Production of glycolaldehyde by thermolytic fragmentation
US-2022402848-A1 · Dec 22, 2022 · US
by change in the physical state, e.g. crystallisation
by change in the physical state, e.g. crystallisation · 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 | C07C45/81 |
| Official title | by change in the physical state, e.g. crystallisation |
| Display label | by change in the physical state, e.g. crystallisation |
| Total patents | 89 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 1 |
| 2016 | 12 |
| 2017 | 6 |
| 2018 | 4 |
| 2019 | 12 |
| 2020 | 12 |
| 2021 | 10 |
| 2022 | 5 |
| 2023 | 7 |
| 2024 | 12 |
| 2025 | 7 |
| 2026 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Production of glycolaldehyde by thermolytic fragmentation
US-11472761-B2 · Oct 18, 2022 · US
Method for decreasing the concentration of a metal in a monomer composition comprising bis(benzoyl)benzene
US-11420920-B2 · Aug 23, 2022 · US
Device for fermentation integrated with separation and purification of alcohols
US-2021363553-A1 · Nov 25, 2021 · US
Process for recovering close boiling products
US-2021355055-A1 · Nov 18, 2021 · US
Production of glycolaldehyde by thermolytic fragmentation
US-2021292263-A1 · Sep 23, 2021 · US
Method and device for fermentation integrated with separation and purification of alcohols
US-11118198-B2 · Sep 14, 2021 · US
Process for recovering close boiling products
US-11091415-B2 · Aug 17, 2021 · US
Ripening of 1,4-bis (4-phenoxybenzoyl)benzene
US-2021155570-A1 · May 27, 2021 · US
Process for the recovery of ketones and glycols from fermentation
US-10988428-B2 · Apr 27, 2021 · US
Ripening of 1,4-bis (4-phenoxybenzoyl)benzene
US-10981852-B2 · Apr 20, 2021 · US
Method for purification of 4-hydroxyacetophenone
US-10981854-B2 · Apr 20, 2021 · US
Method for purification of 4-hydroxyacetophenone
US-2021002200-A1 · Jan 7, 2021 · US
Synthesis of intermediates for producing prostacyclin derivatives
US-2020369592-A1 · Nov 26, 2020 · US
Dissociation of 1,4-bis (4-phenoxybenzoyl)benzene—Lewis acid complex in a protic solvent
US-10793500-B2 · Oct 6, 2020 · US
Process for the recovery of ketones and glycols from fermentation
US-2020299218-A1 · Sep 24, 2020 · US
Synthesis of intermediates for producing prostacyclin derivatives
US-10774027-B2 · Sep 15, 2020 · US
Method for purification of 4-hydroxyacetophenone
US-10752571-B2 · Aug 25, 2020 · US
Production method for tagatose
US-10745720-B2 · Aug 18, 2020 · US
Process for purifying a crude composition including a monoterpene compound, such as a monocyclic monoterpene alcohol, by layer melt crystallization
US-10745332-B2 · Aug 18, 2020 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C07C45/81?
- CPC C07C45/81 is the Cooperative Patent Classification code for “by change in the physical state, e.g. crystallisation.”
- How many patents are filed under CPC C07C45/81 (by change in the physical state, e.g. crystallisation)?
- Our database includes 89 publications tagged with this CPC code.
- Is patent activity under CPC C07C45/81 growing?
- Publication counts under this code: 12 in 2024 vs 7 in 2025 (latest complete years).