A zinc or zinc-alloy coated strip or steel with improved zinc adhesion
US-2024117455-A1 · Apr 11, 2024 · US
involving particular fabrication steps or treatments of ingots or slabs
involving particular fabrication steps or treatments of ingots or slabs · 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 | C21D8/021 |
| Official title | involving particular fabrication steps or treatments of ingots or slabs |
| Display label | involving particular fabrication steps or treatments of ingots or slabs |
| Total patents | 345 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is rapidly growing.
| Year | Patents |
|---|---|
| 2015 | 11 |
| 2016 | 15 |
| 2017 | 15 |
| 2018 | 12 |
| 2019 | 18 |
| 2020 | 26 |
| 2021 | 20 |
| 2022 | 50 |
| 2023 | 49 |
| 2024 | 45 |
| 2025 | 68 |
| 2026 | 16 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Duplex stainless steel material and duplex stainless steel tube
US-2019292639-A1 · Sep 26, 2019 · US
Quenched steel sheet having excellent strength and ductility and method for manufacturing same
US-2019233915-A1 · Aug 1, 2019 · US
Steel sheet and method for producing the same
US-2019194775-A1 · Jun 27, 2019 · US
Steel plate for thick-walled steel pipe, method for manufacturing the same, and thick-walled high-strength steel pipe
US-10240226-B2 · Mar 26, 2019 · US
High-hardness low-alloy wear-resistant steel sheet and method of manufacturing the same
US-10208369-B2 · Feb 19, 2019 · US
Manufacturing method for very high-strength, cold-rolled, dual-phase steel sheets
US-10190187-B2 · Jan 29, 2019 · US
Material for high strength steel sheets, hot rolled material for high strength steel sheets, hot-rolled and annealed material for high strength steel sheets, high strength steel sheet, high strength hot-dip-coated steel sheet, high strength electroplated steel sheet, and method of manufacturing same
US-2018363088-A1 · Dec 20, 2018 · US
Hot-dip galvanized steel sheet and manufacturing method of the same
US-10131981-B2 · Nov 20, 2018 · US
Hot pressed member and method of manufacturing same
US-2018305785-A1 · Oct 25, 2018 · US
Martensitic steel and method for producing same
US-10100383-B2 · Oct 16, 2018 · US
Superstrength cold-rolled weathering steel sheet and method of manufacturing same
US-10094011-B2 · Oct 9, 2018 · US
Abrasion resistant steel plate having excellent low-temperature toughness and method for manufacturing the same
US-10093998-B2 · Oct 9, 2018 · US
Carbon separator for solid polymer fuel cell, solid polymer fuel cell, and solid polymer fuel cell stack
US-2018269496-A1 · Sep 20, 2018 · US
Method for homogenizing steel compositions
US-2018245174-A1 · Aug 30, 2018 · US
High-strength hot-formed steel sheet member
US-10060005-B2 · Aug 28, 2018 · US
Process for producing hot-rolled steel strip
US-10053757-B2 · Aug 21, 2018 · US
Steel sheet for textile machinery parts and method for manufacturing the same
US-2018202022-A1 · Jul 19, 2018 · US
Thick, tough, high tensile strength steel plate and production method therefor
US-10000833-B2 · Jun 19, 2018 · US
Structural ultra-thick steel having excellent resistance to brittle crack propagation, and production method therefor
US-2017342518-A1 · Nov 30, 2017 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C21D8/021?
- CPC C21D8/021 is the Cooperative Patent Classification code for “involving particular fabrication steps or treatments of ingots or slabs.”
- How many patents are filed under CPC C21D8/021 (involving particular fabrication steps or treatments of ingots or slabs)?
- Our database includes 345 publications tagged with this CPC code.
- Is patent activity under CPC C21D8/021 growing?
- Publication counts under this code: 45 in 2024 vs 68 in 2025 (latest complete years).