Stacked organic electroluminescent device
US-12454538-B2 · Oct 28, 2025 · US
with no nitrogen atoms directly attached to a ring carbon atom
with no nitrogen atoms directly attached to a ring carbon atom · 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 | C07D251/20 |
| Official title | with no nitrogen atoms directly attached to a ring carbon atom |
| Display label | with no nitrogen atoms directly attached to a ring carbon atom |
| Total patents | 37 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 7 |
| 2016 | 4 |
| 2017 | 2 |
| 2018 | 5 |
| 2019 | 1 |
| 2020 | 3 |
| 2022 | 8 |
| 2023 | 1 |
| 2024 | 4 |
| 2025 | 2 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Material for metal patterning, heterocyclic compound, thin film for metal patterning, organic electroluminescent device, electronic device, and method for forming metal pattern
US-2025154114-A1 · May 15, 2025 · US
Materials for organic electroluminescent devices
US-12108665-B2 · Oct 1, 2024 · US
Novel compound for light emitting device and organic light emitting device including same
US-2024276871-A1 · Aug 15, 2024 · US
Chemical coupling linker and use thereof
US-2024252665-A1 · Aug 1, 2024 · US
Prostaglandin E synthase inhibitors and methods for utilizing the same
US-12030877-B2 · Jul 9, 2024 · US
Impact of trace elements in the Grignard reaction
US-11697641-B2 · Jul 11, 2023 · US
Deoxyuridine triphosphatase inhibitors
US-11479531-B2 · Oct 25, 2022 · US
Stacked organic electroluminescent device
US-2022336768-A1 · Oct 20, 2022 · US
Carbocyclic nucleoside analogue
US-2022332737-A1 · Oct 20, 2022 · US
Materials for organic electroluminescent devices
US-2022310932-A1 · Sep 29, 2022 · US
Impact of trace elements in the grignard reaction
US-2022251050-A1 · Aug 11, 2022 · US
Prostaglandin E synthase inhibitors and methods for utilizing the same
US-11325901-B2 · May 10, 2022 · US
Prostaglandin E Synthase Inhibitors and Methods for Utilizing the Same
US-2022081432-A1 · Mar 17, 2022 · US
Multi-Arm Monomolecular White Light-Emitting Materials, Preparation Method and Application Thereof
US-2022009857-A1 · Jan 13, 2022 · US
Deoxyuridine triphosphatase inhibitors
US-2020270207-A1 · Aug 27, 2020 · US
Prostaglandin E Synthase Inhibitors and Methods for Utilizing the Same
US-2020231583-A1 · Jul 23, 2020 · US
Deoxyuridine triphosphatase inhibitors
US-10577321-B2 · Mar 3, 2020 · US
Process for the preparation of triazines
US-10183916-B2 · Jan 22, 2019 · US
Deoxyuridine triphosphatase inhibitors
US-2018334431-A1 · Nov 22, 2018 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C07D251/20?
- CPC C07D251/20 is the Cooperative Patent Classification code for “with no nitrogen atoms directly attached to a ring carbon atom.”
- How many patents are filed under CPC C07D251/20 (with no nitrogen atoms directly attached to a ring carbon atom)?
- Our database includes 37 publications tagged with this CPC code.
- Is patent activity under CPC C07D251/20 growing?
- Publication counts under this code: 4 in 2024 vs 2 in 2025 (latest complete years).