Hopper car outlet gate mechanical flap to prevent pellet loss
US-2026015017-A1 · Jan 15, 2026 · US
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mechanical
mechanical · 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 | B61D7/26 |
| Official title | mechanical |
| Display label | mechanical |
| Total patents | 23 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 2 |
| 2016 | 2 |
| 2018 | 1 |
| 2019 | 3 |
| 2020 | 2 |
| 2021 | 3 |
| 2022 | 2 |
| 2023 | 4 |
| 2024 | 1 |
| 2025 | 2 |
| 2026 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Hopper car outlet gate mechanical flap to prevent pellet loss
US-12459547-B2 · Nov 4, 2025 · US
Discharge gate sensing method, system and assembly
US-12351218-B2 · Jul 8, 2025 · US
Discharge gate arrangements for railroad hopper cars
US-12024211-B2 · Jul 2, 2024 · US
Railroad hopper car with flow through structure
US-2023399033-A1 · Dec 14, 2023 · US
Discharge gate arrangements for railroad hopper cars
US-2023311955-A1 · Oct 5, 2023 · US
Discharge gate arrangements for railroad hopper cars
US-11708095-B2 · Jul 25, 2023 · US
Railroad hopper car with flow through structure
US-11691652-B2 · Jul 4, 2023 · US
Hopper Car Outlet Gate Mechanical Flap to Prevent Pellet Loss
US-2022315064-A1 · Oct 6, 2022 · US
Discharge Gate Sensing Method, System and Assembly
US-2022135093-A1 · May 5, 2022 · US
Discharge gate sensing method, system and assembly
US-11180170-B2 · Nov 23, 2021 · US
Discharge gate arrangements for railroad hopper cars
US-2021146967-A1 · May 20, 2021 · US
Discharge gate arrangements for railroad hopper cars
US-10906561-B2 · Feb 2, 2021 · US
Railroad hopper car with flow through structure
US-2020353954-A1 · Nov 12, 2020 · US
Discharge gate arrangements for railroad hopper cars
US-2020062280-A1 · Feb 27, 2020 · US
Discharge Gate Sensing Method, System and Assembly
US-2019225248-A1 · Jul 25, 2019 · 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
Railroad hopper car and door mechanism therefor
US-10023206-B2 · Jul 17, 2018 · US
Railroad car and door mechanism therefor
US-2016101790-A1 · Apr 14, 2016 · US