Acidic treatment liquid processing apparatus, acidic treatment liquid processing method, surface treatment system, and surface treatment method
US-12371799-B2 · Jul 29, 2025 · US
Regeneration of waste pickling liquors
Regeneration of waste pickling liquors · 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 | C23G1/36 |
| Official title | Regeneration of waste pickling liquors |
| Display label | Regeneration of waste pickling liquors |
| Total patents | 30 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 2 |
| 2016 | 2 |
| 2017 | 2 |
| 2018 | 1 |
| 2019 | 3 |
| 2020 | 3 |
| 2021 | 2 |
| 2022 | 5 |
| 2023 | 4 |
| 2024 | 5 |
| 2025 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Cleaning plant for metal products
US-2024376609-A1 · Nov 14, 2024 · US
Acid solution preparation device, acid solution supply apparatus, and pickling facility
US-12139797-B2 · Nov 12, 2024 · US
Method for pickling steel plate and pickling apparatus
US-12091757-B2 · Sep 17, 2024 · US
Inline silicon deposition in a pickling plant
US-2024200202-A1 · Jun 20, 2024 · US
Method for pickling steel sheets
US-11879174-B2 · Jan 23, 2024 · US
High purity iron-bearing materials and systems and methods of production thereof
US-2023339770-A1 · Oct 26, 2023 · US
Method for manufacturing bottomed cylindrical body
US-2023122197-A1 · Apr 20, 2023 · US
Method for manufacturing bottomed cylindrical body
US-2023119966-A1 · Apr 20, 2023 · US
Workpiece cleaning apparatus and cleaning method
US-2023002912-A1 · Jan 5, 2023 · US
Electro-assisted pickling of steel
US-2022411952-A1 · Dec 29, 2022 · US
Method of purifying waste hydrochloric acid
US-11472702-B2 · Oct 18, 2022 · US
Method for pickling steel plate and pickling apparatus
US-2022220619-A1 · Jul 14, 2022 · US
Electrochemical deposition apparatus set and electrochemical deposition method
US-2022170152-A1 · Jun 2, 2022 · US
Acid solution preparation device, acid solution supply apparatus, and pickling facility
US-2022154351-A1 · May 19, 2022 · US
Acidic treatment liquid processing apparatus and acidic treatment liquid processing method
US-2021339198-A1 · Nov 4, 2021 · US
Acidic treatment liquid processing apparatus, acidic treatment liquid processing method, surface treatment system, and surface treatment method
US-2021339199-A1 · Nov 4, 2021 · US
Method for pickling steel sheets
US-2020270754-A1 · Aug 27, 2020 · US
Method of purifying waste hydrochloric acid
US-2020270132-A1 · Aug 27, 2020 · US
Methods, systems and apparatuses for copper removal from aluminum desmutting solutions
US-10745812-B2 · Aug 18, 2020 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C23G1/36?
- CPC C23G1/36 is the Cooperative Patent Classification code for “Regeneration of waste pickling liquors.”
- How many patents are filed under CPC C23G1/36 (Regeneration of waste pickling liquors)?
- Our database includes 30 publications tagged with this CPC code.
- Is patent activity under CPC C23G1/36 growing?
- Publication counts under this code: 5 in 2024 vs 1 in 2025 (latest complete years).