Substrate treating method and treatment liquid
US-2024339317-A1 · Oct 10, 2024 · US
Heterocyclic compounds containing nitrogen in the ring
Heterocyclic compounds containing nitrogen in the ring · 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 | C11D3/28 |
| Official title | Heterocyclic compounds containing nitrogen in the ring |
| Display label | Heterocyclic compounds containing nitrogen in the ring |
| Total patents | 415 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is stable.
| Year | Patents |
|---|---|
| 2015 | 27 |
| 2016 | 35 |
| 2017 | 39 |
| 2018 | 33 |
| 2019 | 33 |
| 2020 | 40 |
| 2021 | 36 |
| 2022 | 44 |
| 2023 | 33 |
| 2024 | 46 |
| 2025 | 34 |
| 2026 | 15 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Fabric treatment compositions comprising benefit agent capsules
US-2024199992-A1 · Jun 20, 2024 · US
Composition and method for treating water systems
US-9506016-B2 · Nov 29, 2016 · US
Cleaning agent for semiconductor provided with metal wiring
US-9476019-B2 · Oct 25, 2016 · US
Methods and chemical solutions for cleaning photomasks using quaternary ammonium hydroxides
US-2016304815-A1 · Oct 20, 2016 · US
Detergent compositions
US-2016264542-A1 · Sep 15, 2016 · US
Detergent compositions
US-2016264561-A1 · Sep 15, 2016 · US
Oilfield cleaner and corrosion inhibitor comprising a polyamine sulfonic acid salt
US-9434911-B2 · Sep 6, 2016 · US
Method of treating a metal substrate
US-2016251603-A1 · Sep 1, 2016 · US
Method of treating a metal substrate
US-2016251602-A1 · Sep 1, 2016 · US
Cleansing agent composition comprising sulfonate-type surfactant and/or sulfate-type anionic surfactant and heterocyclic compound
US-9427388-B2 · Aug 30, 2016 · US
Quinazoline compounds and their use in perfume compositions
US-9416335-B2 · Aug 16, 2016 · US
Amino Modified Hydrocarbons
US-2016229929-A1 · Aug 11, 2016 · US
Liquid Chemical for Forming Water Repellent Protecting Film, and Process for Cleaning Wafers Using the Same
US-2016230016-A1 · Aug 11, 2016 · US
Multi-part kit system for the preparation of a disinfectant
US-2016219883-A1 · Aug 4, 2016 · US
Use of a bacterium isolated from the genus pseudoalteromonas, cyclolipopeptides and uses thereof
US-2016193284-A1 · Jul 7, 2016 · US
Personal care compositions containing zinc pyrithione and a metal-phosphonate complex
US-9375389-B2 · Jun 28, 2016 · US
Method of automatic dishwashing
US-2016177230-A1 · Jun 23, 2016 · US
Detergent composition
US-2016177229-A1 · Jun 23, 2016 · US
Method of automatic dishwashing
US-2016177231-A1 · Jun 23, 2016 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C11D3/28?
- CPC C11D3/28 is the Cooperative Patent Classification code for “Heterocyclic compounds containing nitrogen in the ring.”
- How many patents are filed under CPC C11D3/28 (Heterocyclic compounds containing nitrogen in the ring)?
- Our database includes 415 publications tagged with this CPC code.
- Is patent activity under CPC C11D3/28 growing?
- Publication counts under this code: 46 in 2024 vs 34 in 2025 (latest complete years).