Bismuth compositions for metal pretreatment applications
US-2022364240-A1 · Nov 17, 2022 · US
using aqueous acidic solutions with pH less than 6
using aqueous acidic solutions with pH less than 6 · 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 | C23C22/06 |
| Official title | using aqueous acidic solutions with pH less than 6 |
| Display label | using aqueous acidic solutions with pH less than 6 |
| Total patents | 91 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 3 |
| 2016 | 3 |
| 2017 | 7 |
| 2018 | 7 |
| 2019 | 14 |
| 2020 | 14 |
| 2021 | 9 |
| 2022 | 14 |
| 2023 | 4 |
| 2024 | 8 |
| 2025 | 4 |
| 2026 | 4 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Compositions and methods for metal pre-treatment
US-2022289892-A1 · Sep 15, 2022 · US
Composition for coating of metallic surfaces with good adhesion, in particular aluminum materials
US-11346002-B2 · May 31, 2022 · US
Method for treatment of a chromium finish surface
US-2021355594-A1 · Nov 18, 2021 · US
Abutment
US-2021307880-A1 · Oct 7, 2021 · US
Metal pretreatment composition containing zirconium, copper, zinc and nitrate and related coatings on metal substrates
US-11131027-B2 · Sep 28, 2021 · US
Method for manufacturing stainless steel for polymer fuel cell separator having excellent contact resistance
US-2021269920-A1 · Sep 2, 2021 · US
Method for treatment of a chromium finish surface
US-11078585-B2 · Aug 3, 2021 · US
Grain-oriented electrical steel sheet and method of manufacturing grain-oriented electrical steel sheet
US-11060159-B2 · Jul 13, 2021 · US
Pretreatment Agent and Chemical Conversion Treatment Agent
US-2021172068-A1 · Jun 10, 2021 · US
Galvanized steel sheet and manufacturing method therefor
US-10907255-B2 · Feb 2, 2021 · US
Processing method and processing apparatus of metal member
US-10895014-B2 · Jan 19, 2021 · US
Zinc-based plated steel sheet having post-treated coating formed thereon and post-treatment method therefor
US-2020399750-A1 · Dec 24, 2020 · US
Metal sheet having oiled Zn—Al—Mg coatings
US-10865483-B2 · Dec 15, 2020 · US
Surface treated steel sheet for fuel tank
US-10837118-B2 · Nov 17, 2020 · US
Anti-corrosion coating method
US-2020199757-A1 · Jun 25, 2020 · US
Steel sheet for a fuel tank
US-10688755-B2 · Jun 23, 2020 · US
Composition for Coating of Metallic Surfaces with Good Adhesion, In Particular Aluminum Materials
US-2020181778-A1 · Jun 11, 2020 · US
Conversion coating and method of making
US-10676828-B2 · Jun 9, 2020 · US
Treated article and method of making the same
US-10675658-B2 · Jun 9, 2020 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C23C22/06?
- CPC C23C22/06 is the Cooperative Patent Classification code for “using aqueous acidic solutions with pH less than 6.”
- How many patents are filed under CPC C23C22/06 (using aqueous acidic solutions with pH less than 6)?
- Our database includes 91 publications tagged with this CPC code.
- Is patent activity under CPC C23C22/06 growing?
- Publication counts under this code: 8 in 2024 vs 4 in 2025 (latest complete years).