Pyridone derivatives having tetrahydropyranylmethyl groups
US-11208403-B2 · Dec 28, 2021 · US
Naphthalene sulfonic acids
Naphthalene 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 | C07C309/35 |
| Official title | Naphthalene sulfonic acids |
| Display label | Naphthalene sulfonic acids |
| Total patents | 98 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is growing.
| Year | Patents |
|---|---|
| 2015 | 3 |
| 2016 | 14 |
| 2017 | 11 |
| 2018 | 10 |
| 2019 | 10 |
| 2020 | 8 |
| 2021 | 8 |
| 2022 | 10 |
| 2023 | 6 |
| 2024 | 4 |
| 2025 | 12 |
| 2026 | 2 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Resist composition and resist patterning process
US-11131926-B2 · Sep 28, 2021 · US
Salts and crystal forms of omecamtiv mecarbil
US-2021221771-A1 · Jul 22, 2021 · US
Acid addition salts of apomorphine, pharmaceutical compositions containing the same, and methods of using the same
US-2021179561-A1 · Jun 17, 2021 · US
Phenothiazine diaminium salts and their use
US-10864216-B2 · Dec 15, 2020 · US
Sulfonate composition and preservative composition comprising the sulfonate composition
US-2020354313-A1 · Nov 12, 2020 · US
Processes of making and crystalline forms of a mdm2 inhibitor
US-2020281912-A1 · Sep 10, 2020 · US
Phenothiazine diaminium salts and their use
US-2020246350-A1 · Aug 6, 2020 · US
Method for producing polymeric ring-opening products
US-2020190261-A1 · Jun 18, 2020 · US
Weakly coloured sulfonic acid
US-2020181072-A1 · Jun 11, 2020 · US
Salts of an epidermal growth factor receptor kinase inhibitor
US-10570099-B2 · Feb 25, 2020 · US
Pyridone derivatives having tetrahydropyranylmethyl groups
US-2020010458-A1 · Jan 9, 2020 · US
Molecular host frameworks and methods of making and using same
US-2019375706-A1 · Dec 12, 2019 · US
Pyridone derivatives having tetrahydropyranylmethyl groups
US-10442797-B2 · Oct 15, 2019 · US
Formulations of a macrocyclic trk kinase inhibitor
US-2019247398-A1 · Aug 15, 2019 · US
Crystalline forms of tenofovir alafenamide
US-2019233448-A1 · Aug 1, 2019 · US
Coating Composition Comprising Compound, And Organic Light Emitting Device Comprising Same
US-2019189926-A1 · Jun 20, 2019 · US
Salts of an epidermal growth factor receptor kinase inhibitor
US-2019152925-A1 · May 23, 2019 · US
Crystalline forms of tenofovir alafenamide
US-10287307-B2 · May 14, 2019 · US
Phenothiazine diaminium salts and their use
US-2019046537-A1 · Feb 14, 2019 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C07C309/35?
- CPC C07C309/35 is the Cooperative Patent Classification code for “Naphthalene sulfonic acids.”
- How many patents are filed under CPC C07C309/35 (Naphthalene sulfonic acids)?
- Our database includes 98 publications tagged with this CPC code.
- Is patent activity under CPC C07C309/35 growing?
- Publication counts under this code: 4 in 2024 vs 12 in 2025 (latest complete years).