Stainless steel for fuel cell separator with excellent surface hydrophilicity and electrical conductivity, and manufacturing method thereof
US-2023420697-A1 · Dec 28, 2023 · US
solutions containing HNO3
solutions containing HNO3 · 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 | C23G1/085 |
| Official title | {solutions containing HNO3} |
| Display label | solutions containing HNO3 |
| Total patents | 85 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is growing.
| Year | Patents |
|---|---|
| 2015 | 2 |
| 2016 | 8 |
| 2017 | 5 |
| 2018 | 8 |
| 2019 | 6 |
| 2020 | 5 |
| 2021 | 6 |
| 2022 | 12 |
| 2023 | 10 |
| 2024 | 11 |
| 2025 | 10 |
| 2026 | 2 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Method for Extracting and Recovering Gold from Aqueous Solution
US-2023416871-A1 · Dec 28, 2023 · US
Ferritic stainless steel and component for exhaust gas
US-2023383390-A1 · Nov 30, 2023 · US
Method for producing electrical steel sheet
US-2023257841-A1 · Aug 17, 2023 · US
Ferritic stainless steel and method for manufacturing same, ferritic stainless steel sheet and method for manufacturing same, and fuel cell member
US-11667986-B2 · Jun 6, 2023 · US
Metallic material surface treatment agent, metallic material having surface treatment coating, and manufacturing method therefor
US-11603592-B2 · Mar 14, 2023 · US
Stainless steel having excellent surface electrical conductivity for fuel cell separator and method for manufacturing same
US-2023066817-A1 · Mar 2, 2023 · US
Process for the rapid blackening of surgical needles
US-11542607-B2 · Jan 3, 2023 · US
Ferritic stainless steel sheet for current collectors for sulfide-based solid-state batteries, and method for maufacturing same
US-2022263095-A1 · Aug 18, 2022 · US
Method for pickling steel plate and pickling apparatus
US-2022220619-A1 · Jul 14, 2022 · US
Martensitic stainless steel pipe and method of manufacturing the same
US-2022195610-A1 · Jun 23, 2022 · US
Method for manufacturing of stainless steel strips
US-2022177989-A1 · Jun 9, 2022 · US
Hot press member, production method for steel sheet for hot press, and production method for hot press member
US-2022177992-A1 · Jun 9, 2022 · US
Acid solution preparation device, acid solution supply apparatus, and pickling facility
US-2022154351-A1 · May 19, 2022 · US
Non oriented electrical steel sheet and method for producing thereof
US-2022145418-A1 · May 12, 2022 · US
Stainless steel sheet and method of manufacturing the same, separator for solid polymer fuel cell, solid polymer fuel cell, and solid polymer fuel cell battery
US-11326224-B2 · May 10, 2022 · US
Grain-oriented electrical steel sheet and method for manufacturing same
US-2022098692-A1 · Mar 31, 2022 · US
Chemical decontamination method using chelate free chemical decontamination reagent for removal of the dense radioactive oxide layer on the metal surface
US-11289232-B2 · Mar 29, 2022 · US
Method for manufacturing high-strength galvanized steel sheet
US-11248277-B2 · Feb 15, 2022 · US
Acid-resistant steel sheet and manufacturing method therefor
US-2022042179-A1 · Feb 10, 2022 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C23G1/085?
- CPC C23G1/085 is the Cooperative Patent Classification code for “solutions containing HNO3.”
- How many patents are filed under CPC C23G1/085 (solutions containing HNO3)?
- Our database includes 85 publications tagged with this CPC code.
- Is patent activity under CPC C23G1/085 growing?
- Publication counts under this code: 11 in 2024 vs 10 in 2025 (latest complete years).