Ecological reconstructed sponge structure of strip mine dump and application of the same
US-11911813-B2 · Feb 27, 2024 · US
Reclamation of surface-mined areas (machines or methods for treating or working soil for agricultural purposes A01B77/00, A01B79/00; machines for back-filling E02F5/22) · Cooperative Patent Classification (CPC)
Building, mining, and civil engineering structures.
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | E21C41/32 |
| Official title | Reclamation of surface-mined areas (machines or methods for treating or working soil for agricultural purposes A01B77/00, A01B79/00; machines for back-filling E02F5/22) |
| Display label | Reclamation of surface-mined areas (machines or methods for treating or working soil for agricultural purposes A01B77/00, A01B79/00; machines for back-filling E02F5/22) |
| Total patents | 10 |
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is growing.
| Year | Patents |
|---|---|
| 2018 | 1 |
| 2020 | 1 |
| 2021 | 1 |
| 2022 | 1 |
| 2023 | 4 |
| 2024 | 2 |
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
US-11911813-B2 · Feb 27, 2024 · US
US-11884566-B2 · Jan 30, 2024 · US
US-11828177-B2 · Nov 28, 2023 · US
US-11821314-B2 · Nov 21, 2023 · US
US-2023235667-A1 · Jul 27, 2023 · US
US-2023003123-A1 · Jan 5, 2023 · US
US-2022251954-A1 · Aug 11, 2022 · US
US-2021221719-A1 · Jul 22, 2021 · US
US-10766798-B2 · Sep 8, 2020 · US
US-2018237321-A1 · Aug 23, 2018 · US