Field emitter and method for manufacturing same
US-2026018362-A1 · Jan 15, 2026 · US
Coating
Coating · Cooperative Patent Classification (CPC)
Electric circuits, power, telecommunications, and semiconductors.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | H01J2209/012 |
| Official title | Coating |
| Display label | Coating |
| Total patents | 37 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is rapidly declining.
| Year | Patents |
|---|---|
| 2017 | 5 |
| 2018 | 2 |
| 2019 | 7 |
| 2020 | 6 |
| 2021 | 7 |
| 2022 | 3 |
| 2023 | 3 |
| 2024 | 2 |
| 2025 | 1 |
| 2026 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Coated part for plasma processing chamber
US-2025246413-A1 · Jul 31, 2025 · US
Methods of making a self-assembled slow-wave structures
US-12091746-B2 · Sep 17, 2024 · US
Electron emitting element and method for manufacturing same
US-11887802-B2 · Jan 30, 2024 · US
Field emission devices
US-11810774-B2 · Nov 7, 2023 · US
Electron emitting element and method for manufacturing same
US-2023134647-A1 · May 4, 2023 · US
Electron source based on field emission and production process for same
US-2023005695-A1 · Jan 5, 2023 · US
Field Emission Devices
US-2022068584-A1 · Mar 3, 2022 · US
Self-assembled helical slow-wave structures for high-frequency signals
US-2022044904-A1 · Feb 10, 2022 · US
Self-aligned electrospray device and related manufacturing techniques
US-11217417-B2 · Jan 4, 2022 · US
Electron emission element and method for manufacturing same
US-11205555-B2 · Dec 21, 2021 · US
Traveling wave tube amplifier having a helical slow-wave structure supported by a cylindrical scaffold
US-11201028-B2 · Dec 14, 2021 · US
Electron source and production method therefor
US-11152185-B2 · Oct 19, 2021 · US
Electron source and production method therefor
US-2021193427-A1 · Jun 24, 2021 · US
Electron emission element and method for manufacturing same
US-2021175039-A1 · Jun 10, 2021 · US
Self-assembled helical slow-wave structures for high-frequency signals
US-2021099142-A1 · Apr 1, 2021 · US
Electron source and production method therefor
US-10957511-B2 · Mar 23, 2021 · US
Self-aligned electrospray device and related manufacturing techniques
US-2020395186-A1 · Dec 17, 2020 · US
Enhanced electron amplifier structure and method of fabricating the enhanced electron amplifier structure
US-10867768-B2 · Dec 15, 2020 · US
Method of manufacturing emitter
US-10658143-B2 · May 19, 2020 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC H01J2209/012?
- CPC H01J2209/012 is the Cooperative Patent Classification code for “Coating.”
- How many patents are filed under CPC H01J2209/012 (Coating)?
- Our database includes 37 publications tagged with this CPC code.
- Is patent activity under CPC H01J2209/012 growing?
- Publication counts under this code: 2 in 2024 vs 1 in 2025 (latest complete years).