Methods for preparing diol
US-10464870-B2 · Nov 5, 2019 · US
1,3-Propanediol; 1,2-Propanediol
1,3-Propanediol; 1,2-Propanediol · 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 | C07C31/205 |
| Official title | {1,3-Propanediol; 1,2-Propanediol} |
| Display label | 1,3-Propanediol; 1,2-Propanediol |
| Total patents | 150 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is stable.
| Year | Patents |
|---|---|
| 2015 | 12 |
| 2016 | 13 |
| 2017 | 10 |
| 2018 | 21 |
| 2019 | 30 |
| 2020 | 22 |
| 2021 | 11 |
| 2022 | 1 |
| 2023 | 16 |
| 2024 | 3 |
| 2025 | 9 |
| 2026 | 2 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Methods and compositions incorporating alkyl polyglycoside surfactant for use in oil and/or gas wells
US-10421707-B2 · Sep 24, 2019 · US
Method for the production of glycols from sorbitol
US-10414708-B2 · Sep 17, 2019 · US
Method for the production of glycols from sorbitol
US-2019225565-A1 · Jul 25, 2019 · US
Process for the preparation of glycols
US-2018362424-A1 · Dec 20, 2018 · US
Process for the preparation of glycols
US-2018362425-A1 · Dec 20, 2018 · US
Hydrogenation or hydrogenolysis process
US-2018361357-A1 · Dec 20, 2018 · US
Method for producing propylene glycol from propene and hydrogen peroxide
US-2018354878-A1 · Dec 13, 2018 · US
Process for making biobased propylene glycol from lactic acid esters
US-10138186-B2 · Nov 27, 2018 · US
Catalysts for hydrodeoxygenation of oxygenated hydrocarbons
US-10131604-B2 · Nov 20, 2018 · US
Hydrogenation reaction method
US-10106488-B2 · Oct 23, 2018 · US
Polymers and membranes for separation of polar organic compounds from aqueous mixtures and methods of using
US-10086339-B2 · Oct 2, 2018 · US
Process for the preparation of a hydrogenation catalyst and its use for the preparation of glycols
US-2018272319-A1 · Sep 27, 2018 · US
Process for the separation of glycols
US-10081584-B2 · Sep 25, 2018 · US
Process for the preparation of ethylene glycol from sugars
US-10077222-B2 · Sep 18, 2018 · US
Fuel processor component for a propylene glycol fuel processor and propylene glycol fuel processor
US-2018236431-A1 · Aug 23, 2018 · US
Propylene glycol reforming
US-2018237296-A1 · Aug 23, 2018 · US
Copper-containing multimetallic catalysts, and method for using the same to make biobased 1,2-propanediol
US-2018201559-A1 · Jul 19, 2018 · US
Process for the preparation of glycols
US-2018187219-A1 · Jul 5, 2018 · US
Method for polyol synthesis from triacylglyceride oils
US-2018170845-A1 · Jun 21, 2018 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C07C31/205?
- CPC C07C31/205 is the Cooperative Patent Classification code for “1,3-Propanediol; 1,2-Propanediol.”
- How many patents are filed under CPC C07C31/205 (1,3-Propanediol; 1,2-Propanediol)?
- Our database includes 150 publications tagged with this CPC code.
- Is patent activity under CPC C07C31/205 growing?
- Publication counts under this code: 3 in 2024 vs 9 in 2025 (latest complete years).