An integrated process to produce phenol from coal derived liquid
US-2025197331-A1 · Jun 19, 2025 · US
Purification; separation; Use of additives, e.g. for stabilisation {(C07C37/004 and C07C37/005 take precedence)}
Purification; separation; Use of additives, e.g. for stabilisation {(C07C37/004 and C07C37/005 take precedence)} · 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 | C07C37/68 |
| Official title | Purification; separation; Use of additives, e.g. for stabilisation {(C07C37/004 and C07C37/005 take precedence)} |
| Display label | Purification; separation; Use of additives, e.g. for stabilisation {(C07C37/004 and C07C37/005 take precedence)} |
| Total patents | 42 |
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 | 13 |
| 2016 | 5 |
| 2017 | 5 |
| 2018 | 3 |
| 2019 | 6 |
| 2020 | 3 |
| 2022 | 2 |
| 2023 | 1 |
| 2024 | 3 |
| 2025 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Process for producing cresol and xylene
US-2024383829-A1 · Nov 21, 2024 · US
Methods of purifying cannabinoids
US-2024368643-A1 · Nov 7, 2024 · US
Method of decomposing phenolic by-products
US-11993564-B2 · May 28, 2024 · US
Cannabidiol-type cannabinoid compound
US-2023022487-A1 · Jan 26, 2023 · US
Method of decomposing phenolic by-products
US-2022259125-A1 · Aug 18, 2022 · US
Cannabidiol-type cannabinoid compound
US-2022016048-A1 · Jan 20, 2022 · US
Polyhydric phenol compound and method of producing same
US-10851039-B2 · Dec 1, 2020 · US
Apparatus and method for preparing bisphenol A
US-10683251-B2 · Jun 16, 2020 · US
Apparatus and method for preparing bisphenol a
US-2020017431-A1 · Jan 16, 2020 · US
System for producing phenol and bisphenol A including removal unit for removing methanol and acetone
US-10457620-B2 · Oct 29, 2019 · US
Apparatus and method for preparing bisphenol A
US-10442746-B2 · Oct 15, 2019 · US
System for producing phenol and bisphenol a including removal unit for removing methanol and acetone
US-2019225567-A1 · Jul 25, 2019 · US
Method for recovering phenol and acetone from cracking reaction product of bisphenol-A residue
US-10358403-B2 · Jul 23, 2019 · US
Polyhydric phenol compound and method of producing same
US-2019210947-A1 · Jul 11, 2019 · US
Compound, resin, material for forming underlayer film for lithography, underlayer film for lithography, pattern forming method, and method for purifying the compound or resin
US-10294183-B2 · May 21, 2019 · US
Sythesis of bisphenols
US-10155709-B2 · Dec 18, 2018 · US
Apparatus and method for preparing bisphenol a
US-2018312456-A1 · Nov 1, 2018 · US
METHOD FOR RECOVERING PHENOL AND ACETONE FROM CRACKING REACTION PRODUCT OF BISPHENOL-A RESIDUE (As Amended)
US-2018290954-A1 · Oct 11, 2018 · US
Sythesis of bisphenols
US-2017174598-A1 · Jun 22, 2017 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C07C37/68?
- CPC C07C37/68 is the Cooperative Patent Classification code for “Purification; separation; Use of additives, e.g. for stabilisation {(C07C37/004 and C07C37/005 take precedence)}.”
- How many patents are filed under CPC C07C37/68 (Purification; separation; Use of additives, e.g. for stabilisation {(C07C37/004 and C07C37/005 take precedence)})?
- Our database includes 42 publications tagged with this CPC code.
- Is patent activity under CPC C07C37/68 growing?
- Publication counts under this code: 3 in 2024 vs 1 in 2025 (latest complete years).