Sodium petroleum sulfonate collector for fluorite flotation and its preparation and application method
US-12472512-B2 · Nov 18, 2025 · US
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Sulfonic acids
Sulfonic acids · 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 | C07C309/01 |
| Official title | Sulfonic acids |
| Display label | Sulfonic acids |
| Total patents | 19 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2016 | 4 |
| 2017 | 3 |
| 2018 | 2 |
| 2019 | 3 |
| 2020 | 2 |
| 2022 | 1 |
| 2023 | 2 |
| 2025 | 2 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
2,2,6-trimethyl-4,5-dihydro-3H-oxepine as aroma ingredient
US-12338225-B2 · Jun 24, 2025 · US
Photoresist pattern trimming compositions and pattern formation methods
US-11754927-B2 · Sep 12, 2023 · US
Sodium petroleum sulfonate collector for fluorite flotation and its preparation and application method
US-2023143136-A1 · May 11, 2023 · US
2,2,6-trimethyl-4,5-dihydro-3h-oxepine as aroma ingredient
US-2022281834-A1 · Sep 8, 2022 · US
Photoresist pattern trimming compositions and pattern formation methods
US-2020379353-A1 · Dec 3, 2020 · US
Process for purifying alkanesulfonic acids
US-10577312-B2 · Mar 3, 2020 · US
Method for preparing fluorine-18 eluent with adjusted PH, and method for labelling fluorine-18 using same
US-10392344-B2 · Aug 27, 2019 · US
Stable electrolyte for lithium air battery and lithium air battery including the same
US-10256516-B2 · Apr 9, 2019 · US
Acid generator compounds and photoresists comprising same
US-10221131-B2 · Mar 5, 2019 · US
Process for purifying alkanesulfonic acids
US-2018319739-A1 · Nov 8, 2018 · US
Thermal acid generators and photoresist pattern trimming compositions and methods
US-10007179-B2 · Jun 26, 2018 · US
Photoresist pattern trimming compositions and methods
US-9696629-B2 · Jul 4, 2017 · US
Stable electrolyte for lithium air battery and lithium air battery including the same
US-2017149104-A1 · May 25, 2017 · US
Thermal acid generators and photoresist pattern trimming compositions and methods
US-2017123314-A1 · May 4, 2017 · US
Acid generator compounds and photoresists comprising same
US-2016347709-A1 · Dec 1, 2016 · US
Short Hydrophobe Anionic Surfactants
US-2016264847-A1 · Sep 15, 2016 · US
Photoresist pattern trimming compositions and methods
US-2016187783-A1 · Jun 30, 2016 · US
Diaryliodonium salt
US-2016046566-A1 · Feb 18, 2016 · US