Hopper railroad car having top hatch cover assembly
US-12286141-B2 · Apr 29, 2025 · US
This page is not indexed by search engines while we improve data quality.
Adaptations of hopper elements to railways
Adaptations of hopper elements to railways · Cooperative Patent Classification (CPC)
Separating, mixing, shaping, printing, and transporting materials.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | B61D7/14 |
| Official title | Adaptations of hopper elements to railways |
| Display label | Adaptations of hopper elements to railways |
| Total patents | 11 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is stable.
| Year | Patents |
|---|---|
| 2015 | 1 |
| 2016 | 2 |
| 2017 | 1 |
| 2019 | 2 |
| 2021 | 1 |
| 2023 | 1 |
| 2024 | 1 |
| 2025 | 2 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Asymmetric hopper cars
US-2025042446-A1 · Feb 6, 2025 · US
Asymmetric hopper cars
US-12122431-B2 · Oct 22, 2024 · US
Hopper railroad car having top hatch cover assembly
US-2023113865-A1 · Apr 13, 2023 · US
Asymmetric hopper cars
US-2021362752-A1 · Nov 25, 2021 · US
Railroad car and door mechanism therefor
US-2019210621-A1 · Jul 11, 2019 · US
Railroad car and door mechanism therefor
US-10239542-B2 · Mar 26, 2019 · US
Transport container, vehicle, traction group, method for loading a transport container, and method for transporting bulk material
US-9580084-B2 · Feb 28, 2017 · US
Railroad car and door mechanism therefor
US-2016101790-A1 · Apr 14, 2016 · US
Railroad car and door mechanism therefor
US-9266539-B2 · Feb 23, 2016 · US
Transport container, vehicle, traction group, method for loading a transport container, and method for transporting bulk material
US-2015086324-A1 · Mar 26, 2015 · US