Method for extracting a refractory metal from an ore, a concentrate or a waste product
US-12270089-B2 · Apr 8, 2025 · US
Obtaining tungsten
Obtaining tungsten · 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 | C22B34/36 |
| Official title | Obtaining tungsten |
| Display label | Obtaining tungsten |
| Total patents | 38 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is rapidly declining.
| Year | Patents |
|---|---|
| 2015 | 7 |
| 2016 | 6 |
| 2017 | 2 |
| 2018 | 6 |
| 2019 | 3 |
| 2020 | 4 |
| 2022 | 4 |
| 2023 | 4 |
| 2024 | 1 |
| 2025 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Process for oxidative cleavage of vegetable oils containing monosaturated fatty acid triglycerides
US-12049682-B2 · Jul 30, 2024 · US
Process for processing hard metal
US-2023392231-A1 · Dec 7, 2023 · US
Method for recovering metals from tungsten-containing metallic material
US-2023265574-A1 · Aug 24, 2023 · US
Process for the recovery of cobalt and tungstic acid and/or its derivatives from aqueous solutions
US-2023193420-A1 · Jun 22, 2023 · US
Process for the recovery of cobalt and tungstic acid and/or its derivatives from aqueous solutions
US-11603576-B2 · Mar 14, 2023 · US
Method for extracting a refractory metal from an ore, a concentrate or a waste product
US-2022364205-A1 · Nov 17, 2022 · US
Tungsten recovery method
US-2022136082-A1 · May 5, 2022 · US
Methods of forming a metal alloy
US-2022049368-A1 · Feb 17, 2022 · US
Method for preparing high-melting-point metal powder through multi-stage deep reduction
US-11241740-B2 · Feb 8, 2022 · US
Method for preparing high-melting-point metal powder through multi-stage deep reduction
US-2020276648-A1 · Sep 3, 2020 · US
Method for preparing pressed scandia-doped dispenser cathodes using microwave sintering
US-10651000-B2 · May 12, 2020 · US
Method for recovering at least one valuable containing tungsten
US-10538849-B2 · Jan 21, 2020 · US
Process for the recovery of cobalt and tungstic acid and/or its derivatives from aqueous solutions
US-2020010923-A1 · Jan 9, 2020 · US
Process for the recovery of cobalt and tungstic acid and/or its derivatives from aqueous solutions
US-10450631-B2 · Oct 22, 2019 · US
Method for producing tungsten
US-10422022-B2 · Sep 24, 2019 · US
Method for producing tungsten carbide
US-10227235-B2 · Mar 12, 2019 · US
Method for crushing hard tungsten carbide scraps
US-10161017-B2 · Dec 25, 2018 · US
Method for leaching valuable metals contained in waste denitrification catalyst by using roasting and water leaching
US-10017839-B2 · Jul 10, 2018 · US
Sodium tungstate production method
US-10011890-B2 · Jul 3, 2018 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C22B34/36?
- CPC C22B34/36 is the Cooperative Patent Classification code for “Obtaining tungsten.”
- How many patents are filed under CPC C22B34/36 (Obtaining tungsten)?
- Our database includes 38 publications tagged with this CPC code.
- Is patent activity under CPC C22B34/36 growing?
- Publication counts under this code: 1 in 2024 vs 1 in 2025 (latest complete years).