Process for operating a plant for preparing an alkanesulfonic acid
US-10494331-B2 · Dec 3, 2019 · US
Treatment of iron or alloys based thereon
Treatment of iron or alloys based thereon · 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 | C23C22/50 |
| Official title | Treatment of iron or alloys based thereon |
| Display label | Treatment of iron or alloys based thereon |
| Total patents | 187 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is growing.
| Year | Patents |
|---|---|
| 2015 | 8 |
| 2016 | 15 |
| 2017 | 9 |
| 2018 | 18 |
| 2019 | 26 |
| 2020 | 15 |
| 2021 | 13 |
| 2022 | 24 |
| 2023 | 16 |
| 2024 | 18 |
| 2025 | 19 |
| 2026 | 6 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Surface-treated metal sheet and organic resin-covered surface-treated metal sheet
US-10457832-B2 · Oct 29, 2019 · US
Alloy surface activation by immersion in aqueous acid solution
US-10450658-B2 · Oct 22, 2019 · US
Sealing Composition
US-2019316261-A1 · Oct 17, 2019 · US
Process for the Rapid Blackening of Surgical Needles
US-2019301024-A1 · Oct 3, 2019 · US
Low corrosion alkane sulfonic acids for condensation reactions
US-2019301027-A1 · Oct 3, 2019 · US
Stainless-steel foil for separator of polymer electrolyte fuel cell
US-10431832-B2 · Oct 1, 2019 · US
Aqueous corrosion protection formulation based on silanes
US-2019153238-A1 · May 23, 2019 · US
Method for producing metal-plated stainless material
US-10287689-B2 · May 14, 2019 · US
Electromagnetic shielding material
US-10272646-B2 · Apr 30, 2019 · US
Gold plate coated stainless material and method of producing gold plate coated stainless material
US-10113238-B2 · Oct 30, 2018 · US
Alloy plate coated material and method of producing alloy plate coated material
US-2018290434-A1 · Oct 11, 2018 · US
Surface-treated metal sheet and organic resin-covered surface-treated metal sheet
US-2018291232-A1 · Oct 11, 2018 · US
Coating carbon steel tubing with iron sulfide
US-2018265992-A1 · Sep 20, 2018 · US
Architectural Resin Panel with Rust Layer and Methods for Making the Same
US-2018257339-A1 · Sep 13, 2018 · US
Conversion coating composition comprising a dye and a method for coating a metal surface with said conversion coating composition
US-2018237920-A1 · Aug 23, 2018 · US
No-rinse pretreatment methods and compositions
US-10041176-B2 · Aug 7, 2018 · US
Conducting member for fuel cells, fuel cell, fuel cell stack, and method of producing conducting member for fuel cells
US-2018198152-A1 · Jul 12, 2018 · US
Zirconium pretreatment compositions containing a rare earth metal, associated methods for treating metal substrates, and related coated metal substrates
US-10017861-B2 · Jul 10, 2018 · US
Alloy plate coated material and method of producing alloy plate coated material
US-10000038-B2 · Jun 19, 2018 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C23C22/50?
- CPC C23C22/50 is the Cooperative Patent Classification code for “Treatment of iron or alloys based thereon.”
- How many patents are filed under CPC C23C22/50 (Treatment of iron or alloys based thereon)?
- Our database includes 187 publications tagged with this CPC code.
- Is patent activity under CPC C23C22/50 growing?
- Publication counts under this code: 18 in 2024 vs 19 in 2025 (latest complete years).