Method for producing ultra-pure bis(chlorosulfonyl)imide
US-2024391774-A1 · Nov 28, 2024 · US
Separation; Purification
Separation; Purification · 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 | C07C303/44 |
| Official title | Separation; Purification |
| Display label | Separation; Purification |
| Total patents | 121 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is stable.
| Year | Patents |
|---|---|
| 2015 | 8 |
| 2016 | 13 |
| 2017 | 7 |
| 2018 | 14 |
| 2019 | 10 |
| 2020 | 20 |
| 2021 | 11 |
| 2022 | 16 |
| 2023 | 3 |
| 2024 | 7 |
| 2025 | 12 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Method for producing C2-C20 fluorine-containing organic acid, and composition comprising C2-C20 fluorine-containing organic acid
US-10759731-B2 · Sep 1, 2020 · US
Hydrated crystalline form of 2-acrylamido-2-methylpropane sulfonic acid
US-10759746-B2 · Sep 1, 2020 · US
Method for producing fluorine-containing sulfonylamide compound
US-10717705-B2 · Jul 21, 2020 · US
Method for producing 2-acrylamido-2-methylpropane sulphonic acid
US-10669231-B2 · Jun 2, 2020 · US
Method for treating a suspension of solid particles in water using a (co)polymer of a hydrated crystalline form of 2-acrylamido-2-methylpropanesulfonic acid
US-2020087186-A1 · Mar 19, 2020 · US
Process for purifying alkanesulfonic anhydride and process for producing alkanesulfonic acid using the purified alkanesulfonic anhydride
US-2020039927-A1 · Feb 6, 2020 · US
New method for producing 2-acrylamido-2-methylpropane sulphonic acid
US-2020024228-A1 · Jan 23, 2020 · US
Chiral resolution method of N-[4-(1-aminoethyl)-phenyl]-sulfonamide derivatives
US-10479763-B2 · Nov 19, 2019 · US
Method for producing c2-c20 fluorine-containing organic acid, and composition comprising c2-c20 fluorine-containing organic acid
US-2019330135-A1 · Oct 31, 2019 · US
Systems and methods for separating mixtures comprising fluorocarboxylic and carboxylic acids
US-2019330380-A1 · Oct 31, 2019 · US
Process for the preparation of a sulfated derivative of 3,5-diiodo-o-[3-iodophenyl]-l-tyrosine
US-10457635-B2 · Oct 29, 2019 · US
Alkylaromatic sulfonate compositions from mixed hydrocarbons
US-10435359-B2 · Oct 8, 2019 · US
Process for preparing 4[[(benzoyl)amino]sulphonyl]benzoyl chlorides and preparation of acylsulphamoylbenzamides
US-10421713-B2 · Sep 24, 2019 · US
Compound Comprising Certain Level Of Bio-Based Carbon
US-2019241509-A1 · Aug 8, 2019 · US
Method for producing fluorine-containing sulfonylamide compound
US-2019233368-A1 · Aug 1, 2019 · US
Alkylaromatic sulfonate compositions from mixed hydrocarbons
US-10351520-B2 · Jul 16, 2019 · US
Method of reprocessing alkanesulfonic acid
US-10214485-B2 · Feb 26, 2019 · US
Method of reprocessing alkanesulfonic acid
US-2018327352-A1 · Nov 15, 2018 · US
Process for purifying alkanesulfonic acids
US-2018319739-A1 · Nov 8, 2018 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C07C303/44?
- CPC C07C303/44 is the Cooperative Patent Classification code for “Separation; Purification.”
- How many patents are filed under CPC C07C303/44 (Separation; Purification)?
- Our database includes 121 publications tagged with this CPC code.
- Is patent activity under CPC C07C303/44 growing?
- Publication counts under this code: 7 in 2024 vs 12 in 2025 (latest complete years).