Extraction of non-metals · Cooperative Patent Classification (CPC)
Chemical and metallurgical processes, compounds, and materials.
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | C21D3/02 |
| Official title | Extraction of non-metals |
| Display label | Extraction of non-metals |
| Total patents | 19 |
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2016 | 5 |
| 2017 | 3 |
| 2018 | 1 |
| 2019 | 1 |
| 2020 | 2 |
| 2021 | 2 |
| 2022 | 2 |
| 2023 | 2 |
| 2024 | 1 |
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
US-11884988-B2 · Jan 30, 2024 · US
US-2023090530-A1 · Mar 23, 2023 · US
US-2023087092-A1 · Mar 23, 2023 · US
US-11326243-B2 · May 10, 2022 · US
US-2022105564-A1 · Apr 7, 2022 · US
US-2021317542-A1 · Oct 14, 2021 · US
US-10895014-B2 · Jan 19, 2021 · US
US-2020325568-A1 · Oct 15, 2020 · US
US-2020243882-A1 · Jul 30, 2020 · US
US-2019271085-A1 · Sep 5, 2019 · US
US-10010935-B2 · Jul 3, 2018 · US
US-9815115-B2 · Nov 14, 2017 · US
US-2017066022-A1 · Mar 9, 2017 · US
US-9580789-B2 · Feb 28, 2017 · US
US-2016305007-A1 · Oct 20, 2016 · US
US-2016303652-A1 · Oct 20, 2016 · US
US-9376741-B2 · Jun 28, 2016 · US
US-2016114391-A1 · Apr 28, 2016 · US
US-9321103-B2 · Apr 26, 2016 · US