Clad sheets for heat exchangers
US-2017368596-A1 · Dec 28, 2017 · US
with copper as the next major constituent
with copper as the next major constituent · 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 | C22C21/12 |
| Official title | with copper as the next major constituent |
| Display label | with copper as the next major constituent |
| Total patents | 298 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is rapidly declining.
| Year | Patents |
|---|---|
| 2015 | 22 |
| 2016 | 29 |
| 2017 | 26 |
| 2018 | 40 |
| 2019 | 40 |
| 2020 | 22 |
| 2021 | 32 |
| 2022 | 32 |
| 2023 | 25 |
| 2024 | 17 |
| 2025 | 10 |
| 2026 | 3 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Internal combustion engine
US-2017292470-A1 · Oct 12, 2017 · US
Flat steel product with an al-coating, method for producing the same, steel component and method for producing the same
US-2017260601-A1 · Sep 14, 2017 · US
Al-Mg-Zn Alloy With Scandium For The Integral Construction Of ALM Structures
US-2017233857-A1 · Aug 17, 2017 · US
Aluminum alloy laminate
US-2017182602-A1 · Jun 29, 2017 · US
Aluminium alloy laminated plate
US-2017173741-A1 · Jun 22, 2017 · US
Aluminum alloy and production method thereof
US-9657377-B2 · May 23, 2017 · US
Aluminum alloy plate, joined body, and automotive member
US-2017066220-A1 · Mar 9, 2017 · US
Porous aluminum complex and method of producing porous aluminum complex
US-2017043401-A1 · Feb 16, 2017 · US
Sliding bearing
US-9528550-B2 · Dec 27, 2016 · US
Aluminum-copper-lithium alloy product for a lower wing skin element with improved properties
US-2016368589-A1 · Dec 22, 2016 · US
Extruded products for aeroplane floors made of an aluminium-copper-lithium alloy
US-2016368588-A1 · Dec 22, 2016 · US
Method for manufacturing products made of aluminium-copper-lithium alloy with improved fatigue properties, and distributor for this method
US-2016355916-A1 · Dec 8, 2016 · US
Electrode and method for producing same
US-2016340773-A1 · Nov 24, 2016 · US
Piezoelectric film producing process, vibrator element, vibrator, oscillator, electronic device, and moving object
US-9461617-B2 · Oct 4, 2016 · US
2xxx series aluminum lithium alloys
US-9458528-B2 · Oct 4, 2016 · US
Metal matrix composite
US-2016273080-A1 · Sep 22, 2016 · US
Lightweight, robust, wear resistant components comprising an aluminum matrix composite
US-2016273081-A1 · Sep 22, 2016 · US
Aluminum alloys for highly shaped packaging products and methods of making the same
US-2016265090-A1 · Sep 15, 2016 · US
Semiconductor device and method of manufacturing the same
US-2016268222-A1 · Sep 15, 2016 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C22C21/12?
- CPC C22C21/12 is the Cooperative Patent Classification code for “with copper as the next major constituent.”
- How many patents are filed under CPC C22C21/12 (with copper as the next major constituent)?
- Our database includes 298 publications tagged with this CPC code.
- Is patent activity under CPC C22C21/12 growing?
- Publication counts under this code: 17 in 2024 vs 10 in 2025 (latest complete years).