistic antifoulant compositions and methods of using the same
US-2023312767-A1 · Oct 5, 2023 · US
Processes for preparing aldaric, aldonic, and uronic acids
US-2023028813-A1 · Jan 26, 2023 · US
Azeotrope or azeotrope-like compositions of trifluoroiodomethane (CF3I) and trifluoroacetyl chloride (CF3COCI)
US-11555136-B2 · Jan 17, 2023 · US
Method of purifying carboxylic acid fluoride
US-2022402850-A1 · Dec 22, 2022 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C07C51/64?
- CPC C07C51/64 is the Cooperative Patent Classification code for “Separation; Purification; Stabilisation; Use of additives.”
- How many patents are filed under CPC C07C51/64 (Separation; Purification; Stabilisation; Use of additives)?
- Our database includes 48 publications tagged with this CPC code.
- Is patent activity under CPC C07C51/64 growing?
- Publication counts under this code: 12 in 2024 vs 4 in 2025 (latest complete years).